JP2019102552A - ダイオード素子およびダイオード素子の製造方法 - Google Patents
ダイオード素子およびダイオード素子の製造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 229910002601 GaN Inorganic materials 0.000 claims abstract description 120
- 239000004065 semiconductor Substances 0.000 claims abstract description 106
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000002019 doping agent Substances 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 238000005530 etching Methods 0.000 claims description 7
- 238000005468 ion implantation Methods 0.000 abstract description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 16
- 238000000034 method Methods 0.000 description 9
- 230000004048 modification Effects 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 239000010931 gold Substances 0.000 description 6
- 239000011777 magnesium Substances 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 6
- 229910010271 silicon carbide Inorganic materials 0.000 description 6
- 239000010936 titanium Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 239000003550 marker Substances 0.000 description 4
- 238000002488 metal-organic chemical vapour deposition Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 238000002248 hydride vapour-phase epitaxy Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229910052698 phosphorus Inorganic materials 0.000 description 3
- 238000000206 photolithography Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- XCZXGTMEAKBVPV-UHFFFAOYSA-N trimethylgallium Chemical compound C[Ga](C)C XCZXGTMEAKBVPV-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000004075 alteration Effects 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
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- QBJCZLXULXFYCK-UHFFFAOYSA-N magnesium;cyclopenta-1,3-diene Chemical compound [Mg+2].C1C=CC=[C-]1.C1C=CC=[C-]1 QBJCZLXULXFYCK-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
[先行技術文献]
[特許文献]
[特許文献1] 特開2013−30618号公報
Claims (11)
- トレンチ構造を有し、ワイドギャップ半導体のエピタキシャル層である、第1導電型の半導体層と、
前記トレンチ構造の少なくとも側壁に接し、前記ワイドギャップ半導体のエピタキシャル層である、第2導電型の半導体層と、
前記第1導電型の半導体層および前記第2導電型の半導体層上において、前記第1導電型の半導体層および前記第2導電型の半導体層に接する電極と
を備える、ダイオード素子。 - 前記ワイドギャップ半導体は窒化ガリウムである
請求項1に記載のダイオード素子。 - 前記第1導電型はN型である
請求項1または2に記載のダイオード素子。 - 前記第2導電型の半導体層は前記トレンチ構造の底部全体に接する
請求項1から3のいずれか一項に記載のダイオード素子。 - 前記第2導電型の半導体層の厚さは、前記側壁の頂部から前記トレンチ構造の底部までの長さである前記トレンチ構造の深さよりも小さい
請求項1から4のいずれか一項に記載のダイオード素子。 - 前記第1導電型の半導体層は、
複数の前記トレンチ構造が互いに離間して配列される配列方向において、互いに隣接して設けられた第1のトレンチ構造および第2のトレンチ構造と、
前記配列方向において、前記第1のトレンチ構造と前記第2のトレンチ構造との間に位置するメサ構造と
を備え、
前記配列方向における前記メサ構造の幅は、0.5μm以上10μm以下である
請求項1から5のいずれか一項に記載のダイオード素子。 - 前記配列方向において互いに対向する前記トレンチ構造における第1の側壁と第2の側壁とであって、前記第1の側壁の頂部と前記第2の側壁の頂部との間の長さにより規定される前記トレンチ構造の幅は、1μm以上50μm以下である
請求項6に記載のダイオード素子。 - 前記トレンチ構造の幅は、前記配列方向における前記メサ構造の幅の1倍以上である
請求項6または7に記載のダイオード素子。 - 前記第1導電型の半導体層は、前記メサ構造の頂部と、前記トレンチ構造の側壁とにおいて、前記トレンチ構造の底部における第1導電型のドーパント濃度よりも高い第1導電型のドーパント濃度を有する高濃度領域を含む
請求項6から8のいずれか一項に記載のダイオード素子。 - 前記第2導電型の半導体層は、
前記第1導電型の半導体層と接する半導体接合領域と、
前記第2導電型の半導体層の厚さ方向において前記半導体接合領域とは反対側に位置し、前記電極と接する、金属接合領域と
を含み、
前記金属接合領域の第2導電型のドーパント濃度は、前記半導体接合領域の第2導電型のドーパント濃度よりも高い
請求項6から9のいずれか一項に記載のダイオード素子。 - ワイドギャップ半導体のエピタキシャル層である第1導電型の半導体層を部分的にエッチングすることにより、互いに離間して配列される複数のトレンチ構造を前記第1導電型の半導体層に形成する段階と、
前記複数のトレンチ構造が互いに離間して配列される配列方向において互いに隣接する各2つのトレンチ構造の間にそれぞれ位置する複数のメサ構造と、前記複数のトレンチ構造との上方に選択再成長用のマスクを設けることなく、前記第1導電型の半導体層上に、前記ワイドギャップ半導体である第2導電型の半導体層をエピタキシャル成長させる段階と、
前記複数のメサ構造上に位置する第2導電型の半導体層を部分的にエッチングすることにより、前記第1導電型の半導体層を部分的に露出させる段階と、
前記第1導電型の半導体層および前記第2導電型の半導体層上において、前記第1導電型の半導体層および前記第2導電型の半導体層に接する電極を形成する段階と
を備える、ダイオード素子の製造方法。
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US16/174,282 US10615293B2 (en) | 2017-11-29 | 2018-10-30 | Diode and method of manufacturing diode |
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JP2022051424A (ja) * | 2020-09-18 | 2022-03-31 | 株式会社東芝 | 半導体装置 |
WO2024122610A1 (ja) * | 2022-12-09 | 2024-06-13 | 株式会社タムラ製作所 | ジャンクションバリアショットキーダイオード及びその製造方法 |
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