WO2005052927A1 - Thin film piezoelectric micro-actuator for head gimbal assembly - Google Patents
Thin film piezoelectric micro-actuator for head gimbal assembly Download PDFInfo
- Publication number
- WO2005052927A1 WO2005052927A1 PCT/CN2003/001007 CN0301007W WO2005052927A1 WO 2005052927 A1 WO2005052927 A1 WO 2005052927A1 CN 0301007 W CN0301007 W CN 0301007W WO 2005052927 A1 WO2005052927 A1 WO 2005052927A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- thin film
- actuator
- micro
- suspension
- film piece
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
- G11B5/4826—Mounting, aligning or attachment of the transducer head relative to the arm assembly, e.g. slider holding members, gimbals, adhesive
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
- G11B5/5552—Track change, selection or acquisition by displacement of the head across disk tracks using fine positioning means for track acquisition separate from the coarse (e.g. track changing) positioning means
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
- G11B5/5552—Track change, selection or acquisition by displacement of the head across disk tracks using fine positioning means for track acquisition separate from the coarse (e.g. track changing) positioning means
- G11B5/5556—Track change, selection or acquisition by displacement of the head across disk tracks using fine positioning means for track acquisition separate from the coarse (e.g. track changing) positioning means with track following after a "seek"
Definitions
- FIG. 1 illustrates a hard disk drive design typical in the art.
- Hard disk drives 100 are common information storage devices consisting essentially of a series of rotatable disks 104 that are accessed by magnetic reading and writing elements. These data transferring elements, commonly known as transducers, are typically carried by and embedded in a slider body 110 that is held in a close relative position over discrete data tracks formed on a disk to permit a read or write operation to be carried out.
- the slider is held above the disks by a suspension.
- the suspension has a load beam and flexure allowing for movement in a direction perpendicular to the disk.
- the suspension is rotated around a pivot by a voice coil motor to provide coarse position adjustments.
- Figure 1 illustrates a hard disk drive design typical in the art.
- the width of the leading beam 503 is narrower than the base 501 and the slider support 502.
- the slider support 502 is flanked by side beams 504 to be attached to the thin film pieces of PZT 402.
- the thin film pieces of PZT each have an electrical bonding pad 505 that allow an electrical signal to be input.
- the thin film pieces of PZT have a common grounding pad 506.
- the thin film pieces of PZT 402 are combined with the T-shaped slider support frame 401 to form the thin film PZT micro-actuator 507 illustrated in Figure 5b.
- the sides of the thin film pieces of PZT 402 opposite the electrical bonding pads 505 are coupled to the top of the base 501.
- the second thin film piece of PZT 802 is receiving a negative voltage, causing it to shrink. This causes the T-shaped slider support frame 401 to bend to the right.
- FIG 9 One embodiment for fabricating a head gimbal assembly with a thin film PZT micro-actuator 507 is illustrated by Figure 9 in a flowchart and Figures lOa-f in a series of diagrams. The process starts (Block 910) with a T- shaped slider support frame 401 and two thin film pieces of PZT 402, as shown in Figure 10a. Each thin film piece of PZT 402 has an electrical bonding pad 505 and a ground pad 506 common to both thin film pieces.
Abstract
A thin film piezoelectric (PZT) micro-actuator is disclosed. Two thin film pieces of PZT are couple to a slider support frame. The slider support frame has a slider support connected by a leading beam to a base. The two thin film pieces of PZT connect the slider support to the base. Applied voltage causes the thin film pieces of PZT to contract or expand, moving the slider support in relation to the base. The thin film pieces of PZT can be single or multiple layers. The thin film PZT micro-actuator can be coupled to the suspension by anisotropic conductive film, with the thin film pieces of PZT between the slider support frame and the suspension. Alternately, the thin film PZT micro-actuator can be coupled to the suspension with the thin film pieces of PZT exterior to the slider support frame and the suspension.
Description
THIN FILM PIEZOELECTRIC MICRO-ACTUATOR FOR HEAD GIMBAL ASSEMBLY
Background Information [0001] The present invention is directed to micro-actuators used in hard disk drive head gimbal assemblies. More specifically, the present invention pertains to thin film piezoelectric micro-actuators.
[0002] Figure 1 illustrates a hard disk drive design typical in the art. Hard disk drives 100 are common information storage devices consisting essentially of a series of rotatable disks 104 that are accessed by magnetic reading and writing elements. These data transferring elements, commonly known as transducers, are typically carried by and embedded in a slider body 110 that is held in a close relative position over discrete data tracks formed on a disk to permit a read or write operation to be carried out. The slider is held above the disks by a suspension. The suspension has a load beam and flexure allowing for movement in a direction perpendicular to the disk. The suspension is rotated around a pivot by a voice coil motor to provide coarse position adjustments. A micro-actuator couples the slider to the end of the suspension and allows fine position adjustments to be made. [0003] In order to properly position the transducer with respect to the disk surface, an air bearing surface (ABS) formed on the slider body 110 experiences a fluid air flow that provides sufficient lift force to "fly" the slider 110 (and transducer) above the disk data tracks. The high speed rotation of a magnetic disk 104 generates a stream of air flow or wind along its surface in a direction substantially parallel to the tangential velocity of the disk. The air flow cooperates with the ABS of the slider body 110 which enables the slider to fly above the spinning disk. In effect, the suspended slider 110 is physically separated from the disk surface 104 through this self-actuating air bearing. The ABS of a slider 110 is generally configured on the slider surface facing the
rotating disk 104 (see below), and greatly influences its ability to fly over the disk under various conditions.
[0004] Figure 2a illustrates a micro-actuator with a U-shaped ceramic frame configuration 201. The frame 201 is made of, for example, Zirconia. The frame 201 has two arms 202 opposite a base 203. A slider 204 is held by the two arms 202 at the end opposite the base 203. A strip of piezoelectric material 205 is attached to each arm 202. A bonding pad 206 allows the slider 204 to be electronically connected to a controller. Figure 2b illustrates the micro-actuator as attached to an actuator suspension flexure 207 and load beam 208. The micro- actuator can be coupled to a suspension tongue 209. Traces 210, coupled along the suspension flexure 207, connect the strips of piezoelectric material 205 to a set of connection pads 211. Voltages applied to the connection pads 211 cause the strips 205 to contract and expand, moving the placement of the slider 204. The suspension flexure 207 can be attached to a base plate 212 with a hole 213 for mounting on a pivot via a suspension hinge 214. A tooling hole 215 facilitates handling of the suspension during manufacture and a suspension hole 216 lightens the weight of the suspension.
[0005] Figure 3 illustrates a prior art method for coupling a slider 204 to a micro-actuator 201. Two drops of epoxy or insulative adhesive 301 are added to both sides of the slider 204. The slider 204 may then be inserted into the U- shaped micro-actuator. The back surfaces of the slider 204 and the micro- actuator 201 are kept at the same height throughout the curing process. [0006] The manufacture of a U-shaped frame is very difficult. The epoxy bonding process is difficult to control, leading to problems with performance. Additionally, the frame itself is bulky, with poor shock performance and a tendency for particle generation and electrostatic damage. Slider tilt during the manufacturing process can create problems with the head gimbal assembly static control. A large amount of voltage is needed to drive the micro-actuator. All this leads to a general poor performance by the U-shaped micro-actuator.
Brief Description Of The Drawings
[0007] Figure 1 illustrates a hard disk drive design typical in the art.
[0008] Figure 2 illustrates a typical head gimbal assembly having a U- shaped micro-actuator.
[0009] Figure 3 illustrates a prior art method for coupling a slider to a micro-actuator.
[0010] Figures 4a-c illustrate one embodiment of a thin film PZT micro- actuator coupled to a head gimbal assembly, according to the present invention. [0011] Figures 5a-b illustrate one embodiment of a thin film PZT micro- actuator, according to the present invention.
[0012] Figure 6 illustrates one embodiment of a multiple layer thin film piece of piezoelectric material. [0013] Figures 7a-b illustrate various embodiments of the operation of the thin film pieces of PZT.
[0014] Figures 8a-c illustrate the effect of the driving voltage on the micro- actuator.
[0015] Figure 9 illustrates in a flowchart one embodiment for fabricating a head gimbal assembly with a thin film PZT micro-actuator according to the present invention.
[0016] Figures lOa-e illustrates in a series of diagrams one embodiment for fabricating a head gimbal assembly with a thin film PZT micro-actuator according to the present invention. [0017] Figure 11 illustrates one embodiment of using anisotropic conductive film in the bonding process between the thin film pieces of PZT and the suspension tongue.
[0018] Figures 12 a-e illustrate in graph form the results of tests comparing the thin film PZT micro-actuator to a traditional U-shaped micro-actuator.
[0019] Figures 13a-d illustrate an alternate embodiment for thin film PZT micro-actuator according to the present invention.
Detailed Description [0020] A thin film piezoelectric (PZT) micro-actuator is disclosed. Two thin film pieces of PZT are couple to a metal T-shaped support frame. The T-shaped slider support frame has a slider support connected by a leading beam to a base. The two thin film pieces of PZT connect the slider support to the base. Applied voltage causes the thin film pieces of PZT to contract or expand, moving the slider support in relation to the base. The thin film pieces of PZT can be single or multiple layers. The thin film PZT micro-actuator can be coupled to the suspension by anisotropic conductive film, with the thin film pieces of PZT between the T-shaped slider support frame and the suspension. Alternately, the thin film PZT micro-actuator can be coupled to the suspension with the thin film pieces of PZT exterior to the T-shaped slider support frame and the suspension. [0021] Figures 4a-c illustrate one embodiment of a thin film PZT micro- actuator coupled to a head gimbal assembly. Figure 4a shows a detailed illustration of one embodiment of the micro-actuator coupled to the suspension tongue 209. The slider 204 is coupled to a T-shaped slider support frame 401. In one embodiment, the T-shaped slider support frame is made of metal. A thin film piece of PZT 402 is coupled to each side of the T-shaped slider support frame 401 to act as a position controller. By applying a controlled voltage to each thin film piece of PZT 402, the thin film pieces of PZT 402 are made to expand or contract, causing the front end of the T-shaped slider support frame 401 to be pulled to the left or to the right. In one embodiment, the slider is coupled to the T-shaped slider support frame by anisotropic conductive film (ACF), which electrically couples the slider as well as physically, reducing the likelihood of electrostatic damage. In another embodiment, the slider is physically coupled to the T-shaped slider support frame by UV resin or adhesive and electrically
coupled by an silver epoxy or resin. A suspension outrigger 403 supports the T-shaped slider support frame 401. The slider 204 is also electrically connected to a set of bonding pads 206 mounted on a connection plate 404. The slider 204 is electrically connected to the set of bonding pads 206 by gold ball bonding or solder ball bonding 405. The micro-actuator is connected to a set of traces 406 leading back to the connection pads 211. Voltages sent along these traces 406 can be used to control the micro-actuator. Figure 4b shows one embodiment of the micro-actuator connected to head gimbal assembly. In this embodiment, the set of bonding pads 206 are connected to a set of traces 210 leading to the connection pads 211. Figure 4c shows in a side view the micro-actuator as connected to a suspension. A parallel gap 407 is maintained between the suspension outrigger 403 and the T-shaped slider support frame 401, allowing the micro-actuator to move smoothly. The parallel gap can be between 35 and 50 μm. The suspension outriggers 403 and a dimple 407 focus the load force on the center of the slider 204.
[0022] Figures 5a-b illustrate one embodiment of a thin film PZT micro- actuator. Figure 5a illustrates one embodiment of the T-shaped slider support frame 401 and the thin film pieces of PZT 402. In one embodiment, the slider support frame has a base 501 coupled to a slider support 502 by a flexible leading beam 503. The base 501 and the flexible leading beam 503 act as a swing support. The base 501 can be used as a datum for alignment purposes when coupling the micro-actuator to the suspension. The leading beam 503 bends to allow the slider support 502 to be moved in a horizontal swinging movement by the thin film pieces of PZT 402 in relation to the base 501. In one embodiment, the width of the leading beam 503 is narrower than the base 501 and the slider support 502. The slider support 502 is flanked by side beams 504 to be attached to the thin film pieces of PZT 402. The thin film pieces of PZT each have an electrical bonding pad 505 that allow an electrical signal to be input. In one embodiment, the thin film pieces of PZT have a common grounding pad
506. In one embodiment, the thin film pieces of PZT 402 are combined with the T-shaped slider support frame 401 to form the thin film PZT micro-actuator 507 illustrated in Figure 5b. The sides of the thin film pieces of PZT 402 opposite the electrical bonding pads 505 are coupled to the top of the base 501. In one embodiment, the thin film pieces of PZT 402 have an insulation layer (not shown) on each side. The insulation layers only expose the bonding pad. These insulation layers protect the thin film of PZT 402 to prevent electrical shorts during coupling of the metal T-shaped slider support frame and suspension. The thin film pieces of PZT 402 have one end coupled to the base and the other end coupled to the side beams 504 of the slider support 502.
[0023] The thin film pieces of piezoelectric material can have a single layer or multiple layers. Figure 6 illustrates one embodiment of a multiple layer thin film piece of PZT 402. The first layer 601 is a base support ductile material, such as a polymide, to protect the PZT and increase the shock performance. The third and seventh layer 602 is a PZT. The third and seventh layers 602 are surrounded by PZT electric layers 603 and 604, representing the second, fourth, sixth, and eighth layers. These PZT electric layer 603 and 604 can be made of platinum, gold, or other similar metals. An insulative adhesive, such as epoxy, layer 605, acting as the fifth layer, couples the fourth and sixth layers 604 to each other. The exterior PZT electric layers 603 are coupled to a first bonding pad 606. The interior PZT electric layers 604 are couple to a second bonding pad 607. [0024] Figures 7a-b illustrate various embodiments of the operation of the thin film pieces of PZT. Figure 7a shows one embodiment of a micro-actuator 507 in which the two thin film pieces of PZT have matching polarities. A first thin film piece of PZT 701 and a second thin film piece of PZT 702 are polarized in the same direction. The first thin film piece of PZT 701 has a first input pad 703, the second thin film piece of PZT 702 has a second input pad 704, and the two thin film pieces of PZT have a common ground 705. A first sine voltage 706 is input to the first input pad 703 and an opposed phase sine voltage 707 is input
to the second input pad 704 to drive the micro-actuator. Figure 7b shows one embodiment of a micro-actuator 507 in which the two thin film pieces of PZT have opposing polarities. The first thin film piece of PZT 708 and the second thin film piece of PZT 709 are polarized in opposite directions. A single sine voltage 710 is input to the first input pad 703 and the second input pad 704 to drive the micro-actuator.
[0025] Figures 8a-c illustrate the effect of the driving voltage on the micro- actuator. Figure 8a shows the micro-actuator 507 and slider 204 with no voltage being applied. Figure 8b shows one embodiment of the micro-actuator 507 and slider 204 with voltage applied. The first thin film piece of PZT 801 is receiving a negative voltage, causing it to shrink. The second thin film piece of PZT 802 is receiving a positive voltage, causing it to extend. This causes the T-shaped slider support frame 401 to bend to the left. Figure 8c shows an alternate embodiment of the micro-actuator 507 and slider 204 with voltage applied. The first thin film piece of PZT 801 is receiving a positive voltage, causing it to extend. The second thin film piece of PZT 802 is receiving a negative voltage, causing it to shrink. This causes the T-shaped slider support frame 401 to bend to the right. [0026] One embodiment for fabricating a head gimbal assembly with a thin film PZT micro-actuator 507 is illustrated by Figure 9 in a flowchart and Figures lOa-f in a series of diagrams. The process starts (Block 910) with a T- shaped slider support frame 401 and two thin film pieces of PZT 402, as shown in Figure 10a. Each thin film piece of PZT 402 has an electrical bonding pad 505 and a ground pad 506 common to both thin film pieces. As shown in Figure 10b, the two thin film pieces of PZT 402 are attached to the T-shape slider support frame 401 to create the thin film PZT micro-actuator 507 (Block 920). Figure 10c illustrates one embodiment of a suspension on which to mount the thin film PZT micro-actuator 507. In one embodiment, the suspension tongue 209 of the suspension has an electrical bonding pad 1001 for each thin film piece
of PZT 402, as well as a grounding pad 1002. The suspension electrical bonding pads 1001 are each electrically linked to a micro-actuator trace 406. [0027] One option for attaching the thin film PZT micro-actuator is the use of anisotropic conductive film. In one embodiment shown in Figure lOd, a layer of ACF 1003 is placed across the suspension tongue. In one embodiment shown in Figure 11, anisotropic conductive film 1101 is used in the bonding process by forming a layer between the thin film pieces of PZT 402 and the suspension tongue 209. The micro-actuator electrical bonding pads 505 are aligned with the suspension electrical bonding pads 1001. The micro-actuator grounding pad 506 is aligned with the suspension grounding pad 1002. A pressure of 30-200 MPa and a temperature of 60-400 Celsius are applied to form the bond. The metal grains in the anisotropic conductive film create an electrical connection, while an insulative adhesive, such as epoxy, creates a physical bond. [0028] Returning to Figure 9, the thin film PZT micro-actuator 507 is then attached to the suspension tongue 209 by the two thin film pieces of PZT 402 (Block 930), as shown in Figure lOe. The static and dynamic performance of the thin film PZT micro-actuator 507 is tested to screen out defects (Block 940). As shown in Figure lOf, the slider 204 is attached to the thin film PZT micro- actuator 507 at the slider support 502 (Block 950). In one embodiment, slider 204 is bonded to the slider support 502 using anisotropic conductive film. The slider 204 is electrically bonded to the bonding pads 206 of the suspension (Block 960). In one embodiment, the slider is electrically bonded using gold ball bonding or solder ball bonding 405. The static dynamic performance of the slider is then tested (Block 970). If no defects are found, the process is completed (Block 980).
[0029] Figures 12 a-e illustrate in graph form the results of some of these tests as compared to a traditional U-shaped micro-actuator. Figure 12a shows the displacement in micrometers in response to the voltage applied. A first test 1201 was run with the thin film PZT micro-actuator and a second test 1202 was
run with traditional micro-actuator. Figure 12b shows the resonance gain in decibels at various frequencies in kilohertz for the present invention. A first measurement 1203 is taken by exciting the base plate. A second measurement
1204 is taken by exciting the PZT. Figure 12c shows the resonance gain in decibels at various frequencies in kilohertz for the prior art. A first measurement
1205 is taken by exciting the base plate. A second measurement 1206 is taken by exciting the PZT. Due to the mass effect, a small gain, from 6-10 dB, is shown in the resonance by the present invention over the prior art. Figure 12d shows the resonance phase in degrees at various frequencies in kilohertz for the present invention. A. first measurement 1207 is taken by exciting the base plate. A second measurement 1208 is taken by exciting the PZT. Figure 12e shows the resonance gain in decibels at various frequencies in kilohertz for the prior art. A first measurement 1209 is taken by exciting the base plate. A second measurement 1210 is taken by exciting the PZT. Again only a small gain, from 6-10 dB, is shown in the resonance by the present invention over the prior art. [0030] Figures 13a-f illustrate an alternate embodiment for thin film PZT micro-actuator. As shown in Figure 13a, a T-shaped slider support frame 401 and two thin, film pieces of PZT 402 are assembled. The two thin film pieces of PZT 402 are coupled to the T-shaped slider support frame 401 to form a thin film PZT micro-actuator 507, as shown in Figure 13b. Figure 13c illustrates one embodiment of a suspension on which to mount the thin film PZT micro-actuator 507. In one embodiment, the suspension tongue 209 of the suspension has an electrical bonding pad 1001 for each thin film piece of PZT 402, as well as a grounding pad 1002. The suspension electrical bonding pads 1001 are each electrically linked to a micro-actuator trace 406. In one embodiment shown in Figure 13d, a layer of ACF 1003 is placed across the suspension tongue. As shown in Figure 13e, the thin film PZT micro-actuator 507 is coupled to the suspension tongue 209 by the base 501 of the T-shaped slider support frame 401. The thin film pieces of PZT 402 are exterior to the T-shaped slider support frame
401 and the suspension in this embodiment. A support layer (not shown) can be inserted between the base 501 and the suspension tongue 209 to maintain a parallel gap. As shown in Figure 13f, a wire 1301 couples each micro-actuator electrical bonding pad 505 to the corresponding suspension electrical bonding pad 1001. The wire 1301 can be coupled to the electrical bonding pads by gold ball bonding or silver ball bonding 1302. Similarly, as shown in Figure 13c, the micro-actuator grounding pad 506 is coupled by a wire 1303 to the suspension grounding pad 1002.
Claims
1. A micro-actuator, comprising: a slider support frame with a slider support to hold the slider and a swing support to allow at least a horizontal swinging movement of the slider support; and a position controller connecting the slider support frame to control the position of the slider.
2. The micro-actuator of claim 1, wherein the slider support further comprises: a first side beam and a second side beam disposed respectively on each side of the slider support to couple the position controller to the slider support frame.
3. The micro-actuator of claim 1, wherein the swing support includes: a base to couple the suspension; and a leading beam connecting between the slider support and the base to support the horizontal swinging movement of the slider support.
4. The micro-actuator of claim 3, wherein the swing support is T-shaped.
5. The micro-actuator of claim 3, wherein the leading beam has a narrower width than the slider support or the base.
6. The micro-actuator of claim 1; wherein the positioning controller includes: a first thin film piece of piezoelectric material coupled to the first side of the slider support frame; and a second thin film piece of piezoelectric material coupled to the second side of the slider support frame.
7. The micro-actuator of claim 2; wherein the positioning controller includes: a first thin film piece of piezoelectric material coupled to the first side beam of the slider support; and a second thin film piece of piezoelectric material coupled to the second side beam of the slider support.
8. The micro-actuator of claim 6, further comprising: a first electrical bonding pad electrically coupled to the first thin film piece of piezoelectric material; a second electrical bonding pad electrically coupled to the second thin film piece of piezoelectric material; and a grounding pad electrically coupled to the first thin film piece of piezoelectric material and the second thin film piece of piezoelectric material.
9. The micro-actuator of claim 6, wherein the first thin film piece of piezoelectric material and the second thin film piece of piezoelectric material have one or more layers.
10. The micro-actuator of claim 6, wherein the first thin film piece and the second thin film piece have: a first layer of ductile material; a third and seventh layer of piezoelectric material above the first layer; a second, fourth, sixth, and eighth layer of thin electric material surrounding the third and seventh layers; and a fifth layer of an insulative adhesion material coupling the fourth layer to the sixth layer.
11. A magnetic head gimbal assembly, comprising: a slider having a magnetic head for reading and writing data onto and from a magnetic disk, a suspension for providing the slider, a proximal portion of which is attached to an actuator arm of a coarse adjustment actuator for positioning the slider on the magnetic disk; a micro-actuator disposed on the suspension for a fine adjustment of the slider; a flexible circuit electrically coupled to the slider and the micro-actuator; wherein the micro-actuator having a slider support frame coupled to the suspension with a slider support to hold the slider and a swing support to allow at least a horizontal swinging movement of the slider support; and a position controller connecting the slider support frame to control the position of the slider.
12. A magnetic head gimbal assembly of claim 11, wherein the slider support further comprises: a first side beam and a second side beam disposed respectively on each side of the slider support to couple the position controller to the slider support frame.
13. A magnetic head gimbal assembly of claim 11, wherein the swing support includes: a base to couple the suspension; and a leading beam connecting between the slider support and the base to support the horizontal swinging movement of the slider support.
14. A magnetic head gimbal assembly of claim 13, wherein the leading beam has a narrower width than the slider support or the base.
15. A magnetic head gimbal assembly of claim 11, wherein the positioning controller includes: a first thin film piece of piezoelectric material coupled to the first side of the slider support frame; and a second thin film piece of piezoelectric material coupled to the second side of the slider support frame.
16. A magnetic head gimbal assembly of claim 12, wherein the positioning controller includes: a first thin film piece of piezoelectric material coupled to the first side beam of the slider support; and a second thin film piece of piezoelectric material coupled to the second side beam of the slider support.
17. A magnetic head gimbal assembly of claim 15, further comprising: a first micro-actuator electrical bonding pad electrically coupled to the first thin film piece of piezoelectric material; a second micro-actuator electrical bonding pad electrically coupled to the second thin film piece of piezoelectric material; and a micro-actuator grounding pad electrically coupled to the first thin film piece of piezoelectric material and the second thin film piece of piezoelectric material, and the suspension includes: a first suspension electrical bonding pad coupled to a first micro actuator trace; a second suspension electrical bonding pad coupled to a second micro actuator trace; and a suspension grounding pad.
18. A magnetic head gimbal assembly of claim 17, further comprising: an anisotropic conductive film to physically couple the first thin film piece of piezoelectric material and the second thin film piece of piezoelectric material to the suspension and to electrically couple the first micro-actuator electrical bonding pad to the first suspension electrical bonding pad, the second micro- actuator electrical bonding pad to the second suspension bonding pad, and the micro-actuator grounding pad to the suspension grounding pad.
19. A magnetic head gimbal assembly of claim 17, further comprising: an insulative adhesion material to physically couple the swing support to the suspension; a bonding wire to electrically couple the first micro-actuator electrical bonding pad to the first suspension electrical bonding pad, the second micro- actuator electrical bonding pad to the second suspension bonding pad, and the micro-actuator grounding pad to the suspension grounding pad.
20. A magnetic head gimbal assembly of claim 15, wherein the first thin film piece of piezoelectric material and the second thin film piece of piezoelectric material have matching polarities or opposing polarities.
21. A magnetic head gimbal assembly of claim 15, wherein the first thin film piece of piezoelectric material and the second thin film piece of piezoelectric material have one or more layers.
22. A magnetic head gimbal assembly of claim 21, wherein the first thin film piece and the second thin film piece include: a first layer of ductile material; a third and seventh layer of piezoelectric material above the first layer; a second, fourth, sixth, and eighth layer of thin electric material surrounding the third and seventh layers; and a fifth layer of an insulative adhesion material coupling the fourth layer to the sixth layer.
23. A magnetic disk apparatus, comprising: a disk to store information; a magnetic head to read information to and write information from the disk; a suspension to support the magnetic head, the suspension including a load beam flexible in a direction substantially perpendicular to the disk; a coarse adjustment actuator to drive said suspension; a micro-actuator for micro motion mounted in a micro-actuator mounting portion provided on said suspension; and wherein the micro-actuator having a slider support frame disposed on the suspension with a slider support to hold the slider and a swing support to support at least a horizontal swinging movement of the slider support; and a positioning controller connecting the slider support frame to control the position of the slider.
24. A magnetic disk apparatus of claim 23, wherein the slider support further comprises: a first and a second side beams disposed respectively on the both side of the slider support to couple the positioning controller to the slider support frame.
25. A magnetic disk apparatus of claim 23, wherein the swing support having: a base to couple to the suspension; and a leading beam coupling the slider support to the base to support the horizontal swinging movement of the slider support.
26. A magnetic disk apparatus of claim 25, wherein the width of the leading beam is narrower than the width of the slider support and the base.
27. A magnetic disk apparatus of claim 23, wherein the positioning controller having: a first thin film piece of piezoelectric material connecting to the first side of the slider support frame; and a second thin film piece of piezoelectric material connecting to the second side of the slider support frame.
28. A magnetic disk apparatus of claim 24, wherein the positioning controller comprises: a first thin film piece of piezoelectric material connecting to the first side beam of the slider support; and a second thin film piece of piezoelectric material connecting to the second side beam of the slider support.
29. A magnetic disk apparatus of claim 27, further comprising: a first micro-actuator electrical bonding pad electrically coupled to the first thin film piece of piezoelectric material; a second micro-actuator electrical bonding pad electrically coupled to the second thin film piece of piezoelectric material; and a micro-actuator grounding pad electrically coupled to the first thin film piece of piezoelectric material and the second thin film piece of piezoelectric material, and the suspension includes: a first suspension electrical bonding pad coupled to a first micro actuator trace; a second suspension electrical bonding pad coupled to a second micro actuator trace; and a suspension grounding pad.
30. A magnetic disk apparatus of claim 29, further comprising: an anisotropic conductive film to physically couple the first thin film piece of piezoelectric material and the second thin film piece of piezoelectric material to the suspension and to electrically couple the first micro-actuator electrical bonding pad to the first suspension electrical bonding pad, the second micro- actuator electrical bonding pad to the second suspension bonding pad, and the micro-actuator grounding pad to the suspension grounding pad.
31. A magnetic disk apparatus of claim 29, further comprising: an insulative adhesion material to physically couple the swing support to the suspension; a bonding wire to electrically couple the first micro-actuator electrical bonding pad to the first suspension electrical bonding pad, the second micro- actuator electrical bonding pad to the second suspension bonding pad, and the micro-actuator grounding pad to the suspension grounding pad.
32. A magnetic disk apparatus of claim 29, wherein the first thin film piece of piezoelectric material and the second thin film piece of piezoelectric material have matching polarities, and the first micro-actuator electrical bonding pad and the second micro-actuator bonding pad receive opposing electrical signals through the first and the second suspension electrical bonding pads.
33. A magnetic disk apparatus of claim 29, wherein the first thin film piece of piezoelectric material and the second thin film piece of piezoelectric material have opposing polarities, and the first micro-actuator electrical bonding pad and the second micro-actuator bonding pad receive synchronous electrical signals through the first and the second suspension electrical bonding pads.
34. A magnetic disk apparatus of claim 27, wherein the first thin film piece of piezoelectric material and the second thin film piece of piezoelectric material have one or more layers.
35. A magnetic disk apparatus of claim 27, wherein the first thin film piece and the second thin film piece include: a first layer of ductile material; a third and seventh layer of piezoelectric material above the first layer; a second, fourth, sixth, and eighth layer of thin electric material surrounding the third and seventh layers; and a fifth layer of an insulative adhesion material coupling the fourth layer to the sixth layer.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2003/001007 WO2005052927A1 (en) | 2003-11-27 | 2003-11-27 | Thin film piezoelectric micro-actuator for head gimbal assembly |
CNB2003801107345A CN100476954C (en) | 2003-11-27 | 2003-11-27 | Thin film piezoelectric micro-actuator for universal suspension bracket assembly of magnetic head |
US10/831,954 US7525769B2 (en) | 2003-11-27 | 2004-04-26 | Micro-actuator having swing support to allow horizontal swinging movement of slider support |
JP2004315942A JP4677762B2 (en) | 2003-11-27 | 2004-10-29 | Microactuator, head gimbal assembly including microactuator, and magnetic disk drive including head gimbal assembly |
US11/757,945 US20070230060A1 (en) | 2003-11-27 | 2007-06-04 | Thin film piezoelectric micro-actuator for head gimbal assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CN2003/001007 WO2005052927A1 (en) | 2003-11-27 | 2003-11-27 | Thin film piezoelectric micro-actuator for head gimbal assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005052927A1 true WO2005052927A1 (en) | 2005-06-09 |
Family
ID=34624421
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2003/001007 WO2005052927A1 (en) | 2003-11-27 | 2003-11-27 | Thin film piezoelectric micro-actuator for head gimbal assembly |
Country Status (4)
Country | Link |
---|---|
US (2) | US7525769B2 (en) |
JP (1) | JP4677762B2 (en) |
CN (1) | CN100476954C (en) |
WO (1) | WO2005052927A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101034555B (en) * | 2006-01-11 | 2011-01-19 | 三星电子株式会社 | Hard disk drive, suspension assembly of actuator of hard disk drive, and method of operation of hard disk drive |
Families Citing this family (38)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4433727B2 (en) * | 2003-09-02 | 2010-03-17 | Tdk株式会社 | Flexure, suspension and head gimbal assembly |
JP2007043789A (en) * | 2005-08-02 | 2007-02-15 | Shinka Jitsugyo Kk | Microactuator, head gimbal assembly using it, hard disc drive, its manufacturing method |
CN1967663A (en) * | 2005-11-16 | 2007-05-23 | 新科实业有限公司 | Film piezoelectric micro driver and head tablet pack combination and disk drive unit |
US8605389B1 (en) | 2006-06-09 | 2013-12-10 | Western Digital Technologies, Inc. | Head gimbal assembly including a conductive trace disposed upon a continuous dielectric layer segment without overlying a gimbal arm |
CN101290776B (en) * | 2007-04-17 | 2012-05-23 | 新科实业有限公司 | Cantilever part, combination of tabs of magnetic head, manufacturing method thereof, and hard disk driving unit |
US20090034128A1 (en) * | 2007-07-21 | 2009-02-05 | Vinod Sharma | Method and apparatus for independent piezoelectric excitation in the micro-actuator assemblies of a hard disk drive for improved drive reliability |
US8085508B2 (en) | 2008-03-28 | 2011-12-27 | Hitachi Global Storage Technologies Netherlands B.V. | System, method and apparatus for flexure-integrated microactuator |
US8792212B1 (en) | 2010-09-14 | 2014-07-29 | Western Digital (Fremont), Llc | Robust gimbal design for head gimbal assembly |
US8295014B1 (en) | 2010-10-29 | 2012-10-23 | Western Digital Technologies, Inc. | Disk drive head gimbal assembly having a flexure tail with transverse flying leads |
US8467153B1 (en) | 2010-10-29 | 2013-06-18 | Western Digital Technologies, Inc. | Disk drive head gimbal assembly having a flexure tail with folded bond pads |
US8477459B1 (en) | 2010-10-29 | 2013-07-02 | Western Digital Technologies, Inc. | Disk drive head gimbal assembly having a flexure tail with dual conductive layers and features to facilitate bonding |
US8295013B1 (en) | 2010-10-29 | 2012-10-23 | Western Digital Technologies, Inc. | Disk drive head stack assembly having a flexible printed circuit with heat transfer limiting features |
US8325446B1 (en) | 2010-10-29 | 2012-12-04 | Western Digital Technologies, Inc. | Disk drive head gimbal assembly having a flexure tail with features to facilitate bonding |
US9633680B2 (en) | 2010-10-29 | 2017-04-25 | Western Digital Technologies, Inc. | Head suspension having a flexure tail with a covered conductive layer and structural layer bond pads |
US8320084B1 (en) | 2010-10-29 | 2012-11-27 | Western Digital Technologies, Inc. | Disk drive head gimbal assembly having a flexure tail with features to facilitate bonding |
KR20120110820A (en) * | 2011-03-30 | 2012-10-10 | 삼성전자주식회사 | Head gimbal assembly and hard disk drive having the same |
US8593764B1 (en) | 2011-06-14 | 2013-11-26 | Western Digital Technologies, Inc. | Method for fine actuation of a head during operation of a disk drive |
US8446694B1 (en) * | 2011-06-14 | 2013-05-21 | Western Digital Technologies, Inc. | Disk drive head suspension assembly with embedded in-plane actuator at flexure tongue |
US8208224B1 (en) | 2011-08-29 | 2012-06-26 | Western Digital Technologies, Inc. | Suspension assemblies for minimizing stress on slider solder joints |
US8488281B1 (en) | 2011-09-13 | 2013-07-16 | Western Digital (Fremont), Llc | Disk drive suspension assembly having a flexure bond pad shelf separate from a tongue |
US8665566B1 (en) | 2011-12-20 | 2014-03-04 | Western Digital Technologies, Inc. | Suspension tail design for a head gimbal assembly of a hard disk drive |
US8760812B1 (en) | 2011-12-20 | 2014-06-24 | Western Digital Technologies, Inc. | Disk drive head gimbal assembly having a jumper in a flexible printed circuit overlap region |
US8451563B1 (en) | 2011-12-20 | 2013-05-28 | Western Digital (Fremont), Llc | Method for providing a side shield for a magnetic recording transducer using an air bridge |
US9046972B2 (en) | 2012-03-23 | 2015-06-02 | Nokia Technologies Oy | Structure for a tactile display |
US8980109B1 (en) | 2012-12-11 | 2015-03-17 | Western Digital (Fremont), Llc | Method for providing a magnetic recording transducer using a combined main pole and side shield CMP for a wraparound shield scheme |
US8914969B1 (en) | 2012-12-17 | 2014-12-23 | Western Digital (Fremont), Llc | Method for providing a monolithic shield for a magnetic recording transducer |
US8792213B1 (en) | 2013-02-20 | 2014-07-29 | Western Digital Technologies, Inc. | Tethered gimbal on suspension for improved flyability |
US9335950B2 (en) | 2013-03-15 | 2016-05-10 | Western Digital Technologies, Inc. | Multiple stream compression and formatting of data for data storage systems |
US9448738B2 (en) | 2013-03-15 | 2016-09-20 | Western Digital Technologies, Inc. | Compression and formatting of data for data storage systems |
US8982513B1 (en) | 2013-05-21 | 2015-03-17 | Western Digital Technologies, Inc. | Disk drive head suspension with dual piezoelectric elements adhered to rotary-actuated and non-actuated portions of a structural layer of a tongue of a laminated flexure |
US8797691B1 (en) | 2013-05-21 | 2014-08-05 | Western Digital Technologies, Inc. | Disk drive head suspension with a single piezoelectric element adhered to rotary-actuated and non-actuated portions of a structural layer of a tongue of a laminated flexure |
US9274978B2 (en) | 2013-06-10 | 2016-03-01 | Western Digital Technologies, Inc. | Migration of encrypted data for data storage systems |
JP6042310B2 (en) * | 2013-11-15 | 2016-12-14 | 株式会社東芝 | Head gimbal assembly and disk device provided with the same |
US9330695B1 (en) | 2013-12-10 | 2016-05-03 | Western Digital Technologies, Inc. | Disk drive head suspension tail with a noble metal layer disposed on a plurality of structural backing islands |
JP6018598B2 (en) | 2014-02-21 | 2016-11-02 | 株式会社東芝 | Head gimbal assembly and disk device provided with the same |
US8934199B1 (en) | 2014-03-31 | 2015-01-13 | Western Digital Technologies, Inc. | Disk drive head suspension tail with bond pad edge alignment features |
US9524738B1 (en) | 2015-06-25 | 2016-12-20 | Western Digital Technologies, Inc. | Disk drive head gimbal assembly having a flexure tail with a dielectric layer that has regions of lesser thickness |
US9792936B1 (en) | 2016-04-27 | 2017-10-17 | Seagate Technology Llc | Gimbal assembly with linear actuators that cause rotation of a slider |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5739982A (en) * | 1996-08-23 | 1998-04-14 | International Business Machines Corporation | Laser treatment of head gimbal assembly components |
US5898541A (en) * | 1996-12-04 | 1999-04-27 | Seagate Technology, Inc. | Leading surface slider microactuator |
CN1321983A (en) * | 2000-02-01 | 2001-11-14 | 松下电器产业株式会社 | Magnetic head supporting mechanism and film piezoelectric actuator |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6268983B1 (en) * | 1997-12-25 | 2001-07-31 | Matsushita Electric Industrial Co., Ltd. | Head actuator driven by piezoelectric element |
US6233124B1 (en) * | 1998-11-18 | 2001-05-15 | Seagate Technology Llc | Piezoelectric microactuator suspension assembly with improved stroke length |
US6310750B1 (en) * | 1999-10-20 | 2001-10-30 | Read-Rite Corporation | Disk drive actuator arm with microactuated read/write head positioning |
JP3441429B2 (en) * | 2000-10-20 | 2003-09-02 | 松下電器産業株式会社 | Piezoelectric actuator, method of manufacturing the same, and method of driving piezoelectric actuator |
JP3716164B2 (en) * | 2000-02-14 | 2005-11-16 | 株式会社日立グローバルストレージテクノロジーズ | Head support mechanism |
US6614627B1 (en) * | 2000-02-14 | 2003-09-02 | Hitachi, Ltd. | Magnetic disk apparatus |
JP2002141569A (en) * | 2000-08-03 | 2002-05-17 | Tokin Ceramics Corp | Micro-actuator element |
JP2002074871A (en) | 2000-08-31 | 2002-03-15 | Tdk Corp | Head gimbals assembly equipped with actuator for fine positioning, disk device equipped with head gimbals assembly, and manufacturing method for head gimbals assembly |
JP3771122B2 (en) * | 2000-09-05 | 2006-04-26 | 富士通株式会社 | Head moving device and storage disk drive device |
JP2002133803A (en) | 2000-10-31 | 2002-05-10 | Tdk Corp | Very small positioning actuator for head element, head gimbal assembly equipped with the actuator, disk device equipped with the head gimbal assembly, actuator manufacturing method, and head gimbal assembly manufacturing method |
US7177119B1 (en) * | 2000-12-05 | 2007-02-13 | Hutchinson Technology Incorporated | Microactuated head suspension with ring springs |
JP2002175675A (en) * | 2000-12-07 | 2002-06-21 | Sony Corp | Hard disk device |
JP4298911B2 (en) * | 2000-12-15 | 2009-07-22 | 日本発條株式会社 | Suspension for disk unit |
JP4237394B2 (en) * | 2000-12-27 | 2009-03-11 | 日本発條株式会社 | Suspension for disk unit |
WO2003067576A1 (en) * | 2002-02-02 | 2003-08-14 | Sae Magnetics (H.K.) Ltd. | Head gimbal assembly with precise positioning actuator for head element, disk drive apparatus with the head gimbal assembly, and manufacturing method of the head gimbal assembly |
US7218482B2 (en) * | 2004-01-26 | 2007-05-15 | Sae Magnetics (H.K.) Ltd. | Micro-actuator, head gimbal assembly and manufacturing method thereof |
US7298593B2 (en) * | 2004-10-01 | 2007-11-20 | Sae Magnetics (H.K.) Ltd. | Micro-actuator including a leading beam pivot part, head gimbal assembly and disk drive unit with the same |
-
2003
- 2003-11-27 WO PCT/CN2003/001007 patent/WO2005052927A1/en active Application Filing
- 2003-11-27 CN CNB2003801107345A patent/CN100476954C/en not_active Expired - Fee Related
-
2004
- 2004-04-26 US US10/831,954 patent/US7525769B2/en not_active Expired - Fee Related
- 2004-10-29 JP JP2004315942A patent/JP4677762B2/en not_active Expired - Fee Related
-
2007
- 2007-06-04 US US11/757,945 patent/US20070230060A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5739982A (en) * | 1996-08-23 | 1998-04-14 | International Business Machines Corporation | Laser treatment of head gimbal assembly components |
US5898541A (en) * | 1996-12-04 | 1999-04-27 | Seagate Technology, Inc. | Leading surface slider microactuator |
CN1321983A (en) * | 2000-02-01 | 2001-11-14 | 松下电器产业株式会社 | Magnetic head supporting mechanism and film piezoelectric actuator |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101034555B (en) * | 2006-01-11 | 2011-01-19 | 三星电子株式会社 | Hard disk drive, suspension assembly of actuator of hard disk drive, and method of operation of hard disk drive |
Also Published As
Publication number | Publication date |
---|---|
CN100476954C (en) | 2009-04-08 |
US20050117262A1 (en) | 2005-06-02 |
JP4677762B2 (en) | 2011-04-27 |
CN1879151A (en) | 2006-12-13 |
US20070230060A1 (en) | 2007-10-04 |
JP2005158242A (en) | 2005-06-16 |
US7525769B2 (en) | 2009-04-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7525769B2 (en) | Micro-actuator having swing support to allow horizontal swinging movement of slider support | |
US8085508B2 (en) | System, method and apparatus for flexure-integrated microactuator | |
US7551405B2 (en) | Rotational PZT micro-actuator with fine head position adjustment capacity, head gimbal assembly, and disk drive unit with same | |
US7298593B2 (en) | Micro-actuator including a leading beam pivot part, head gimbal assembly and disk drive unit with the same | |
US7099115B2 (en) | Head gimbal assembly with precise positioning actuator for head element, disk drive apparatus with the head gimbal assembly, and manufacturing method of the head gimbal assembly | |
US7359154B2 (en) | Method and apparatus for connecting a micro-actuator to driver arm suspension | |
US8446694B1 (en) | Disk drive head suspension assembly with embedded in-plane actuator at flexure tongue | |
US7408745B2 (en) | Sway-type micro-actuator with slider holding arms for a disk drive head gimbal assembly | |
US7609487B2 (en) | Thin-film PZT micro-actuator integral with suspension of head gimbal assembly, and disk drive unit with the same | |
US8130469B2 (en) | Suspension, head gimbal assembly and/or disk drive unit including outrigger with spring beams, and/or manufacturing method thereof | |
US8089728B2 (en) | Head gimbal assembly, suspension for the head gimbal assembly, and disk drive unit with the same | |
US20060098347A1 (en) | Micro-actuator, head gimbal assembly and disk drive unit with the same | |
US20060050442A1 (en) | Micro-actuator, head gimbal assembly, and disk drive unit with the same | |
US20030135985A1 (en) | Method and apparatus for the physical and electrical coupling of a hard disk micro-actuator and magnetic head to a drive arm suspension | |
US20030231434A1 (en) | Head assembly having microactuator | |
CN100545912C (en) | Be used for the flexible cable frame combination and the combination of flexible cable cantilever of disk drive | |
US7643253B2 (en) | HGA rotational micro-actuator including an s-shaped frame and method of making thereof | |
JP2006134563A (en) | Micro-actuator, head gimbal assembly, and disk drive unit | |
US7256967B2 (en) | Micro-actuator, head gimbal assembly, disk drive unit and manufacturing method thereof | |
US7535681B2 (en) | Micro-actuator including side arms having back-turned extensions, head gimbal assembly and disk drive unit with the same | |
JP2006309932A (en) | Micro actuator and head gimbal assembly and disk drive unit equipped with micro actuator |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200380110734.5 Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CN |