WO2002038841A2 - Atomic layer doping apparatus and method - Google Patents
Atomic layer doping apparatus and method Download PDFInfo
- Publication number
- WO2002038841A2 WO2002038841A2 PCT/US2001/026079 US0126079W WO0238841A2 WO 2002038841 A2 WO2002038841 A2 WO 2002038841A2 US 0126079 W US0126079 W US 0126079W WO 0238841 A2 WO0238841 A2 WO 0238841A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- doping
- wafer
- regions
- region
- substrate
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/20—Deposition of semiconductor materials on a substrate, e.g. epitaxial growth solid phase epitaxy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67155—Apparatus for manufacturing or treating in a plurality of work-stations
- H01L21/67161—Apparatus for manufacturing or treating in a plurality of work-stations characterized by the layout of the process chambers
- H01L21/67167—Apparatus for manufacturing or treating in a plurality of work-stations characterized by the layout of the process chambers surrounding a central transfer chamber
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/22—Diffusion of impurity materials, e.g. doping materials, electrode materials, into or out of a semiconductor body, or between semiconductor regions; Interactions between two or more impurities; Redistribution of impurities
- H01L21/225—Diffusion of impurity materials, e.g. doping materials, electrode materials, into or out of a semiconductor body, or between semiconductor regions; Interactions between two or more impurities; Redistribution of impurities using diffusion into or out of a solid from or into a solid phase, e.g. a doped oxide layer
- H01L21/2251—Diffusion into or out of group IV semiconductors
- H01L21/2254—Diffusion into or out of group IV semiconductors from or through or into an applied layer, e.g. photoresist, nitrides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67155—Apparatus for manufacturing or treating in a plurality of work-stations
- H01L21/6719—Apparatus for manufacturing or treating in a plurality of work-stations characterized by the construction of the processing chambers, e.g. modular processing chambers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67155—Apparatus for manufacturing or treating in a plurality of work-stations
- H01L21/67207—Apparatus for manufacturing or treating in a plurality of work-stations comprising a chamber adapted to a particular process
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67155—Apparatus for manufacturing or treating in a plurality of work-stations
- H01L21/67207—Apparatus for manufacturing or treating in a plurality of work-stations comprising a chamber adapted to a particular process
- H01L21/67213—Apparatus for manufacturing or treating in a plurality of work-stations comprising a chamber adapted to a particular process comprising at least one ion or electron beam chamber
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
- H01L21/67739—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations into and out of processing chamber
- H01L21/67745—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations into and out of processing chamber characterized by movements or sequence of movements of transfer devices
Definitions
- the present invention relates to the field of semiconductor integrated circuits and, in particular, to an improved method for doping wafers.
- Doping by thermal diffusion is a two-step process ' .
- the first step In the first step,
- the semiconductor is either exposed to a gas stream
- a dopant is diffused into a t-hin surface layer from
- predeposition step is followed by the drive-in step, during which the
- the dopant in the thin surface layer of the semiconductor is diffused into the interior of the semiconductor, and thus the predeposited dopant atoms are
- Ion implantation is preferred over thermal diffusion because of the
- ion implantation process employs ionized-projectile atoms that are introduced
- implant system uses a gas source of dopant, such as, BF 3 , PF 3 , SbF 3 , or AsH 3 ,
- An analyzer magnet selects only the ion species of
- doping atoms are not electrically active right after implantation mainly because
- the dopant atoms do not end up on regular, active lattice sites.
- Ion channeling is another drawback of ion implantation that could
- dopant atoms gather in the channels of the major axis. Ion channeling can be
- wafer 3 to 7° off the major axis prevents the dopant ions from entering the
- dopants still redistribute during the course of further processing. For example,
- the present invention provides an improved method and unique
- invention contemplates an apparatus provided with multiple doping regions in
- ALD layer deposition
- Each doping region is formed by thermal reaction, for example, into the wafer surface.
- a robot is programmed to follow pre-defined
- each region depositing only one
- Each wafer can be moved through the cycle of regions until a desired
- the present invention allows for the atomic layer doping of wafers
- region may be provided with a pre-determined set of processing conditions
- Figure 1 illustrates a schematic top view of a multiple-chamber
- Figure 2 is a partial cross-sectional view of the atomic layer doping
- Figure 3 is a partial cross-sectional view of the atomic layer doping
- Figure 4 is a partial cross-sectional view of the atomic layer doping
- Figure 5 is a schematic top view of a multiple-chamber atomic layer
- substrate used in the following description may include
- semiconductor need not be silicon-based.
- the semiconductor could be silicon- germanium, germanium, or gallium arsenide.
- dopant is intended to include not only elemental dopant
- p-type dopant used in the following description may include any p-
- type impurity ions such as zinc (Zn), magnesium (Mg), beryllium (Be), boron
- n-type impurity ions such as silicon (Si), sulfur (S), tin (Sn),
- P phosphorus
- As arsenic
- Sb antimony
- the present invention provides an atomic layer doping method
- the apparatus is configured to:
- each of the monolayer species are diffused into respective substrates.
- doping region is chemically separated from the adjacent doping regions.
- the present invention provides a simple and novel multi-chamber
- 52a, 52b, 54a, and 54b are alternately positioned around a loading mechanism
- These doping regions may be any regions for the
- the doping regions may be
- chambers are arranged in pairs 50a, 50b; 52a, 52b; 54a, 54b.
- One such pair, 50a, 50b is shown in Figure 2. While one of the reactor chambers of a pair, for
- example 50a deposits one monolayer of the dopant species Ax, the other
- reactor chamber of the pair for example 50b, facilitates subsequent diffusion of
- the adjacent reactor chamber pairs are chemically isolated from one another,
- a respective region for example 50a, and which allows wafers treated in one
- reaction chamber for example 50a, to be easily transported by the robot 60 to
- the paired reaction chambers show a wall through
- barrier preventing the gas mixture within one chamber, for example 50a, from
- the robot can simply move wafers back and forth
- one or more additional chambers for example 50c, 52c, 54c, may also be used for doping of a substrate using monolayers of dopant species Ax.
- chambers for depositing the Ax species are chemically isolated.
- the loading assembly 60 of Figure 1 may include an elevator
- the supply mechanism may be further provided with clamps and pivot arms, so
- a wafer 55 can be maneuvered by the robot and positioned according to
- doping on a wafer 55 begins by selectively moving a first wafer 55, from the
- a second wafer 55' may be selectively moved by the
- a third wafer 55" is also selectively moved by the loading assembly 60
- chambers 50a, 52a, 54a are ready for atomic layer deposition of a monolayer of
- Figure 2 illustrates a cross-sectional view of the apparatus 100 of
- Figure 1 taken along line 2-2'.
- Figure 2 shows only a cross-
- the wafer 55 is placed inside of the
- reactor chamber 50a which may be provided as a quartz or aluminum
- an exhaust system 182a is situated on the opposite wall from the dopant gas
- the wafer 55 is positioned on top of the suscepter 140a ( Figure 2)
- dopant gas precursor Ax flows at a right angle onto the wafer 55 and reacts
- dopants are hydrated forms of dopant atoms such as arsine (AsH 3 ) and
- containers such as the dopant gas supply source 162a ( Figure 2), and
- liquid source of dopant such as chlorinated or
- brorninated compounds of the desired element may be used.
- boron liquid source for example boron tribromide
- phosphorous liquid source for example phosphorous oxychloride
- the inert gas carries the dopant vapors
- reaction gas A reaction gas
- reaction gas is oxygen, which creates the boron trioxide (B 2 0 3 )
- the wafer 55 is moved from the reactor chamber 50a, through a gas
- the loading assembly 60 moves the wafer 55 through the gas
- a heater assembly 150b is positioned under the
- the heat from the heater assembly 150b drives the dopant atoms into the
- the depth of the doped region 210b of the wafer 55 is
- dopants form the monolayers of dopant species into the wafers.
- a plasma of a non-reactive gas may be used to
- a supply inlet 160b ( Figure 2), which is further
- a non-reactive gas supply source 162b for the plasma of the non- reactive gas, is mounted on the upper wall of the reactor chamber 50b.
- exhaust inlet 180b connected to an exhaust system 182b, is further situated on
- annealing can be achieved by a thermal heating step.
- the anneal step could be any suitable anneal temperature.
- the anneal step could be any suitable anneal temperature.
- the anneal step may take place
- reactor chamber 52a into an adjacent reactor chamber, for example reactor chamber 52a, depending
- reactor chamber 50a allows, for example, reactor chamber 50a to be set to a
- reactor chamber may be optimized either for improved chemisorption
- reactor chamber accommodates only one dopant species, ciOss-contamination from one wafer to another is greatly reduced. Moreover, the production time
- chambers 50a, 50b could also process another first substrate 55, in a direction
- substrate 55 could travel in the opposite direction of arrow B l5 that is from the
- the wafer 55 is further moved to the reactor chamber 50b for the
- any other type of doping regions may be employed, as long as the
- the gas curtain 300 is provided between the two
- nitrogen, argon, or helium flows through an inlet 260 connected
- first dopant gas Ax and the non-reactive gas By from flowing into adjacent
- An exhaust outlet 382 ( Figure 2) is further situated on the
- Figure 3 illustrates a cross-sectional view of the apparatus 100 of
- inert gas 360 shares the exhaust outlets 180a and 180b with the two doping
- the inert gas 360 of the gas curtain 300 could be designed so that the inert gas 360 of the gas curtain 300 could be
- FIG. 4 shows another alternate embodiment of the apparatus in
- a physical boundary such as a wall 170 having a closeable opening
- a door 174 ( Figure 4) can be used to open and close the opening 172
- the wafer 55 can be
- the wafer 55 will be transported
- each wafer could be rotated and moved in one
- reaction chamber for example 50a, can serve as the initial chamber and
- Each wafer 55 is
- invention contemplates the processing of any "n" number of wafers in
- reaction chambers could process simultaneously up to 6 wafers.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002541151A JP2004513525A (en) | 2000-08-31 | 2001-08-22 | Atomic layer doping apparatus and method |
AU2002236430A AU2002236430A1 (en) | 2000-08-31 | 2001-08-22 | Atomic layer doping apparatus and method |
AT01985952T ATE282101T1 (en) | 2000-08-31 | 2001-08-22 | DEVICE AND METHOD FOR DOPPING ATOMIC LAYERS |
DE60107111T DE60107111T2 (en) | 2000-08-31 | 2001-08-22 | DEVICE AND METHOD FOR DOPING ATOMIC LAYERS |
KR1020037003141A KR100564977B1 (en) | 2000-08-31 | 2001-08-22 | Atomic layer doping apparatus and method |
EP01985952A EP1335998B1 (en) | 2000-08-31 | 2001-08-22 | Atomic layer doping apparatus and method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/653,553 | 2000-08-31 | ||
US09/653,553 US6541353B1 (en) | 2000-08-31 | 2000-08-31 | Atomic layer doping apparatus and method |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2002038841A2 true WO2002038841A2 (en) | 2002-05-16 |
WO2002038841A3 WO2002038841A3 (en) | 2003-05-01 |
Family
ID=24621343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/026079 WO2002038841A2 (en) | 2000-08-31 | 2001-08-22 | Atomic layer doping apparatus and method |
Country Status (9)
Country | Link |
---|---|
US (3) | US6541353B1 (en) |
EP (1) | EP1335998B1 (en) |
JP (1) | JP2004513525A (en) |
KR (1) | KR100564977B1 (en) |
CN (1) | CN1267589C (en) |
AT (1) | ATE282101T1 (en) |
AU (1) | AU2002236430A1 (en) |
DE (1) | DE60107111T2 (en) |
WO (1) | WO2002038841A2 (en) |
Cited By (1)
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WO2003081633A2 (en) * | 2002-03-18 | 2003-10-02 | Applied Materials, Inc. | Tandem etch chamber plasma processing system |
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Also Published As
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EP1335998B1 (en) | 2004-11-10 |
EP1335998A2 (en) | 2003-08-20 |
DE60107111D1 (en) | 2004-12-16 |
WO2002038841A3 (en) | 2003-05-01 |
CN1267589C (en) | 2006-08-02 |
US6541353B1 (en) | 2003-04-01 |
AU2002236430A1 (en) | 2002-05-21 |
US20020046705A1 (en) | 2002-04-25 |
JP2004513525A (en) | 2004-04-30 |
US6746934B2 (en) | 2004-06-08 |
ATE282101T1 (en) | 2004-11-15 |
CN1468329A (en) | 2004-01-14 |
US20030073318A1 (en) | 2003-04-17 |
DE60107111T2 (en) | 2005-10-20 |
KR100564977B1 (en) | 2006-03-28 |
KR20030064395A (en) | 2003-07-31 |
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