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
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 Download PDFInfo
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- JP5011069B2 JP5011069B2 JP2007292302A JP2007292302A JP5011069B2 JP 5011069 B2 JP5011069 B2 JP 5011069B2 JP 2007292302 A JP2007292302 A JP 2007292302A JP 2007292302 A JP2007292302 A JP 2007292302A JP 5011069 B2 JP5011069 B2 JP 5011069B2
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/67—Thin-film transistors [TFT]
- H10D30/6729—Thin-film transistors [TFT] characterised by the electrodes
- H10D30/6737—Thin-film transistors [TFT] characterised by the electrodes characterised by the electrode materials
- H10D30/6738—Schottky barrier electrodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/67—Thin-film transistors [TFT]
- H10D30/674—Thin-film transistors [TFT] characterised by the active materials
- H10D30/675—Group III-V materials, Group II-VI materials, Group IV-VI materials, selenium or tellurium
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/80—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials
- H10D62/85—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials being Group III-V materials, e.g. GaAs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/60—Electrodes characterised by their materials
- H10D64/64—Electrodes comprising a Schottky barrier to a semiconductor
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D8/00—Diodes
- H10D8/01—Manufacture or treatment
- H10D8/051—Manufacture or treatment of Schottky diodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D8/00—Diodes
- H10D8/60—Schottky-barrier diodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/80—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials
- H10D62/85—Semiconductor bodies, or regions thereof, of devices having potential barriers characterised by the materials being Group III-V materials, e.g. GaAs
- H10D62/8503—Nitride Group III-V materials, e.g. AlN or GaN
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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 |
|---|---|---|---|
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2008177537A JP2008177537A (ja) | 2008-07-31 |
| JP5011069B2 true JP5011069B2 (ja) | 2012-08-29 |
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| JP2007292302A Active JP5011069B2 (ja) | 2007-01-19 | 2007-11-09 | 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 |
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|---|---|
| US (3) | US7834367B2 (ja) |
| EP (1) | EP1947700B1 (ja) |
| JP (1) | JP5011069B2 (ja) |
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| US20110031579A1 (en) | 2011-02-10 |
| EP1947700B1 (en) | 2016-01-06 |
| EP1947700A2 (en) | 2008-07-23 |
| US20130126894A1 (en) | 2013-05-23 |
| US9041139B2 (en) | 2015-05-26 |
| EP1947700A3 (en) | 2010-01-13 |
| US20080173882A1 (en) | 2008-07-24 |
| JP2008177537A (ja) | 2008-07-31 |
| US7834367B2 (en) | 2010-11-16 |
| US8344398B2 (en) | 2013-01-01 |
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