JP6870304B2 - 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 description 38
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 230000004888 barrier function Effects 0.000 claims description 68
- 238000000034 method Methods 0.000 claims description 35
- 150000004767 nitrides Chemical class 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 15
- 239000000203 mixture Substances 0.000 description 35
- 229910002704 AlGaN Inorganic materials 0.000 description 22
- 239000013078 crystal Substances 0.000 description 19
- 235000012431 wafers Nutrition 0.000 description 19
- 239000002994 raw material Substances 0.000 description 12
- 230000007423 decrease Effects 0.000 description 8
- JLTRXTDYQLMHGR-UHFFFAOYSA-N trimethylaluminium Chemical compound C[Al](C)C JLTRXTDYQLMHGR-UHFFFAOYSA-N 0.000 description 8
- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000009751 slip forming Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000470 constituent Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 125000004429 atom Chemical group 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- IBEFSUTVZWZJEL-UHFFFAOYSA-N trimethylindium Chemical compound C[In](C)C IBEFSUTVZWZJEL-UHFFFAOYSA-N 0.000 description 4
- 238000001459 lithography Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 0 *C(***N)=C Chemical compound *C(***N)=C 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010574 gas phase reaction Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical group [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 150000003608 titanium Chemical class 0.000 description 1
- 230000005533 two-dimensional electron gas Effects 0.000 description 1
- 238000001947 vapour-phase growth Methods 0.000 description 1
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- 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
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Description
半絶縁性のSiC基板上に、TMA及びNH3を原料とするMOCVD法を用いて、成長温度1100℃でAlNバッファ層を成長した。AlNバッファ層の厚さは20nmであった。次に、TMG及びNH3を原料とするMOCVD法を用いて、成長温度1050℃でAlNバッファ層上にGaNチャネル層を成長した。GaNチャネル層の厚さは500nmであった。続いて、TMA及びNH3を原料として、成長温度700℃、圧力50TorrにてAlNスペーサ層を1nm形成し、TMA、TMI、TMG、及びNH3を原料として、成長温度700℃、圧力50TorrにてInAlGaNバリア層を成長した。InAlGaNバリア層の厚さは9nm、In組成は14%であった。続いて、成長温度を850℃へと変化させたのち、TMG及びNH3を原料として、厚さ3nmのGaNキャップ層をInAlNバリア層上に成長した。
上記実施例と同様の工程により、半絶縁性のSiC基板上にAlNバッファ層、GaNチャネル層、及びAlNスペーサ層を成長した。次に、TMA、TMI、及びNH3を原料として、成長温度700℃、圧力50TorrにてInAlNバリア層を成長した。InAlNバリア層の厚さは9nm、In組成は18%であった。
上記実施例と同様の工程により、半絶縁性のSiC基板上にAlNバッファ層、GaNチャネル層、及びAlNスペーサ層を成長した。次に、上記第1比較例と同様の工程により、InAlNバリア層を成長した。そして、成長温度を850℃へと変化させたのち、TMG及びNH3を原料として、厚さ3nmのGaNキャップ層をInAlNバリア層上に成長した。その後、上記第1比較例と同様の工程によりドレイン電極、ソース電極及びゲート電極を形成した。更に、SiNからなる表面保護膜を形成し、HEMTを完成した。
Claims (4)
- 高周波用窒化物半導体装置の製造方法であって、
基板上にバッファ層を成長させる第1工程と、
前記バッファ層上にGaNチャネル層を成長させる第2工程と、
前記GaNチャネル層上にInAlGaNバリア層を成長させる第3工程と、を備え、
前記第3工程において、前記第1工程及び前記第2工程よりも成長温度を低くし、前記InAlGaNバリア層のIn含有比率を多くとも14%とし、成長圧力を40Torr以上70Torr以下とし、前記InAlGaNバリア層の厚さは5nm以上15nm以下であり、
前記第2工程における成長温度を1000℃以上とし、
AlNスペーサ層を成長させる工程を、前記第2工程と前記第3工程との間に更に備え、
前記AlNスペーサ層を成長させる工程における成長温度を800℃以下とする、半導体装置の製造方法。 - 前記第3工程において、前記InAlGaNバリア層のIn含有比率を少なくとも10%とする、請求項1に記載の半導体装置の製造方法。
- 前記第1工程及び前記第2工程における成長温度を共に1000℃以上とし、前記第3工程における成長温度を800℃以下とする、請求項1または2に記載の半導体装置の製造方法。
- 前記InAlGaNバリア層上にGaNキャップ層を成長させる第4工程を更に備え、
前記第4工程における成長温度を800℃以上900℃以下とする、請求項1から3のいずれか一項に記載の半導体装置の製造方法。
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JP2016235755A JP6870304B2 (ja) | 2016-12-05 | 2016-12-05 | 半導体装置の製造方法 |
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JP6729416B2 (ja) * | 2017-01-19 | 2020-07-22 | 住友電気工業株式会社 | 窒化物半導体デバイス及び窒化物半導体デバイスの製造方法 |
WO2020137667A1 (ja) * | 2018-12-27 | 2020-07-02 | 住友電気工業株式会社 | 窒化物半導体デバイスの製造方法 |
JP7439536B2 (ja) * | 2020-01-28 | 2024-02-28 | 富士通株式会社 | 半導体装置 |
CN113066851A (zh) * | 2021-03-09 | 2021-07-02 | 吉林大学 | 一种InAlGaN/GaN异质结结构及其生长方法 |
CN118431263A (zh) * | 2024-06-28 | 2024-08-02 | 合肥欧益睿芯科技有限公司 | 含多层外延插入的外延片及制备方法、晶体管和射频器件 |
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US7714359B2 (en) * | 2005-02-17 | 2010-05-11 | Panasonic Corporation | Field effect transistor having nitride semiconductor layer |
EP1803789A1 (de) * | 2005-12-28 | 2007-07-04 | Novaled AG | Verwendung von Metallkomplexen als Emitter in einem elektronischen Bauelement und elektronisches Bauelement |
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