WO2000035015A1 - Module de circuit rf - Google Patents
Module de circuit rf Download PDFInfo
- Publication number
- WO2000035015A1 WO2000035015A1 PCT/JP1999/003236 JP9903236W WO0035015A1 WO 2000035015 A1 WO2000035015 A1 WO 2000035015A1 JP 9903236 W JP9903236 W JP 9903236W WO 0035015 A1 WO0035015 A1 WO 0035015A1
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- WO
- WIPO (PCT)
- Prior art keywords
- dielectric substrate
- dielectric
- circuit module
- circuit
- semiconductor device
- Prior art date
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- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/065—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L27/00
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Definitions
- the present invention relates to an RF circuit module, mainly used in a VHF band, a UHF band, a microwave band, and a millimeter wave band.
- FIG. 11 shows an RF circuit module disclosed in Japanese Patent Application Laid-Open No. 8-148800 as an example of a conventional RF circuit module.
- 31 is a multilayer first dielectric substrate
- 32 is a multilayer second dielectric substrate
- 33 is a via hole as a connecting member
- 34 is a first RF semiconductor device.
- a high-frequency circuit element 35 is a surface mount component as a second RF semiconductor device
- 36 is a DC line
- 37 is a ground pattern as a ground conductor
- 38 is a DC of the first dielectric substrate 31.
- a connection portion provided on the first dielectric substrate 31 for connecting the line 31a and the DC line 32a of the second dielectric substrate 32, and 39 is a cavity.
- the high-frequency circuit element 34 is mounted on the cavity 39, and the second dielectric substrate 32 is disposed on the upper surface of the cavity 39, and the ground pattern 37 on the back surface of the second dielectric substrate 32 is provided. And the via hole 33 around the cavity 39.
- the surface mount component 35 is mounted on the second dielectric substrate 32.
- the DC line 31a of the first dielectric substrate 31 and the DC line 32a of the second dielectric substrate 32 are connected at the connection 38 with the respective DC lines 31a and 32a. Are connected by overlapping.
- the cavity 39 is electrically connected by connecting the ground pattern 37 on the back surface of the second dielectric substrate 32 to the via hole 33 around the cavity 39. It can be sealed and hermetically sealed. Also, since the surface mounting component 35 can be mounted on the second dielectric substrate 32, the circuit mounting density can be increased. However, since the conventional RF circuit module is configured as described above, the high-frequency circuit element 34 mounted in the cavity 39 can be hermetically sealed, but the second dielectric substrate Since the circuit on 32 cannot be hermetically sealed, the surface mounting component 35 mounted on the second dielectric substrate 32 must be individually sealed.
- the present invention has been made to solve such a problem, and an object of the present invention is to easily apply a high-frequency circuit element, which is an RF semiconductor device, on a first dielectric substrate and a second dielectric substrate.
- the goal is to obtain an RF circuit module that can be shielded and hermetically sealed, and that can be downsized and have high performance. Disclosure of the invention
- An RF circuit module includes a multilayer first dielectric substrate in which a cavity surrounded by a wall is formed in an upper layer, and a first RF semiconductor mounted in the cavity on a first dielectric substrate.
- a second dielectric substrate connected to the first dielectric substrate on the upper surface of the wall and having a ground conductor on the back surface, and a second dielectric substrate mounted on the upper surface of the second dielectric substrate.
- the second RF semiconductor device and the second dielectric substrate and the second RF semiconductor device are covered, and are connected to the first dielectric substrate by a wall.
- a metal force member for hermetically sealing the first and second RF semiconductor devices.
- the RF circuit module according to the present invention is characterized in that the first dielectric substrate includes a dielectric surrounding the second dielectric substrate, and the metal cover has a plate shape.
- the RF circuit module is enclosed in a wall on the first surface, has a first dielectric circuit board having wired cavities, and is mounted in the cavity of the first dielectric circuit board.
- the first RF semiconductor device and the first dielectric A second dielectric circuit board mounted on a wall of the circuit board; a second RF semiconductor device mounted on the second dielectric circuit board; and a second dielectric circuit board mounted on the second surface of the first dielectric circuit board.
- the wall may include an extension part that forms a second cavity that surrounds and accommodates the second dielectric substrate and the second RF semiconductor device, and the metal cover may have a flat plate shape.
- the RF circuit module according to the present invention is characterized in that the first dielectric substrate is a high-temperature fired substrate and the second dielectric substrate is a low-temperature fired substrate.
- the RF circuit module according to the present invention is characterized in that the first dielectric substrate and the second dielectric substrate are connected by solder bumps. Further, the RF circuit module according to the present invention is characterized in that the first dielectric substrate and the second dielectric substrate are connected by an anisotropic conductive sheet.
- the RF circuit module according to the present invention includes a high-frequency circuit device outside the metal cover and mounted on the first dielectric substrate, which does not need to be hermetically sealed. Things.
- the RF circuit module according to the present invention is characterized in that the first dielectric substrate has a stepped portion for mounting a high-frequency circuit device.
- the RF circuit module according to the present invention is characterized in that the first dielectric substrate includes a metal base, and a metal pace is exposed on a bottom surface of the cavity.
- the RF circuit module includes a transmission system circuit on the first dielectric substrate.
- the circuit is characterized in that the receiving circuit is mounted on the second dielectric substrate.
- FIG. 1 is an assembly diagram showing a configuration of an RF circuit module according to Embodiment 1 of the present invention.
- FIG. 2 is a sectional view showing an RF circuit module according to Embodiment 1 of the present invention.
- FIG. 3 is a sectional view showing an RF circuit module according to Embodiment 2 of the present invention.
- FIG. 4 is a sectional view showing an RF circuit module according to Embodiment 3 of the present invention.
- FIG. 5 is a sectional view showing an RF circuit module according to Embodiment 4 of the present invention.
- FIG. 6 is a sectional view showing an RF circuit module according to Embodiment 5 of the present invention.
- FIG. 7 is a sectional view showing an RF circuit module according to Embodiment 6 of the present invention.
- FIG. 8 is a sectional view showing an RF circuit module according to Embodiment 7 of the present invention.
- FIG. 9 is a sectional view showing an RF circuit module according to Embodiment 8 of the present invention.
- FIG. 10 is a circuit configuration diagram showing a circuit of an RF circuit module according to Em
- FIG. 11 is a sectional view showing a conventional RF circuit module. BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1 1.
- FIG. 1 is an assembly diagram showing a configuration of an RF circuit module 100 according to an embodiment of the present invention
- FIG. 2 is a cross-sectional view showing the RF circuit module 100.
- a first dielectric substrate 1 made of a multilayer dielectric made of ceramic has a first surface as an upper surface and a second surface as a lower surface, and a conductive material is formed on the second surface.
- a flat metal base 11 is provided.
- the cavity 4 is formed in the first dielectric substrate 1 by partially removing the dielectric from the middle layer to the upper layer while leaving the portion laminated on the metal paste 11. ing.
- the first around the cavity 4 is to surround the cavity 4.
- a wall 3, which is a wall made of the dielectric substrate 1, is formed.
- the wall 3 is provided with a large number of via holes 13 extending from the metal base 11 at the bottom to the upper end of the wall 3 over the entire circumference.
- a first RF semiconductor device 19 is mounted on the first dielectric substrate 1, and a DC line 17 provided on the first dielectric substrate 1 in the cavity 4 is provided.
- the first RF semiconductor device 19 is electrically connected by a wire 10.
- a multilayer second dielectric substrate 2 having a ground conductor 5 at the bottom, which is the back surface, is placed and connected.
- a DC line 27 is provided on the second dielectric substrate 2, and is electrically connected to a DC line 17 of the first dielectric substrate 1 via a via hole 8 as a connecting material.
- the second RF semiconductor device 29 is also mounted on the second dielectric substrate 2, and the DC line 27 and the second RF semiconductor device 29 provided on the second dielectric substrate 2 are connected to each other. Are electrically connected by wire 20.
- the first and second dielectric substrates 1 and 2 are the first and second dielectric circuit substrates.
- the metal force par 12 is fixed to the upper surface of the wall 3 with a conductive adhesive or the like on the first dielectric substrate 1 at its end 12a, and the wall 3 of the first dielectric substrate 1 Are electrically connected to a large number of via holes 13 connected to the metal base 11.
- the first and second RF semiconductor devices 19 and 29 are electrically shielded by a metal pace 11, via holes 13 and metal force pars 12 electrically connected to each other, and The first and second RF semiconductor devices 19 and 29 are sealed by first and second dielectric substrates 1 and 2 and a metal cover 12 hermetically sealed to each other.
- the RF circuit module 100 is assembled by mounting a second RF semiconductor device 29 on a first dielectric substrate 1 on which a first RF semiconductor device 19 is mounted. After mounting and connecting the mounted second dielectric substrate 2, the metal cover 12 is connected to the first dielectric substrate 1.
- the RF circuit module 100 in this embodiment is configured as described above, and the first dielectric substrate 1 on which the first RF semiconductor device 19 is mounted and the second RF semiconductor device 29 are mounted.
- the first dielectric substrate 1 is sealed and bonded to the upper surface of the wall 3, and the cavities 4 around the second dielectric substrate 2 are laminated. Since the first RF semiconductor device 19 and the second RF semiconductor device 29 are electrically shielded at the same time as being electrically connected to the metal base 11 via the via hole 13 of Hermetically sealed.
- Embodiment 2 Embodiment 2
- FIG. 3 is a sectional view showing an RF circuit module 200 according to another embodiment of the present invention.
- the same or equivalent members and portions as those in FIGS. 1 and 2 are denoted by the same reference numerals, and overlapping description will be omitted.
- the difference between the RF circuit module 2000 of FIG. 3 and the RF circuit module 100 of FIG. 1 is that the ceramic is formed on the wall 3 of the first dielectric substrate 1 and corresponds to the via holes 13. It has a large number of electrically connected via holes, and has an extension 1a that forms a second cavity that surrounds and accommodates the second dielectric substrate 2 and the second RF semiconductor device 29. And that the metal cover 1 1 2 is a flat plate. Other configurations are the same.
- an extension 1 a is formed so as to surround the second dielectric substrate 2.
- a metal cover 112 is provided on the extension 1a, and is connected to the extension 1a using a conductive adhesive or the like. Inside the extension l a, a via hole 13 is provided so as to extend, and the metal base 11 and the metal cover 112 are electrically connected.
- FIG. 4 is a cross-sectional view showing an RF circuit module 300 according to another embodiment of the present invention.
- the materials of the first dielectric substrate 101 and the second dielectric substrate 102 are different from those of FIG.
- the first dielectric substrate 101 is a multi-layer high-temperature fired substrate, and uses high thermal conductivity, for example, aluminum nitride as a substrate material.
- the second dielectric substrate 102 is a multilayer low-temperature fired substrate.
- a low-temperature fired substrate is fired at a lower temperature than a normal substrate. Since the firing temperature is low, a material having a low melting point such as gold or copper can be used as a wiring material for wiring to the substrate.
- the RF circuit module 300 in this embodiment has the same advantages as the RF circuit module shown in FIGS. 1 and 2 and also has a high thermal conductivity of the high-temperature fired substrate. Even if a device that generates a large amount of heat is used as the RF semiconductor device 19 mounted on the dielectric substrate 101, heat can be easily dissipated.
- a low-temperature fired substrate is used for the second dielectric substrate 102, gold or copper wiring material can be used for the DC line 27 of the second dielectric substrate 102. Since the resistivity is low, the electric resistance of the DC line 27 can be reduced. Therefore, a voltage drop due to the DC line 27 of the second dielectric substrate 102 can be suppressed.
- FIG. 5 is a cross-sectional view showing an RF circuit module 400 according to another embodiment of the present invention.
- solder bumps 118 are inserted between the first dielectric substrate 1 and the second dielectric substrate 2.
- a solder bump 118 as a pole-shaped solder is inserted between the upper surface of the wall 3 of the first dielectric substrate 1 and the ground conductor 5 on the back surface of the second dielectric substrate 2.
- the RF circuit module 400 in this embodiment has the same advantages as the RF circuit module shown in FIGS. 1 and 2, and furthermore, has the DC line 17 of the first dielectric substrate 1
- the connection between the second dielectric substrate 2 and the DC line 27 and the connection between the first dielectric substrate 1 and the ground conductor 5 of the second dielectric substrate 2 are performed via the via holes 8 and the solder bumps 1 18. Therefore, the size of the RF circuit module can be reduced as compared with a case where a connection portion where the DC lines 17 and 27 are overlapped is processed.
- Embodiment 5 Embodiment 5
- FIG. 6 is a cross-sectional view showing an RF circuit module 500 according to another embodiment of the present invention.
- the drawing differs from FIG. 2 in that an anisotropic conductive sheet 119 is inserted between a first dielectric substrate 1 and a second dielectric substrate 2.
- the anisotropic conductive sheet has different properties depending on the direction of the sheet material, and facilitates the movement of the conductive particles in the direction in which the first dielectric substrate 1 and the second dielectric substrate 2 face each other. The conductivity is increased.
- the RF circuit module 500 of this embodiment has the same advantages as the RF circuit module shown in FIG. 5, and also has the DC line 17 of the first dielectric substrate 1 and the second dielectric
- the connection between the substrate 2 and the DC line 27 and the connection between the first dielectric substrate 1 and the ground conductor 5 of the second dielectric substrate 2 are performed via the anisotropic conductive sheet 119. Since solder reflow is not required to connect the first dielectric substrate 1 and the second dielectric substrate 2, the assembly workability is improved, and the second dielectric substrate 2 Replacement work becomes easier.
- FIG. 7 is a sectional view showing an RF circuit module 600 according to another embodiment of the present invention.
- the figure differs from FIG. 2 in that a high-frequency circuit device 120 such as a chip capacitor, which does not need to be hermetically sealed, is disposed on the first dielectric substrate 1 outside the metal force member 12.
- the RF circuit module 600 in this embodiment has the same advantages as the RF circuit module shown in FIG. 2 and can reduce the area occupied by the cavity 4, thereby reducing the unnecessary waveguide mode. Control becomes easy. That is, since the metal pace 11, the via hole 13, and the ground conductor 5 are provided around the cavity 4, a structure like a waveguide that is approximately surrounded by metal walls on all sides is formed. Therefore, if a high-frequency circuit device 120 that does not need to be hermetically sealed, such as a chip capacitor, is placed in the cavity 4, the area occupied by the cavity 4 becomes large, and the approximate width of the waveguide becomes large. Lower frequency Unnecessary waveguide modes that propagate radio waves (long wavelength) are likely to occur. However, by locating the high-frequency circuit device 120 that does not need to be hermetically sealed outside the metal cover 112, the area occupied by the cavity 4 can be reduced, and unnecessary waveguide modes are suppressed. Becomes easier. Embodiment 7
- FIG. 8 is a sectional view showing an RF circuit module 700 according to another embodiment of the present invention.
- the shape of the part of the first dielectric substrate 201 on which the high-frequency circuit device 120 is mounted is different from that of FIG.
- the dielectric is partially removed from the middle layer to the upper layer outside the metal cover 12 to form a stepped portion 201a.
- the RF circuit module 700 in this embodiment has the same advantages as the RF circuit module shown in FIG. 7, and the high-frequency circuit device 120 that does not need to be hermetically sealed such as a chip capacitor is Since the high-frequency circuit device 120 can be arranged outside the metal cover 12 at a position where the height of the first dielectric substrate 201 is reduced, the entire RF circuit module 700 can be arranged. The height can be reduced.
- FIG. 9 is a sectional view showing an RF circuit module 800 according to another embodiment of the present invention.
- the shape of the portion of the first dielectric substrate 301 on which the RF semiconductor device 19 is mounted is different from that in FIG.
- a part of the first dielectric substrate 301 is removed from the lower layer to the upper layer to expose the metal pace 11 on the bottom surface of the cavity 4, and the first RF semiconductor is placed on the metal pace 11 in the cavity 4.
- Device 19 is implemented.
- the RF circuit module 800 in this embodiment is shown in FIG.
- the first RF semiconductor device 19 is mounted on the metal base 11 with good thermal conductivity, so that the first RF semiconductor device 19 Heat is easily dissipated.
- FIG. 10 is a circuit configuration diagram showing a circuit of an RF circuit module according to another embodiment of the present invention.
- 1 2 1 is a switch
- 1 2 2 is a high power amplifier
- 1 2 3 is a low noise amplifier
- 1 2 4 is a transmission system circuit
- 1 2 5 is a reception system circuit
- 1 2 6 is an 11? Line
- 1 Reference numeral 27 denotes a DC line
- reference numeral 128 denotes a control circuit side terminal
- reference numeral 129 denotes an antenna side terminal
- reference numeral 130 denotes an input / output terminal.
- the high-power amplifier 122 shown in FIG. are mounted on the first dielectric substrate 1.
- the receiving system circuit 125 including the low noise amplifier 123 is mounted on the second dielectric substrate 2.
- a DC line 17 for controlling the high-power amplifier 122 of the transmission circuit 124 is connected to a DC line 27 for controlling the noise amplifier 123 of the reception circuit 125. Then, it is connected to the control circuit side terminal 128 through the second dielectric substrate 2.
- the antenna terminal 129 and the input / output terminal 130 are connected via the first dielectric substrate 1.
- the RF circuit module in this embodiment is separately mounted for each of the transmission system circuit 124 and the reception system circuit 125, the circuit configuration of the RF circuit module can be simplified.
- a metal force member connected to the dielectric substrate for electrically shielding the second RF semiconductor device and hermetically sealing the first and second RF semiconductor devices.
- the RF circuit module of the present invention has a first dielectric circuit board surrounded by a wall on the first surface and having wired cavities, and is mounted in the cavity of the first dielectric circuit board.
- a plurality of buried conductors arranged so as to surround the second dielectric substrate and the second RF semiconductor device, which are sealed and adhered to the first dielectric circuit board. Electrically connected to the buried conductor, and thus the first and second A metal force par for electrically shielding the RF semiconductor devices of the first and second RF semiconductor devices and for hermetically sealing the first and second RF semiconductor devices.
- the RF semiconductor devices on the first dielectric substrate and the second dielectric substrate can be easily electrically shielded and hermetically sealed, thereby realizing miniaturization and high performance.
- RF circuit module can be provided.
- the first dielectric substrate includes the dielectric surrounding the second dielectric substrate, and the metal cover has a plate shape.
- the wall is provided with an extension forming a second cavity surrounding and accommodating the second dielectric substrate and the second RF semiconductor device, and the metal cover is flat, so that the metal cover is attached. Workability is improved.
- the thermal conductivity is good.
- the second dielectric substrate is a low-temperature fired substrate, a material having a low melting point and low electric resistance is used as a wiring material for the substrate. It can be used and voltage drop can be suppressed.
- the first dielectric substrate and the second dielectric substrate are connected by the solder bumps, the first dielectric substrate and the second dielectric substrate Connection can be made with a simple structure, and the RF circuit module can be further miniaturized.
- the RF circuit module of the present invention since the first dielectric substrate and the second dielectric substrate are connected by the anisotropic conductive sheet, the first dielectric substrate and the second dielectric substrate are connected to each other. No solder reflow is required to connect the two dielectric substrates 2, thereby improving the workability of assembly. In addition, the work of replacing the second dielectric substrate becomes easy. Further, according to the RF circuit module of the present invention, since the high-frequency circuit device that does not need to be hermetically sealed is mounted on the first dielectric substrate outside the metal force par, the cavity is reduced. Occupied area can be reduced, and unnecessary waveguide modes can be suppressed.
- the first dielectric substrate includes the stepped portion on which the high-frequency circuit device is mounted, the height of the entire RF circuit module can be reduced.
- the first dielectric substrate includes the metal base and the metal base is exposed on the bottom surface of the cavity. It can be mounted directly on a semiconductor device, improving heat dissipation from the first RF semiconductor device.
- the transmission circuit is mounted on the first dielectric substrate, and the reception circuit is mounted on the second dielectric substrate.
- the configuration becomes easy.
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99973352A EP1056133A1 (en) | 1998-12-09 | 1999-06-17 | Rf circuit module |
KR1020007008694A KR20010040800A (ko) | 1998-12-09 | 1999-06-17 | 알에프 회로 모듈 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP35026598A JP3538045B2 (ja) | 1998-12-09 | 1998-12-09 | Rf回路モジュール |
JP10/350265 | 1998-12-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000035015A1 true WO2000035015A1 (fr) | 2000-06-15 |
Family
ID=18409339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/003236 WO2000035015A1 (fr) | 1998-12-09 | 1999-06-17 | Module de circuit rf |
Country Status (6)
Country | Link |
---|---|
US (1) | US6335669B1 (ja) |
EP (1) | EP1056133A1 (ja) |
JP (1) | JP3538045B2 (ja) |
KR (1) | KR20010040800A (ja) |
CN (1) | CN1296642A (ja) |
WO (1) | WO2000035015A1 (ja) |
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- 1999-06-17 KR KR1020007008694A patent/KR20010040800A/ko not_active Application Discontinuation
- 1999-06-17 WO PCT/JP1999/003236 patent/WO2000035015A1/ja not_active Application Discontinuation
- 1999-06-17 EP EP99973352A patent/EP1056133A1/en not_active Withdrawn
- 1999-06-17 CN CN99804934A patent/CN1296642A/zh active Pending
- 1999-07-27 US US09/361,213 patent/US6335669B1/en not_active Expired - Lifetime
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Also Published As
Publication number | Publication date |
---|---|
JP2000174204A (ja) | 2000-06-23 |
EP1056133A1 (en) | 2000-11-29 |
KR20010040800A (ko) | 2001-05-15 |
JP3538045B2 (ja) | 2004-06-14 |
CN1296642A (zh) | 2001-05-23 |
US6335669B1 (en) | 2002-01-01 |
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