JP2006286951A - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 144
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 44
- 238000001312 dry etching Methods 0.000 claims abstract description 27
- 238000005530 etching Methods 0.000 claims abstract description 21
- 239000002253 acid Substances 0.000 claims abstract description 20
- 239000007800 oxidant agent Substances 0.000 claims abstract description 20
- 238000004380 ashing Methods 0.000 claims abstract description 14
- 239000011259 mixed solution Substances 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 229910002704 AlGaN Inorganic materials 0.000 claims description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 4
- 238000004381 surface treatment Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 19
- 230000015556 catabolic process Effects 0.000 abstract description 17
- 239000007788 liquid Substances 0.000 abstract description 3
- 230000001590 oxidative effect Effects 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 122
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 74
- 229910002601 GaN Inorganic materials 0.000 description 73
- 239000007789 gas Substances 0.000 description 33
- 239000011229 interlayer Substances 0.000 description 9
- 239000011241 protective layer Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 238000000059 patterning Methods 0.000 description 8
- 239000007864 aqueous solution Substances 0.000 description 7
- 238000001771 vacuum deposition Methods 0.000 description 7
- 238000001039 wet etching Methods 0.000 description 6
- 229910003902 SiCl 4 Inorganic materials 0.000 description 4
- 239000003550 marker Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 230000007261 regionalization Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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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 potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/30604—Chemical etching
- H01L21/30612—Etching of AIIIBV compounds
- H01L21/30617—Anisotropic liquid etching
-
- 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 potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/30604—Chemical etching
- H01L21/30612—Etching of AIIIBV compounds
- H01L21/30621—Vapour phase etching
-
- 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
- H01L29/02—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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- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Chemical & Material Sciences (AREA)
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- Ceramic Engineering (AREA)
- Junction Field-Effect Transistors (AREA)
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Abstract
【解決手段】 半導体装置の製造方法は、GaN系半導体層(1)の一面にO2アッシング、有機処理またはドライエッチングのいずれかを実行する第1の工程と、GaN系半導体層(1)の一面を酸化剤および酸の混合液によりエッチングする第2の工程と、GaN系半導体層(1)の一面に電極(7,8,11)を形成する第3の工程とを含むことを特徴とする。この場合、酸化剤および酸の混合液により変質層が効率よく除去される。それにより、電流リークパスの形成が防止され、安定したオーミックコンタクトを得ることができる。その結果、耐圧低下を防止することができる。
【選択図】 図1
Description
2 絶縁層
7,27 ソース電極
8,28 ドレイン電極
11,31 ゲート電極
12 層間膜
21a GaN層
21b 供給層
21c キャップ層
100 半導体装置
Claims (10)
- GaN系半導体層の一面にO2アッシング、有機処理またはドライエッチングのいずれかを実行する第1の工程と、
前記GaN系半導体基板の一面を酸化剤および酸の混合液によりエッチングする第2の工程と、
前記GaN系半導体層の一面に電極を形成する第3の工程とを含むことを特徴とする半導体装置の製造方法。 - GaN系半導体層の一面にO2アッシング、有機処理またはドライエッチングのいずれかを実行する第1の工程と、
前記GaN系半導体基板の一面をCl含有ガスによりドライエッチングする第2の工程と、
前記GaN系半導体層の一面に電極を形成する第3の工程とを含むことを特徴とする半導体装置の製造方法。 - GaN系半導体層の一面に絶縁膜を形成する第1の工程と、
前記絶縁膜上に開口部を有するマスクを形成する第2の工程と、
前記マスクを介して前記絶縁膜を除去し、前記GaN系半導体層を暴露する第3の工程と、
前記GaN系半導体層の暴露された部分を酸化剤および酸の混合液によりエッチングする第4の工程と、
前記GaN系半導体層の暴露された部分に電極を形成する第5の工程とを含むことを特徴とする半導体装置の製造方法。 - GaN系半導体層の一面に絶縁膜を形成する第1の工程と、
前記絶縁膜上に開口部を有するマスクを形成する第2の工程と、
前記マスクを介して前記絶縁膜を除去し、前記GaN系半導体層を暴露する第3の工程と、
前記GaN系半導体層をCl含有ガスによりドライエッチングする第4の工程と、
前記GaN系半導体層の暴露された部分に電極を形成する第5の工程とを含むことを特徴とする半導体装置の製造方法。 - GaN系半導体層の一面を酸化剤および酸の混合液によりエッチングする第1の工程と、
前記GaN系半導体の一面に絶縁膜を形成する第2の工程とを含むことを特徴とする半導体装置の製造方法。 - GaN系半導体層の一面をCl含有ガスによりドライエッチングする第1の工程と、
前記GaN系半導体層の一面に絶縁膜を形成する第2の工程とを含むことを特徴とする半導体装置の製造方法。 - 前記酸化剤および酸の混合液によるエッチング処理の後に、さらにフッ酸による表面処理を施すことを特徴とする請求項1、3、5のいずれかに記載の半導体装置の製造方法。
- 前記酸化剤および酸の混合液は、HF+HNO3、H2SO4+H2O2+H2O、H3PO4+H2O2+H2O、H3PO4+H2O2およびHF+H2O+H2O2のいずれかの混合液であることを特徴とする請求項1、3、5のいずれかに記載の半導体装置の製造方法。
- 前記Cl含有ガスによるエッチング処理は、RIE、ICPまたはECRのいずれかによりなされることを特徴とする請求項2、4、6のいずれかに記載の半導体装置の製造方法。
- 前記GaN系半導体層は、GaNまたはAlGaNであることを特徴とする請求項1〜6のいずれかに記載の半導体装置の製造方法。
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JP2005105160A JP4536568B2 (ja) | 2005-03-31 | 2005-03-31 | Fetの製造方法 |
US11/390,105 US7585779B2 (en) | 2005-03-31 | 2006-03-28 | Fabrication method of semiconductor device |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009026811A (ja) * | 2007-07-17 | 2009-02-05 | Toyota Motor Corp | Iii族窒化物半導体装置の製造方法 |
JP2009038070A (ja) * | 2007-07-31 | 2009-02-19 | Toyota Motor Corp | 窒化物半導体装置とその製造方法 |
JP2011166149A (ja) * | 2010-02-10 | 2011-08-25 | Lg Innotek Co Ltd | 発光素子 |
JP2013077609A (ja) * | 2011-09-29 | 2013-04-25 | Fujitsu Ltd | 化合物半導体装置の製造方法 |
JP2014089993A (ja) * | 2012-10-29 | 2014-05-15 | Sumitomo Electric Device Innovations Inc | 半導体装置およびその製造方法 |
JP2015181190A (ja) * | 2015-05-25 | 2015-10-15 | 住友電工デバイス・イノベーション株式会社 | 半導体装置の製造方法 |
JP2017079287A (ja) * | 2015-10-21 | 2017-04-27 | 住友電気工業株式会社 | 半導体装置及び半導体装置の製造方法 |
Families Citing this family (3)
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US7935620B2 (en) | 2007-12-05 | 2011-05-03 | Freescale Semiconductor, Inc. | Method for forming semiconductor devices with low leakage Schottky contacts |
JP2012033689A (ja) * | 2010-07-30 | 2012-02-16 | Sumitomo Electric Device Innovations Inc | 半導体装置の製造方法 |
CN104752306B (zh) * | 2013-12-31 | 2018-03-09 | 北京北方华创微电子装备有限公司 | 在氮化镓层上刻蚀隔离槽的处理方法 |
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