JP2022145319A - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 168
- 238000002955 isolation Methods 0.000 claims description 71
- 238000000926 separation method Methods 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 115
- 238000000034 method Methods 0.000 description 29
- 230000004888 barrier function Effects 0.000 description 22
- 238000000059 patterning Methods 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 229910002601 GaN Inorganic materials 0.000 description 8
- 229910052581 Si3N4 Inorganic materials 0.000 description 8
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 8
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 7
- 238000005468 ion implantation Methods 0.000 description 7
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 5
- 150000004767 nitrides Chemical class 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005684 electric field Effects 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 229910052814 silicon oxide Inorganic materials 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- RNQKDQAVIXDKAG-UHFFFAOYSA-N aluminum gallium Chemical compound [Al].[Ga] RNQKDQAVIXDKAG-UHFFFAOYSA-N 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 238000004645 scanning capacitance microscopy Methods 0.000 description 3
- 238000001004 secondary ion mass spectrometry Methods 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000002149 energy-dispersive X-ray emission spectroscopy Methods 0.000 description 2
- CJNBYAVZURUTKZ-UHFFFAOYSA-N hafnium(iv) oxide Chemical compound O=[Hf]=O CJNBYAVZURUTKZ-UHFFFAOYSA-N 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- NWAIGJYBQQYSPW-UHFFFAOYSA-N azanylidyneindigane Chemical compound [In]#N NWAIGJYBQQYSPW-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- -1 for example Chemical compound 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 230000005533 two-dimensional electron gas Effects 0.000 description 1
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Abstract
Description
第1実施形態の半導体装置は、半導体層を有する半導体素子と、半導体素子上に配線層とを備える。以下、GaN系の半導体装置を例に説明するが、半導体素子はGaN系以外の横型のトランジスタでもよい。
を備える。
第2実施形態の半導体装置は、第1実施形態の半導体装置100の変形例である。図30に第2実施形態の半導体装置200の模式図を示す。図31は、図30のM-M’断面の位置に相当する半導体装置200の部分断面図である。図32は、図31のN-N’断面の位置に相当する半導体装置200の部分断面図である。図30に図示していないゲートフィールドプレート電極6、ソースフィールドプレート電極7及びドレインフィールドプレート電極8がそれぞれゲート電極パッド3A、ソース電極パッド4A及びドレイン電極パッド5Aと接続している。
200 半導体装置
1 半導体層
2 ゲート絶縁膜(第1絶縁膜)
3 ゲート電極(第1電極)
4 ソース電極(第2電極)
5 ドレイン電極(第3電極)
6 第1フィールドプレート電極(ゲートフィールドプレート電極)
7 第1フィールドプレート電極(ゲートフィールドプレート電極)
8 第1フィールドプレート電極(ゲートフィールドプレート電極)
9 第3絶縁膜(層間絶縁膜)
10 第4絶縁膜(層間絶縁膜)
11 バッファ膜(第2絶縁膜)
12 素子分離領域
Claims (8)
- 素子領域と素子分離領域を有する半導体層と、
前記半導体層上に設けられた第1絶縁膜と、
前記第1絶縁膜上に設けられ、第1方向に延在する第1電極と、
前記半導体層上に設けられ、前記第1方向と交差する第2方向に並び、前記第1方向に延在する第2電極と、
前記半導体層上に設けられ、前記第2方向に並び、前記第1方向に延在する第3電極と、
前記第1絶縁膜と前記半導体層との間に設けられ、前記第3電極を前記第2方向に挟む第2絶縁膜と、
前記第1電極上に設けられ、前記第1電極と接続した第1フィールドプレート電極と、
前記第1フィールドプレート電極上に設けられ、前記第2電極と接続した第2フィールドプレート電極と、
前記第3電極上に設けられ、前記第3電極と接続した第3フィールドプレート電極と、を備え、
前記素子分離領域上から前記素子領域上の一部にまで前記第2絶縁膜が延在する半導体装置。 - 前記第2絶縁膜は、前記素子領域上の前記半導体層と前記第1電極の下の前記第1絶縁膜との間には設けられていない請求項1に記載の半導体装置。
- 前記第2絶縁膜は、前記素子分離領域の前記半導体層と前記第1電極の間に設けられている請求項1又は2に記載の半導体装置。
- 前記第2絶縁膜は前記第3電極と接した側面を有し、
前記第2絶縁膜の前記第3電極と接した側面とは反対側の側面は、前記第2方向において前記第2フィールドプレート電極と前記第3フィールドプレート電極の間に位置する請求項1ないし3のいずれか1項に記載の半導体装置。 - 前記第2絶縁膜は前記第3電極と接した側面を有し、
前記第2絶縁膜の前記第3電極と接した側面とは反対側の側面は、前記第2方向において前記第3フィールドプレート電極の前記第2フィールドプレート電極側の面から前記第2フィールドプレート電極に向かって0.1μm以上20μm以下の場所に位置する請求項1ないし4のいずれか1項に記載の半導体装置。 - 前記第2絶縁膜の厚さは20nm以上500nm以下である請求項1ないし5のいずれか1項に記載の半導体装置。
- 前記第1絶縁膜の密度(g/cm3)は、前記第2絶縁膜の密度(g/cm3)よりも高い請求項1ないし6のいずれか1項に記載の半導体装置。
- 前記第2絶縁膜は、前記第3電極を挟む部分において、前記素子領域と前記素子分離領域の境界から前記素子領域側に0.1μm以上3.0μm以下の距離の位置にまで設けられていて、
前記第2絶縁膜は、前記素子分離領域上で前記素子領域と前記素子分離領域の境界から前記素子分離領域側に0.1μm以上3.0μm以下の距離の位置にまで前記半導体層と前記第1電極の下の前記第1絶縁膜との間には設けられていない請求項1ないし7のいずれか1項に記載の半導体装置。
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JP2021046675A JP2022145319A (ja) | 2021-03-19 | 2021-03-19 | 半導体装置 |
CN202110842431.2A CN115117166A (zh) | 2021-03-19 | 2021-07-26 | 半导体装置 |
US17/471,076 US20220302294A1 (en) | 2021-03-19 | 2021-09-09 | Semiconductor device |
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JP5983999B2 (ja) * | 2012-06-29 | 2016-09-06 | 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 |
JP2016062982A (ja) * | 2014-09-16 | 2016-04-25 | 株式会社東芝 | 半導体装置 |
US9722063B1 (en) * | 2016-04-11 | 2017-08-01 | Power Integrations, Inc. | Protective insulator for HFET devices |
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2021
- 2021-03-19 JP JP2021046675A patent/JP2022145319A/ja active Pending
- 2021-07-26 CN CN202110842431.2A patent/CN115117166A/zh active Pending
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