JP2017201685A - Hfet装置のための保護絶縁体 - Google Patents
Hfet装置のための保護絶縁体 Download PDFInfo
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- JP2017201685A JP2017201685A JP2017076521A JP2017076521A JP2017201685A JP 2017201685 A JP2017201685 A JP 2017201685A JP 2017076521 A JP2017076521 A JP 2017076521A JP 2017076521 A JP2017076521 A JP 2017076521A JP 2017201685 A JP2017201685 A JP 2017201685A
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- passivation layer
- field plate
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- 239000012212 insulator Substances 0.000 title abstract description 5
- 230000001681 protective effect Effects 0.000 title abstract description 4
- 238000002161 passivation Methods 0.000 claims abstract description 273
- 239000000463 material Substances 0.000 claims abstract description 110
- 239000004065 semiconductor Substances 0.000 claims abstract description 99
- 239000002131 composite material Substances 0.000 claims abstract description 98
- 230000005669 field effect Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 41
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- 239000002184 metal Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 229910044991 metal oxide Inorganic materials 0.000 claims description 4
- 150000004706 metal oxides Chemical class 0.000 claims description 4
- 238000009413 insulation Methods 0.000 abstract 2
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- 229910002601 GaN Inorganic materials 0.000 description 15
- 229910052581 Si3N4 Inorganic materials 0.000 description 14
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 13
- 230000005684 electric field Effects 0.000 description 7
- 238000001465 metallisation Methods 0.000 description 7
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- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 3
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
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- 229910002704 AlGaN Inorganic materials 0.000 description 2
- 229910000980 Aluminium gallium arsenide Inorganic materials 0.000 description 2
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 2
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- 229910052785 arsenic Inorganic materials 0.000 description 2
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- 150000001875 compounds Chemical class 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- -1 for example Chemical compound 0.000 description 2
- RPQDHPTXJYYUPQ-UHFFFAOYSA-N indium arsenide Chemical compound [In]#[As] RPQDHPTXJYYUPQ-UHFFFAOYSA-N 0.000 description 2
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- 230000007774 longterm Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
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- 238000007789 sealing Methods 0.000 description 2
- 230000005533 two-dimensional electron gas Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910008599 TiW Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
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- 230000004907 flux Effects 0.000 description 1
- CJNBYAVZURUTKZ-UHFFFAOYSA-N hafnium(iv) oxide Chemical compound O=[Hf]=O CJNBYAVZURUTKZ-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000004151 rapid thermal annealing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910001258 titanium gold Inorganic materials 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
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Abstract
Description
Claims (29)
- 第1の半導体材料と第2の半導体材料とヘテロ接合とであって、
前記ヘテロ接合が、前記第1の半導体材料と前記第2の半導体材料との間に配置される、
前記第1の半導体材料と前記第2の半導体材料と前記ヘテロ接合と、
複数の複合パッシベーション層であって、
前記複数の複合パッシベーション層における第1の複合パッシベーション層が、第1の絶縁層と第1のパッシベーション層とを含み、
前記複数の複合パッシベーション層における第2の複合パッシベーション層が、第2の絶縁層と第2のパッシベーション層とを含み、
前記第2のパッシベーション層が、前記第1の絶縁層と前記第2の絶縁層との間に配置される、
前記複数の複合パッシベーション層と、
前記第1のパッシベーション層と前記第2の半導体材料との間に配置されたゲート誘電体と、
前記ゲート誘電体と前記第1のパッシベーション層との間に配置された前記ゲート電極と、
前記第1のパッシベーション層と前記第2のパッシベーション層との間に配置された第1のゲートフィールドプレートと、
ソース電極とドレイン電極とであって、
前記ソース電極と前記ドレイン電極とが、前記第2の半導体材料に結合される、
前記ソース電極と前記ドレイン電極と、
ソースフィールドプレートであって、
前記ソースフィールドプレートが、前記ソース電極に結合される、
前記ソースフィールドプレートと、
を備える、高電圧電界効果トランジスタ(HFET)。 - 前記第1のゲートフィールドプレートが、前記ゲート電極に接続される、
請求項1に記載のHFET。 - 第3のパッシベーション層をさらに備え、
前記第2の絶縁層が、前記第2のパッシベーション層と前記第3のパッシベーション層との間に配置される、
請求項1に記載のHFET。 - 前記第2の絶縁層と前記第3のパッシベーション層との間に配置された第2のゲートフィールドプレートをさらに備える、
請求項3に記載のHFET。 - 前記ソースフィールドプレートが、前記第2のパッシベーション層と前記第3のパッシベーション層との間に配置され、
前記第1のゲートフィールドプレートが、前記第1の絶縁層と前記第2のパッシベーション層との間に配置される、
請求項3に記載のHFET。 - 前記第1の絶縁層の横境界が、前記ソースフィールドプレートの横境界と実質的に同一の範囲に広がり、
前記第2の絶縁層の横境界が、前記ソースフィールドプレートの前記横境界と実質的に同一の範囲に広がる、
請求項5に記載のHFET。 - 前記第3のパッシベーション層と第3の絶縁層とを含む第3の複合パッシベーション層と、
第4のパッシベーション層であって、
前記第3の絶縁層が、前記第3のパッシベーション層と前記第4のパッシベーション層との間に配置される、
前記第4のパッシベーション層と、
前記第1のゲートフィールドプレートに結合された第2のゲートフィールドプレートであって、
前記第2のゲートフィールドプレートが、前記第2のパッシベーション層と前記第3のパッシベーション層との間に配置され、
前記ソースフィールドプレートが、前記第3のパッシベーション層と前記第4のパッシベーション層との間に配置される、
前記第2のゲートフィールドプレートと、
をさらに備える、請求項3に記載のHFET。 - 前記第2のゲートフィールドプレートに結合され、前記第3のパッシベーション層と前記第4のパッシベーション層との間に配置された、第3のゲートフィールドプレートをさらに備える、
請求項7に記載のHFET。 - 前記第1の絶縁層の横境界が、前記第1のゲートフィールドプレートの横境界と実質的に同一の範囲に広がり、
前記第2の絶縁層の横境界が、前記第2のゲートフィールドプレートの横境界と実質的に同一の範囲に広がり、
前記第3の絶縁層の横境界が、前記ソースフィールドプレートの横境界と実質的に同一の範囲に広がる、
請求項7に記載のHFET。 - 前記複数の複合パッシベーション層における前記ゲート誘電体と前記第1の絶縁層とが、同じ材料組成を含む、
請求項1に記載のHFET。 - 前記複数の複合パッシベーション層における前記第1のパッシベーション層と前記第2のパッシベーション層とが、SiNを含み、
前記ゲート誘電体と前記第1の絶縁層とが、金属酸化物を含む、
請求項1に記載のHFET。 - 前記複数の複合パッシベーション層における絶縁層が、前記複数の複合パッシベーション層におけるパッシベーション層の充電を防ぐために配置される、
請求項1に記載のHFET。 - 前記ドレイン電極が、前記第2の半導体材料から、前記複数の複合パッシベーション層の少なくとも1つを通って延びる、
請求項1に記載のHFET。 - 第1の半導体材料と第2の半導体材料とヘテロ接合とであって、
前記ヘテロ接合が、前記第1の半導体材料と前記第2の半導体材料との間に配置される、
前記第1の半導体材料と前記第2の半導体材料と前記ヘテロ接合と、
第1の複合パッシベーション層と第2の複合パッシベーション層と第3の複合パッシベーション層とを含む複数の複合パッシベーション層であって、
前記第1の複合パッシベーション層が、第1の絶縁層と第1のパッシベーション層とを含み、
前記第1のパッシベーション層が、前記第2の半導体材料と前記第1の絶縁層との間に配置され、
前記第2の複合パッシベーション層が、第2の絶縁層と第2のパッシベーション層とを含み、
前記第2のパッシベーション層が、前記第1の絶縁層と前記第2の絶縁層との間に配置され、
前記第3の複合パッシベーション層が、第3の絶縁層と第3のパッシベーション層とを含み、
前記第3のパッシベーション層が、前記第2の絶縁層と前記第3の絶縁層との間に配置される、
前記複数の複合パッシベーション層と、
前記第1のパッシベーション層と前記第2のパッシベーション層との間に配置された第1のゲートフィールドプレートと、
前記第1のゲートフィールドプレートに結合された第2のゲートフィールドプレートであって、
前記第2のゲートフィールドプレートが、前記第2のパッシベーション層から前記第3の絶縁層を通って延びる、
前記第2のゲートフィールドプレートと、
を備える、高電圧電界効果トランジスタ(HFET)。 - 前記第1のパッシベーション層と前記第2の半導体材料との間に配置されたゲート誘電体と、
前記ゲート誘電体と前記第1のパッシベーション層との間に配置されたゲート電極と、
をさらに備える、請求項14に記載のHFET。 - 第4のパッシベーション層をさらに備え、
前記第3の絶縁層が、前記第4のパッシベーション層と前記第3のパッシベーション層との間に配置され、
前記第2のゲートフィールドプレートが、前記第2のパッシベーション層から、前記第2の絶縁層を通り、前記第3のパッシベーション層を通り、前記第4のパッシベーション層内まで延びる、
請求項14に記載のHFET。 - 前記第2のゲートフィールドプレートが、金属を含み、連続している、
請求項14に記載のHFET。 - ソース電極に結合されたソースフィールドプレートをさらに備え、
前記第3のパッシベーション層が、前記ソースフィールドプレートと前記第2の絶縁層との間に配置される、
請求項14に記載のHFET。 - 第1の半導体材料と第2の半導体材料との間にヘテロ接合を形成することと、
ソース電極とドレイン電極とを形成することであって、
前記ソース電極と前記ドレイン電極とが、前記第2の半導体材料に結合される、
前記ソース電極と前記ドレイン電極とを形成することと、
ゲート誘電体を堆積させることであって、
前記第2の半導体材料が、前記ゲート誘電体と前記第1の半導体材料との間に配置される、
前記ゲート誘電体を堆積させることと、
複数の複合パッシベーション層を堆積させることであって、
前記複数の複合パッシベーション層における第1の複合パッシベーション層が、第1の絶縁層と第1のパッシベーション層とを含み、
前記第1のパッシベーション層が、前記ゲート誘電体と前記第1の絶縁層との間に配置される、
前記複数の複合パッシベーション層を堆積させることと、
前記ゲート誘電体と前記複数の複合パッシベーション層との間にゲート電極を形成することと、
第2の絶縁層と第2のパッシベーション層とを含む、前記複数の複合パッシベーション層における第2の複合パッシベーション層を堆積させることであって、
前記第2のパッシベーション層が、前記第1の絶縁層と前記第2の絶縁層との間に配置される、
前記第2の複合パッシベーション層を堆積させることと、
前記第1のパッシベーション層と前記第2のパッシベーション層との間に第1のゲートフィールドプレートを形成することと、
を含む、高電圧電界効果トランジスタ(HFET)の製造方法。 - 前記第1の絶縁層が、前記第1のパッシベーション層より大きなバンドギャップをもつ、
請求項19に記載の方法。 - 前記第1のゲートフィールドプレートが、前記ゲート電極に接続される、
請求項19に記載の方法。 - 前記第2の絶縁層上にソースフィールドプレートを形成することをさらに含む、
請求項19に記載の方法。 - 前記第1のゲートフィールドプレートに結合された第2のゲートフィールドプレートを形成することをさらに含み、
前記第2のゲートフィールドプレートが、前記第2の絶縁層上に配置される、
請求項19に記載の方法。 - 前記複数の複合パッシベーション層を堆積させることが、前記第1の絶縁層と前記第2の絶縁層との横境界が、前記ソース電極と前記ドレイン電極との間の横方向距離未満であるように、前記第1の絶縁層と前記第2の絶縁層とを堆積させることを含む、
請求項19に記載の方法。 - 第3の絶縁層と第3のパッシベーション層とを含む第3の複合パッシベーション層を堆積させることであって、
前記第3のパッシベーション層が、前記第2の絶縁層と前記第3の絶縁層との間に配置される、
前記第3の複合パッシベーション層を堆積させることと、
前記第1のゲートフィールドプレートに結合された第2のゲートフィールドプレートを形成することであって、
前記第2のゲートフィールドプレートが、前記第2のパッシベーション層と前記第3のパッシベーション層との間に配置される、
前記第2のゲートフィールドプレートを形成することと、
ソースフィールドプレートを形成することであって、
前記第3のパッシベーション層が、前記ソースフィールドプレートと前記第2の絶縁層との間に配置される、
前記ソースフィールドプレートを形成することと、
をさらに含む、請求項19に記載の方法。 - 前記第2のゲートフィールドプレートに結合され、前記第3の絶縁層上に配置された第3のゲートフィールドプレートを形成することをさらに含む、
請求項25に記載の方法。 - 第4のパッシベーション層を堆積させることをさらに含み、
前記第4のパッシベーション層が、前記ソースフィールドプレートと前記第3の絶縁層との上に配置される、
請求項25に記載の方法。 - 前記第1のゲートフィールドプレートが、前記第1の絶縁層と前記第2のパッシベーション層との間に配置される、
請求項20に記載の方法。 - 前記第1のパッシベーション層が、SiNを含み、前記ゲート誘電体と前記第1の絶縁層とが、金属酸化物を含む、
請求項20に記載の方法。
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JP2022030079A (ja) * | 2020-08-06 | 2022-02-18 | 株式会社東芝 | 半導体装置 |
JP7332548B2 (ja) | 2020-08-06 | 2023-08-23 | 株式会社東芝 | 半導体装置 |
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EP3712956A1 (en) | 2020-09-23 |
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CN107424962A (zh) | 2017-12-01 |
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CN114758992A (zh) | 2022-07-15 |
JP2021193743A (ja) | 2021-12-23 |
CN107424962B (zh) | 2022-03-18 |
US20170294532A1 (en) | 2017-10-12 |
US20220013660A1 (en) | 2022-01-13 |
US10629719B2 (en) | 2020-04-21 |
JP7336493B2 (ja) | 2023-08-31 |
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