JP5011069B2 - 小さな寄生抵抗を有する低電圧ダイオードおよび製造方法 - Google Patents
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- 230000003071 parasitic effect Effects 0.000 title description 9
- 239000000758 substrate Substances 0.000 claims description 51
- 230000004888 barrier function Effects 0.000 claims description 45
- 229910052751 metal Inorganic materials 0.000 claims description 45
- 239000002184 metal Substances 0.000 claims description 45
- 238000000034 method Methods 0.000 claims description 44
- 239000004065 semiconductor Substances 0.000 claims description 23
- 238000000151 deposition Methods 0.000 claims description 19
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- 230000006911 nucleation Effects 0.000 claims description 12
- 238000010899 nucleation Methods 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 7
- 150000004767 nitrides Chemical class 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 229910015363 Au—Sn Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims description 3
- 230000005496 eutectics Effects 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910001120 nichrome Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- 229910052732 germanium Inorganic materials 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 140
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 30
- 229910002601 GaN Inorganic materials 0.000 description 20
- 239000000463 material Substances 0.000 description 15
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 15
- 229910010271 silicon carbide Inorganic materials 0.000 description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 229910002704 AlGaN Inorganic materials 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 238000001020 plasma etching Methods 0.000 description 4
- 230000006798 recombination Effects 0.000 description 4
- 238000005215 recombination Methods 0.000 description 4
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 239000002800 charge carrier Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 238000009616 inductively coupled plasma Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 239000010980 sapphire Substances 0.000 description 2
- 229910017980 Ag—Sn Inorganic materials 0.000 description 1
- -1 AlGaN Chemical group 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052737 gold Inorganic materials 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
- 238000001465 metallisation Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000000206 photolithography Methods 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
- H01L29/66—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
- H01L29/66083—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by variation of the electric current supplied or the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated or switched, e.g. two-terminal devices
- H01L29/6609—Diodes
- H01L29/66143—Schottky diodes
-
- 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
- H01L29/47—Schottky barrier electrodes
- H01L29/475—Schottky barrier 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
- H01L29/66—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
- H01L29/66083—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by variation of the electric current supplied or the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated or switched, e.g. two-terminal devices
- H01L29/66196—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by variation of the electric current supplied or the electric potential applied, to one or more of the electrodes carrying the current to be rectified, amplified, oscillated or switched, e.g. two-terminal devices with an active layer made of a group 13/15 material
- H01L29/66204—Diodes
- H01L29/66212—Schottky diodes
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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
- H01L29/66—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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- 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
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- Electrodes Of Semiconductors (AREA)
Description
Claims (13)
- ダイオードを製造する方法であって、
基板を提供するステップと、
前記基板上に複数の半導体層を付着させるステップと、
前記半導体層上に誘電体層を付着させるステップと、
前記誘電体層の一部分を除去するステップと、
前記誘電体層の除去された部分によって残された空洞の中の前記複数の半導体層上に、ショットキー金属を付着させるステップと、
導電性支持層を提供するステップと、
金属接合層によって前記誘電体層を前記支持層に貼り付けるステップと、
前記基板を除去して、前記半導体層のうちの前記基板に隣接した1つの半導体層を露出させるステップと、
露出された前記半導体層上にオーミックコンタクトを付着させるステップとを備えることを特徴とする方法。 - 複数の半導体層を付着させる前記ステップは、前記基板上にn+半導電性緩衝層を付着させるステップと、前記n+層上にn−半導電層を付着させるステップと、前記n−層上に半導電性障壁層を付着させるステップとを含むことを特徴とする請求項1に記載の方法。
- 前記n+、n−および障壁層の部分を選択的に除去して、前記誘電体層上に前記ショットキー金属を覆うメサ形ダイオード構造を形成するステップをさらに備えることを特徴とする請求項2に記載の方法。
- 前記基板上にn+層を付着させる前記ステップの前に、前記基板上に核生成層を付着させるステップをさらに備えることを特徴とする請求項2に記載の方法。
- 前記n+層は、5×1017/cm3から5×1019/cm3の不純物濃度を有するようにドープされた厚さ0.5から5μmのGaN層を含むことを特徴とする請求項2から4のいずれか1項に記載の方法。
- 前記n−層は、1×1015/cm3から1×1017/cm3の不純物濃度を有するようにドープされた厚さ0.5から5μmのGaN層を含むことを特徴とする請求項2から5のいずれか1項に記載の方法。
- 前記障壁層は、厚さ5〜15ÅのAlxGa1−xN層を含み、0.15≦x≦0.45であることを特徴とする請求項2から6のいずれか1項に記載の方法。
- 金属接合層によって前記誘電体層を前記支持層に貼り付ける前記ステップは、Au−Sn共晶ウェハ接合プロセスを使用して前記誘電体層を前記支持層に貼り付けるステップを含むことを特徴とする請求項1から7のいずれか1項に記載の方法。
- 導電性支持層と、
前記導電性支持層上に配置された誘電層と、
前記導電性支持層上に配置され、かつ前記誘電層の一部分を除去した後に残った空洞の中に設けられたショットキー金属層と、
前記導電性支持層とは反対側の前記ショットキー金属層上に配置された半導電性障壁層と、
前記ショットキー金属層とは反対側の前記障壁層上に配置されたn−半導電性層と、
前記障壁層とは反対側の前記n−層上に配置されたn+半導体緩衝層であって、当該n+層が予め基板の上に形成された層である、n+半導体緩衝層と、
前記基板が除去された後に、前記n−層とは反対側の前記n+層の表面に配置されたオーミックコンタクトと、
を備えたことを特徴とするダイオード。 - 前記支持層に前記ショットキー金属層を貼り付ける金属接合層をさらに備えることを特徴とする請求項9に記載のダイオード。
- 前記n+層、前記n−層および前記障壁層はIII族窒化物を含むことを特徴とする請求項9に記載のダイオード。
- 前記ショットキー金属は、Cr、Fe、Mn、Nb、Ni、NiCr、Sn、Ta、Ti、GeおよびW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9から11のいずれか1項に記載のダイオード。
- 前記導電性支持層は金属被覆されたSiであることを特徴とする請求項9から12のいずれか1項に記載のダイオード。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US11/655,696 US7834367B2 (en) | 2007-01-19 | 2007-01-19 | Low voltage diode with reduced parasitic resistance and method for fabricating |
US11/655,696 | 2007-01-19 |
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JP2008177537A JP2008177537A (ja) | 2008-07-31 |
JP5011069B2 true JP5011069B2 (ja) | 2012-08-29 |
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EP (1) | EP1947700B1 (ja) |
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