WO2022135403A1 - 半导体器件的外延结构、器件及外延结构的制备方法 - Google Patents
半导体器件的外延结构、器件及外延结构的制备方法 Download PDFInfo
- Publication number
- WO2022135403A1 WO2022135403A1 PCT/CN2021/140112 CN2021140112W WO2022135403A1 WO 2022135403 A1 WO2022135403 A1 WO 2022135403A1 CN 2021140112 W CN2021140112 W CN 2021140112W WO 2022135403 A1 WO2022135403 A1 WO 2022135403A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- buffer layer
- layer
- impurity concentration
- iron
- epitaxial structure
- Prior art date
Links
- 239000004065 semiconductor Substances 0.000 title claims abstract description 72
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 223
- 239000012535 impurity Substances 0.000 claims abstract description 178
- 229910052742 iron Inorganic materials 0.000 claims abstract description 111
- 239000000758 substrate Substances 0.000 claims abstract description 47
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 74
- 229910052799 carbon Inorganic materials 0.000 claims description 74
- 230000006911 nucleation Effects 0.000 claims description 22
- 238000010899 nucleation Methods 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 20
- 239000013078 crystal Substances 0.000 abstract description 25
- 230000000694 effects Effects 0.000 description 15
- 239000000463 material Substances 0.000 description 15
- 230000004888 barrier function Effects 0.000 description 14
- 229910002601 GaN Inorganic materials 0.000 description 10
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 10
- 239000000370 acceptor Substances 0.000 description 6
- 230000005533 two-dimensional electron gas Effects 0.000 description 4
- 208000032750 Device leakage Diseases 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000407 epitaxy Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910002704 AlGaN Inorganic materials 0.000 description 1
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 1
- GPXJNWSHGFTCBW-UHFFFAOYSA-N Indium phosphide Chemical compound [In]#P GPXJNWSHGFTCBW-UHFFFAOYSA-N 0.000 description 1
- RNQKDQAVIXDKAG-UHFFFAOYSA-N aluminum gallium Chemical compound [Al].[Ga] RNQKDQAVIXDKAG-UHFFFAOYSA-N 0.000 description 1
- AJGDITRVXRPLBY-UHFFFAOYSA-N aluminum indium Chemical compound [Al].[In] AJGDITRVXRPLBY-UHFFFAOYSA-N 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000005516 deep trap Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000005036 potential barrier Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/0603—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions
- H01L29/0607—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration
- H01L29/0638—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by particular constructional design considerations, e.g. for preventing surface leakage, for controlling electric field concentration or for internal isolations regions for preventing surface leakage or controlling electric field concentration for preventing surface leakage due to surface inversion layer, e.g. with channel stopper
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/0684—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions characterised by the shape, relative sizes or dispositions of the semiconductor regions or junctions between the regions
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B25/00—Single-crystal growth by chemical reaction of reactive gases, e.g. chemical vapour-deposition growth
- C30B25/02—Epitaxial-layer growth
- C30B25/18—Epitaxial-layer growth characterised by the substrate
- C30B25/183—Epitaxial-layer growth characterised by the substrate being provided with a buffer layer, e.g. a lattice matching layer
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/40—AIIIBV compounds wherein A is B, Al, Ga, In or Tl and B is N, P, As, Sb or Bi
- C30B29/403—AIII-nitrides
- C30B29/406—Gallium nitride
-
- 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
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02436—Intermediate layers between substrates and deposited layers
- H01L21/02439—Materials
- H01L21/02455—Group 13/15 materials
- H01L21/02458—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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02436—Intermediate layers between substrates and deposited layers
- H01L21/02494—Structure
- H01L21/02496—Layer structure
- H01L21/02505—Layer structure consisting of more than two layers
-
- 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
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/02521—Materials
- H01L21/02538—Group 13/15 materials
- H01L21/0254—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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/0257—Doping during depositing
- H01L21/02573—Conductivity type
- H01L21/02579—P-type
-
- 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
- H01L21/02104—Forming layers
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/0257—Doping during depositing
- H01L21/02573—Conductivity type
- H01L21/02581—Transition metal or rare earth elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/10—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions with semiconductor regions connected to an electrode not carrying current to be rectified, amplified or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
- H01L29/107—Substrate region of field-effect devices
- H01L29/1075—Substrate region of field-effect devices of field-effect transistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/20—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only AIIIBV compounds
- H01L29/2003—Nitride compounds
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/20—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only AIIIBV compounds
- H01L29/207—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only AIIIBV compounds further characterised by the doping material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/36—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the concentration or distribution of impurities in the bulk material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66446—Unipolar field-effect transistors with an active layer made of a group 13/15 material, e.g. group 13/15 velocity modulation transistor [VMT], group 13/15 negative resistance FET [NERFET]
- H01L29/66462—Unipolar field-effect transistors with an active layer made of a group 13/15 material, e.g. group 13/15 velocity modulation transistor [VMT], group 13/15 negative resistance FET [NERFET] with a heterojunction interface channel or gate, e.g. HFET, HIGFET, SISFET, HJFET, HEMT
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/778—Field effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT ; with two-dimensional charge-carrier layer formed at a heterojunction interface
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/778—Field effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT ; with two-dimensional charge-carrier layer formed at a heterojunction interface
- H01L29/7786—Field effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT ; with two-dimensional charge-carrier layer formed at a heterojunction interface with direct single heterostructure, i.e. with wide bandgap layer formed on top of active layer, e.g. direct single heterostructure MIS-like HEMT
Definitions
- the present disclosure relates to the field of semiconductor technology, and in particular, to an epitaxial structure of a semiconductor device, a device and a method for preparing the epitaxial structure.
- the carbon impurity concentration of the first buffer layer is less than or equal to 10 17 cm -3
- the carbon impurity concentration of the second buffer layer is greater than or equal to 10 16 cm -3 and less than or equal to 10 17 cm ⁇ 3
- the carbon impurity concentration of the third buffer layer is less than or equal to 5 ⁇ 10 16 cm ⁇ 3 .
- a semiconductor device comprising the epitaxial structure as described above.
- the buffer layer in the middle, and the buffer layer close to the substrate and the second semiconductor layer has almost no or only very little iron impurities, specifically, for example, the iron impurity concentration in the first buffer layer is substantially 0, and all
- the iron impurity concentration in the third buffer layer is less than 10 16 cm -3 , preferably substantially 0, which helps to improve the crystal quality of the buffer layer, and at the same time, also helps to improve the leakage induced barrier lowering (DIBL) effect of the device and the tailing effect of iron impurities, which can improve the sub-threshold characteristics of the device and ensure the reliability of the device.
- DIBL leakage induced barrier lowering
- the preparing the first semiconductor layer on the substrate comprises: epitaxially growing a nucleation layer on the substrate; epitaxially growing the nucleation layer on a side away from the substrate the first buffer layer; the second buffer layer is epitaxially grown on the side of the first buffer layer away from the nucleation layer, while iron impurities and carbon impurities are co-doped into the second buffer layer;
- the carbon impurity concentration of the second buffer layer satisfies a second preset range, and the carbon impurity concentration of the second buffer layer is smaller than the iron impurity concentration of the second buffer layer;
- the third buffer layer is epitaxially grown on one side of the first buffer layer.
- the step of preparing the buffer layer includes: when forming the first buffer layer, turning off the iron source, so that the iron impurity concentration in the first buffer layer is substantially 0; During the second buffer layer, the iron source is turned on and the flow rate is controlled so that the iron impurity concentration in the second buffer layer is 10 16 cm -3 to 5 ⁇ 10 18 cm -3 ; and when the second buffer layer is formed When the third buffer layer is used, the iron source is turned off, so that the iron impurity concentration in the third buffer layer is less than 10 16 cm ⁇ 3 .
- FIG. 2 is a schematic diagram of the concentration distribution of carbon impurities and iron impurities in the epitaxial structure of the application;
- the present application provides a novel epitaxial structure of a semiconductor device .
- the technical solutions of the present invention will be described in detail below through specific embodiments.
- the present application provides an epitaxial structure 100 of a semiconductor device, including a substrate 10 and a first semiconductor layer 20 , and the first semiconductor layer 20 is located on the substrate 10 .
- the substrate 110 may be one or a combination of gallium nitride, aluminum gallium nitride, indium gallium nitride, aluminum indium gallium nitride, indium phosphide, gallium arsenide, silicon carbide, diamond, sapphire, germanium, and silicon, or any other material capable of growing III-nitrides.
- the iron impurity in the third buffer layer is also substantially zero.
- the iron impurity content is substantially 0 means that iron is not actively doped, and theoretically, the iron impurity content is preferably 0, but in practice, iron inevitably exists.
- the first buffer layer 221 , the second buffer layer 222 and the third buffer layer 223 may be sequentially formed in stages by an epitaxial growth process.
- the growth conditions are controlled and the iron source is turned off, so that the iron impurity content in the first buffer layer 221 is 0; in the process of forming the second buffer layer 222, the growth conditions are adjusted and Turn on the iron source and control the flow rate so that iron impurities are doped into the second buffer layer 222; when the third buffer layer 223 is formed, continue to adjust the growth conditions and turn off the iron source, so that the concentration of iron impurities attenuated to the conductive channel can be reduced, so that the The iron impurity concentration of the third buffer layer 223 is maintained in a low range, eg, less than 10 16 cm ⁇ 3 .
- the distribution of iron impurities in the second buffer layer 222 can be achieved by the above method. It should be understood that the required first buffer layer 221, the second buffer layer 222 and the third buffer layer 223 can also be formed by other growth processes. The application does not limit the specific preparation process of the buffer layer 22 .
- the iron impurity concentration in the buffer layer is substantially 0, and the iron impurity concentration in the third buffer layer is less than 10 16 cm ⁇ 3 , preferably substantially 0, thereby helping to improve the crystal quality of the buffer layer 22 , and at the same time , and also helps to improve the leakage induced barrier lowering (DIBL) effect of the device and the tailing effect of iron impurities, thereby improving the sub-threshold characteristics of the device and ensuring the reliability of the device.
- DIBL leakage induced barrier lowering
- a third buffer layer 223 is also separated between 222 and the second semiconductor layer 30, and the iron impurity concentration in the third buffer layer 223 is also very small, which helps to reduce the iron content that decays into the channel and avoid iron impurities
- the impurity scattering into the channel reduces the two-dimensional electron gas concentration and electron mobility, and affects the saturation current and output power of the device.
- the second buffer layer 222 is further doped with carbon impurities, the carbon impurity concentration of the second buffer layer 222 satisfies the second preset range, and the carbon impurity concentration of the second buffer layer 222 is smaller than the second buffer layer 222 Iron impurity concentration of layer 222 .
- the iron impurity concentration is too low, the required high resistance of the buffer layer cannot be achieved; if the iron impurity concentration is too high and the carbon impurity concentration is too low, the crystal quality and surface morphology of the buffer layer 22 will be affected; if the carbon impurity concentration is too high If it is too high, the quality of the crystal growth of the buffer layer will deteriorate.
- the carbon impurity concentration of the first buffer layer 221 is less than or equal to 10 17 cm -3
- the carbon impurity concentration of the second buffer layer 222 is greater than or equal to 10 16 cm -3 and less than or equal to 10 17 cm -3
- the third The carbon impurity concentration of the buffer layer 223 is less than or equal to 5 ⁇ 10 16 cm ⁇ 3 .
- the thickness of the third buffer layer 223 is d 3 , where 200nm ⁇ d 3 ⁇ 500nm.
- the iron impurities in the second buffer layer 222 can have a proper distance from the conductive channel, thereby reducing the effect of the doped iron impurities on the two-dimensional electron gas in the conductive channel. influences.
- the third buffer layer 223 is too thin, the distance between the iron impurities in the second buffer layer 222 and the conductive channel is too small, which easily leads to excessive iron impurities attenuated to the conductive channel, thereby affecting the saturation current and output power of the device. , the reliability of the device is difficult to guarantee; and when the thickness of the third buffer layer 223 is too thick, the growth efficiency of the buffer layer 22 will be affected.
- the thickness of the second buffer layer 222 is d 2 , where 200nm ⁇ d 2 ⁇ 800nm.
- the thickness of the second buffer layer 222 is d 2 , where 200nm ⁇ d 2 ⁇ 800nm.
- the thickness of the first buffer layer is d 1 , wherein 200 nm ⁇ d 1 ⁇ 800 nm.
- the buffer layer 22 may further include a fourth buffer layer 224 and a fifth buffer layer 225 .
- the fourth buffer layer 224 is located between the first buffer layer 221 and the second buffer layer 222
- the fifth buffer layer 225 is located between the second buffer layer 222 and the third buffer layer 223 .
- the first semiconductor layer 20 may further include a nucleation layer 21 , the nucleation layer 21 is located on the substrate 10 , and the buffer layer 22 is located at a part of the nucleation layer 21 away from the substrate 10 . side.
- the nucleation layer 21 can affect parameters such as crystal quality, surface morphology and electrical properties of the above heterojunction material.
- the nucleation layer 21 varies with different materials of the substrate 10 , and mainly plays the role of matching the substrate 10 and the semiconductor material layer in the heterojunction structure.
- the nucleation layer 21 may be formed of high-temperature AlN or low-temperature GaN, and is mainly used to convert the three-dimensional growth mode of the buffer layer 22 in the initial stage to a two-dimensional growth mode.
- the present application also provides a semiconductor device including the epitaxial structure 100 as described above.
- the above-mentioned semiconductor device can be fabricated by the epitaxial structure 100 described above, thereby helping to obtain better device leakage and pinch-off characteristics, improving the sub-threshold characteristics of the device, and ensuring the reliability of the device.
- the source electrode, the gate electrode and the drain electrode can be continuously fabricated on the above-mentioned epitaxial structure 100, so as to obtain a field effect transistor with better performance.
- the substrate 10 is provided.
- a first semiconductor layer 20 is prepared on the substrate 10; the first semiconductor layer 20 includes a buffer layer 22, and the buffer layer 22 at least includes a first buffer layer 221, a second buffer layer 222 and a third buffer layer 223 that are stacked and arranged,
- the second buffer layer 222 is located between the first buffer layer 221 and the third buffer layer 223 , the buffer layer 22 is doped with iron impurities, and the iron impurities are doped in the second buffer layer 222 .
- the carbon impurity concentration in the first buffer layer 221 can be kept in a lower range through the epitaxial growth process, thereby helping to improve the growth quality of subsequent crystals of the buffer layer.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Recrystallisation Techniques (AREA)
- Junction Field-Effect Transistors (AREA)
Abstract
Description
Claims (14)
- 一种半导体器件的外延结构,其特征在于,包括:衬底;第一半导体层,位于所述衬底上,所述第一半导体层包括缓冲层,所述缓冲层至少包括层叠设置的第一缓冲层、第二缓冲层和第三缓冲层,所述第二缓冲层位于所述第一缓冲层和所述第三缓冲层之间;其中,所述第二缓冲层中掺杂有铁杂质,且所述第一缓冲层和所述第三缓冲层中不主动地掺杂铁杂质。
- 根据权利要求1所述的外延结构,其特征在于,所述第二缓冲层中还掺杂有碳杂质,且所述第二缓冲层的碳杂质浓度小于所述第二缓冲层的铁杂质浓度。
- 根据权利要求2所述的外延结构,其特征在于,所述第二缓冲层的铁杂质浓度满足第一预设范围,所述第一预设范围包括10 16cm -3~5×10 18cm -3;所述第二缓冲层的碳杂质浓度满足第二预设范围,所述第二预设范围包括10 16cm -3~10 17cm -3。
- 根据权利要求1所述的外延结构,其特征在于,所述第二缓冲层的厚度为d 2,其中,200nm≤d 2≤800nm。
- 根据权利要求2所述的外延结构,其特征在于,所述第一缓冲层位于所述第二缓冲层靠近所述衬底一侧,所述第三缓冲层位于所述第二缓冲层靠近所述第二半导体层一侧;其中,所述第一缓冲层具有碳杂质,所述第一缓冲层的碳杂质浓度小于或等于所述第二缓冲层的碳杂质浓度;且,所述第三缓冲层具有碳杂质,所述第三缓冲层的碳杂质浓度小于所述第二缓冲层的碳杂质浓度。
- 根据权利要求5所述的外延结构,其特征在于,所述第一缓冲层的碳杂质浓度小于或等于10 17cm -3,所述第二缓冲层的碳杂质浓度大于或等于10 16cm -3且小于或等于10 17cm -3,所述第三缓冲层的碳杂质浓度小于或等于5×10 16cm -3。
- 根据权利要求5所述的外延结构,其特征在于,所述第三缓冲层的厚度为d 3,其中,200nm≤d 3≤500nm;所述第一缓冲层的厚度为d 1,其中,200nm≤d 1≤800nm。
- 根据权利要求1所述的外延结构,其特征在于,所述第一 缓冲层中的铁杂质浓度基本上为0,且所述第三缓冲层中的铁杂质浓度小于10 16cm -3。
- 根据权利要求8所述的外延结构,其特征在于,所述第三缓冲层中的铁杂质浓度基本上为0。
- 一种半导体器件,其特征在于,包括如权利要求1-9任一项所述的外延结构。
- 一种半导体器件的外延结构的制备方法,其特征在于,包括:提供衬底;在所述衬底上制备第一半导体层;所述第一半导体层包括缓冲层,所述缓冲层至少包括层叠设置的第一缓冲层、第二缓冲层和第三缓冲层,所述第二缓冲层位于所述第一缓冲层和所述第三缓冲层之间,所述第二缓冲层掺杂有铁杂质,且所述第一缓冲层和所述第三缓冲层中不主动地掺杂铁杂质,所述第二缓冲层的铁杂质浓度满足第一预设范围;以及,在所述第一半导体层远离所述衬底的一侧制备第二半导体层,所述第二半导体层中形成有导电沟道。
- 根据权利要求11所述的制备方法,其特征在于,所述在所述衬底上制备第一半导体层包括:在所述衬底上外延生长成核层;在所述成核层远离所述衬底的一侧外延生长所述第一缓冲层;在所述第一缓冲层远离所述成核层的一侧外延生长所述第二缓冲层,同时将铁杂质和碳杂质共同掺入所述第二缓冲层;且所述第二缓冲层的碳杂质浓度小于所述第二缓冲层的铁杂质浓度;以及,在所述第二缓冲层远离所述第一缓冲层的一侧外延生长所述第三缓冲层。
- 根据权利要求11所述的制备方法,其特征在于,制备所述缓冲层的步骤包括:在形成所述第一缓冲层时,关闭铁源,以使所述第一缓冲层中的铁杂质浓度基本上为0;在形成所述第二缓冲层时,打开所述铁源并控制流量,以使所述第二缓冲层中的铁杂质浓度为10 16cm -3~5×10 18cm -3;以及在形成所述第三缓冲层时,关闭所述铁源,以使所述第三缓冲层中的铁杂质浓度小于10 16cm -3。
- 根据权利要求13所述的制备方法,其特征在于,所述第三缓冲层中的铁杂质浓度基本上为0。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US18/268,537 US20240021671A1 (en) | 2020-12-24 | 2021-12-21 | Epitaxial structure of semiconductor device, device and method of manufacturing epitaxial structure |
JP2022560393A JP2023519637A (ja) | 2020-12-24 | 2021-12-21 | 半導体装置のエピタキシャル構造、装置及びエピタキシャル構造の製造方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011573138.2A CN114678411A (zh) | 2020-12-24 | 2020-12-24 | 半导体器件的外延结构、器件及外延结构的制备方法 |
CN202011573138.2 | 2020-12-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022135403A1 true WO2022135403A1 (zh) | 2022-06-30 |
Family
ID=82070176
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2021/140112 WO2022135403A1 (zh) | 2020-12-24 | 2021-12-21 | 半导体器件的外延结构、器件及外延结构的制备方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20240021671A1 (zh) |
JP (1) | JP2023519637A (zh) |
CN (1) | CN114678411A (zh) |
WO (1) | WO2022135403A1 (zh) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120322245A1 (en) * | 2011-06-15 | 2012-12-20 | Mitsubishi Electric Corporation | Method of manufacturing nitride semiconductor device |
CN106601790A (zh) * | 2016-12-29 | 2017-04-26 | 中国科学院半导体研究所 | 纵向调制掺杂氮化镓基场效应晶体管结构及其制作方法 |
CN106972058A (zh) * | 2016-12-15 | 2017-07-21 | 苏州能讯高能半导体有限公司 | 一种半导体器件及其制备方法 |
CN110838514A (zh) * | 2018-08-17 | 2020-02-25 | 苏州能讯高能半导体有限公司 | 一种半导体器件的外延结构及其制备方法、半导体器件 |
CN111009579A (zh) * | 2018-10-08 | 2020-04-14 | 合肥彩虹蓝光科技有限公司 | 半导体异质结构及半导体器件 |
-
2020
- 2020-12-24 CN CN202011573138.2A patent/CN114678411A/zh active Pending
-
2021
- 2021-12-21 JP JP2022560393A patent/JP2023519637A/ja active Pending
- 2021-12-21 US US18/268,537 patent/US20240021671A1/en active Pending
- 2021-12-21 WO PCT/CN2021/140112 patent/WO2022135403A1/zh active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120322245A1 (en) * | 2011-06-15 | 2012-12-20 | Mitsubishi Electric Corporation | Method of manufacturing nitride semiconductor device |
CN106972058A (zh) * | 2016-12-15 | 2017-07-21 | 苏州能讯高能半导体有限公司 | 一种半导体器件及其制备方法 |
CN106601790A (zh) * | 2016-12-29 | 2017-04-26 | 中国科学院半导体研究所 | 纵向调制掺杂氮化镓基场效应晶体管结构及其制作方法 |
CN110838514A (zh) * | 2018-08-17 | 2020-02-25 | 苏州能讯高能半导体有限公司 | 一种半导体器件的外延结构及其制备方法、半导体器件 |
CN111009579A (zh) * | 2018-10-08 | 2020-04-14 | 合肥彩虹蓝光科技有限公司 | 半导体异质结构及半导体器件 |
Also Published As
Publication number | Publication date |
---|---|
CN114678411A (zh) | 2022-06-28 |
US20240021671A1 (en) | 2024-01-18 |
JP2023519637A (ja) | 2023-05-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3836697B2 (ja) | 半導体素子 | |
US8350292B2 (en) | Gallium nitride epitaxial crystal, method for production thereof, and field effect transistor | |
US9419125B1 (en) | Doped barrier layers in epitaxial group III nitrides | |
JP3792390B2 (ja) | 半導体装置及びその製造方法 | |
CN109638074B (zh) | 具有n-p-n结构背势垒的高电子迁移率晶体管及其制作方法 | |
JP2005005657A (ja) | 電界効果トランジスタの結晶層構造 | |
JP2002359255A (ja) | 半導体素子 | |
JP4468744B2 (ja) | 窒化物半導体薄膜の作製方法 | |
CN113555431B (zh) | 基于P型GaN漏电隔离层的同质外延氮化镓高电子迁移率晶体管及制作方法 | |
CN112133749A (zh) | 一种p型帽层增强型hemt器件及其制备方法 | |
JP2009111204A (ja) | 電界効果トランジスタ及びその製造方法 | |
CN115360236A (zh) | 一种具有高阻缓冲层的GaN HEMT器件及其制备方法 | |
CN113314597B (zh) | 一种氮极性面氮化镓高电子迁移率晶体管及其制作方法 | |
CN112951910A (zh) | BAlN/GaN高电子迁移率晶体管及其制作方法 | |
CN110676167A (zh) | 多沟道鳍式结构的AlInN/GaN高电子迁移率晶体管及制作方法 | |
TWI574407B (zh) | 半導體功率元件 | |
CN110429128B (zh) | 一种低势垒多量子阱高阻缓冲层外延结构及其制备方法 | |
WO2022135403A1 (zh) | 半导体器件的外延结构、器件及外延结构的制备方法 | |
JP2006032524A (ja) | 窒化物半導体ヘテロ構造電界効果トランジスタ構造とその作製法 | |
TWI760937B (zh) | 半導體結構及其製作方法 | |
CN113314598A (zh) | 一种金刚石基氮极性面氮化镓高电子迁移率晶体管及其制作方法 | |
KR20130105804A (ko) | 반도체 기판 및 절연 게이트형 전계 효과 트랜지스터 | |
CN113314590B (zh) | 一种氮化物高电子迁移率晶体管及其制作方法 | |
WO2022061590A1 (zh) | 半导体结构的制作方法 | |
CN113594231A (zh) | 基于极化掺杂AlGaN漏电隔离层的同质外延GaN HEMT及其制作方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21909399 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2022560393 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18268537 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 21909399 Country of ref document: EP Kind code of ref document: A1 |