JP2005236287A - 窒化物基半導体デバイスのための低ドープ層 - Google Patents
窒化物基半導体デバイスのための低ドープ層 Download PDFInfo
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- JP2005236287A JP2005236287A JP2005039131A JP2005039131A JP2005236287A JP 2005236287 A JP2005236287 A JP 2005236287A JP 2005039131 A JP2005039131 A JP 2005039131A JP 2005039131 A JP2005039131 A JP 2005039131A JP 2005236287 A JP2005236287 A JP 2005236287A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 108
- 150000004767 nitrides Chemical class 0.000 title claims abstract description 75
- 230000015556 catabolic process Effects 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims description 53
- 239000002184 metal Substances 0.000 claims description 53
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 31
- 229910002601 GaN Inorganic materials 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 24
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 19
- 239000010931 gold Substances 0.000 claims description 16
- 239000010936 titanium Substances 0.000 claims description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 12
- 229910052697 platinum Inorganic materials 0.000 claims description 10
- 239000002019 doping agent Substances 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 7
- 229910052737 gold Inorganic materials 0.000 claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910052763 palladium Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 15
- 238000003877 atomic layer epitaxy Methods 0.000 description 6
- 238000001451 molecular beam epitaxy Methods 0.000 description 6
- 238000005546 reactive sputtering Methods 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 5
- 238000005229 chemical vapour deposition Methods 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 229910052733 gallium Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 239000010980 sapphire Substances 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- -1 ideally Substances 0.000 description 1
- 238000010348 incorporation Methods 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
- 239000012212 insulator Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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- 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
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/45—Ohmic electrodes
- H01L29/452—Ohmic electrodes on AIII-BV compounds
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- 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
- H01L29/15—Structures with periodic or quasi periodic potential variation, e.g. multiple quantum wells, superlattices
- H01L29/157—Doping structures, e.g. doping superlattices, nipi superlattices
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- 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
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/47—Schottky barrier electrodes
- H01L29/475—Schottky barrier electrodes on AIII-BV compounds
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- H—ELECTRICITY
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- 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
- H01L29/7787—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 with wide bandgap charge-carrier supplying layer, e.g. direct single heterostructure MODFET
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- 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
- H01L29/86—Types of semiconductor device ; Multistep manufacturing processes therefor controllable only by variation of the electric current supplied, or only the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated or switched
- H01L29/861—Diodes
- H01L29/872—Schottky diodes
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- 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
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- Electrodes Of Semiconductors (AREA)
Abstract
【解決手段】複数のドープされた窒化物半導体材料の副層208と、複数のドープされていない窒化物半導体材料の副層209とを、別の層の上に交互に配置されるように形成させることによって、再現可能で、且つ均一な低ドープ層を形成させる。この低ドープ窒化物半導体層を遙かに高くドープされた窒化物半導体層106の上に形成させることによって、ショットキーダイオードが形成される。得られたデバイスは、デバイスの順方向バイアス時のオン抵抗が低く、デバイスの逆方向バイアス時の降伏電圧が高い。
【選択図】図2
Description
102 基体
106 高ドープ半導体層
108 低ドープ半導体層
110 ショットキー接触金属層
112 ボンドパッド金属層
116 オーミック接触金属層
208 ドープされた窒化物基材料の副層
209 ドープされていない窒化物基材料の副層
Claims (10)
- 半導体層構造を形成させる方法であって、
少なくとも1つのドープされた窒化物半導体の副層と、少なくとも1つのドープされていない窒化物半導体の副層とを、別の層の少なくとも一部分の上に形成させることによって上記別の層の少なくとも一部分の上に変調ドープされた層を形成させるステップを含み、上記変調ドープされた層が多くとも2E16cm-3のドーピング濃度を有することを特徴とする方法。 - 上記形成ステップは、複数のドープされた窒化物半導体の副層と、複数のドープされていない窒化物半導体の副層との交互配列を、上記別の層の少なくとも一部分の上に形成させるステップを含むことを特徴とする請求項1に記載の方法。
- 上記形成ステップは、上記ドープされた窒化物半導体の副層から上記ドープされていない窒化物半導体の副層内へドーパントを拡散させて上記変調ドープされた層を形成させるステップを含み、上記変調ドープされた層が実質的に均一のドーピング濃度を有することを特徴とする請求項1に記載の方法。
- 上記変調ドープされた層は、窒化ガリウム基半導体を含むことを特徴とする請求項1に記載の方法。
- 上記変調ドープされた層は、GaNを含むことを特徴とする請求項1に記載の方法。
- 上記変調ドープされた層は、少なくとも0.2μmの、そして多くとも10μmの厚みを有することを特徴とする請求項1に記載の方法。
- 上記変調ドープされた層の上に接触金属層を形成させることによってショットキー接合を形成させるステップを更に含むことを特徴とする請求項1に記載の方法。
- 上記別の層の別の部分の上にオーミック接触金属層を形成させるステップを更に含み、上記ショットキーダイオードのオン抵抗と、上記ショットキーダイオードの降伏電圧との比が多くとも2×10-5Ω・cm2/Vであることを特徴とする請求項7に記載の方法。
- 上記ショットキー接触金属層は、白金(Pt)、パラジウム(Pd)、及びニッケル(Ni)からなるグループから選択されることを特徴とする請求項7に記載の方法。
- 上記オーミック接触金属層は、アルミニウム/チタン/白金/金(Al/Ti/Pt/Au)、及びチタン/アルミニウム/白金/金(Ti/Al/Pt/Au)からなるグループから選択されることを特徴とする請求項8に記載の方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US10/780526 | 2004-02-17 | ||
US10/780,526 US7253015B2 (en) | 2004-02-17 | 2004-02-17 | Low doped layer for nitride-based semiconductor device |
Publications (2)
Publication Number | Publication Date |
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JP2005236287A true JP2005236287A (ja) | 2005-09-02 |
JP5150802B2 JP5150802B2 (ja) | 2013-02-27 |
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JP2005039131A Expired - Fee Related JP5150802B2 (ja) | 2004-02-17 | 2005-02-16 | 窒化物基半導体デバイスのための低ドープ層 |
Country Status (6)
Country | Link |
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US (1) | US7253015B2 (ja) |
EP (1) | EP1564801A1 (ja) |
JP (1) | JP5150802B2 (ja) |
CN (1) | CN100517568C (ja) |
DE (1) | DE102005006766A1 (ja) |
TW (1) | TWI358838B (ja) |
Cited By (1)
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JP5644105B2 (ja) * | 2007-03-26 | 2014-12-24 | 住友電気工業株式会社 | ショットキーバリアダイオードの製造方法 |
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DE102005006766A1 (de) | 2005-11-03 |
US7253015B2 (en) | 2007-08-07 |
CN1658371A (zh) | 2005-08-24 |
TWI358838B (en) | 2012-02-21 |
TW200541106A (en) | 2005-12-16 |
JP5150802B2 (ja) | 2013-02-27 |
US20050179107A1 (en) | 2005-08-18 |
CN100517568C (zh) | 2009-07-22 |
EP1564801A1 (en) | 2005-08-17 |
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