JP6139340B2 - 半導体装置およびその製造方法 - Google Patents
半導体装置およびその製造方法 Download PDFInfo
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- JP6139340B2 JP6139340B2 JP2013182560A JP2013182560A JP6139340B2 JP 6139340 B2 JP6139340 B2 JP 6139340B2 JP 2013182560 A JP2013182560 A JP 2013182560A JP 2013182560 A JP2013182560 A JP 2013182560A JP 6139340 B2 JP6139340 B2 JP 6139340B2
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- 239000004065 semiconductor Substances 0.000 title claims description 494
- 238000004519 manufacturing process Methods 0.000 title claims description 48
- 229910003460 diamond Inorganic materials 0.000 claims description 407
- 239000010432 diamond Substances 0.000 claims description 407
- 239000012535 impurity Substances 0.000 claims description 55
- 238000000034 method Methods 0.000 claims description 47
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 20
- 229910052698 phosphorus Inorganic materials 0.000 claims description 20
- 239000011574 phosphorus Substances 0.000 claims description 20
- 238000005530 etching Methods 0.000 claims description 11
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 30
- 239000010936 titanium Substances 0.000 description 24
- 230000015556 catabolic process Effects 0.000 description 21
- 239000010931 gold Substances 0.000 description 20
- 238000005229 chemical vapour deposition Methods 0.000 description 19
- 239000000758 substrate Substances 0.000 description 18
- 238000001020 plasma etching Methods 0.000 description 15
- 229910052751 metal Inorganic materials 0.000 description 14
- 239000002184 metal Substances 0.000 description 14
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 12
- 229910052719 titanium Inorganic materials 0.000 description 12
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 11
- 230000001681 protective effect Effects 0.000 description 11
- 238000005566 electron beam evaporation Methods 0.000 description 10
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 10
- 229910052737 gold Inorganic materials 0.000 description 10
- 238000001459 lithography Methods 0.000 description 10
- 229910052697 platinum Inorganic materials 0.000 description 10
- 230000005684 electric field Effects 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 7
- 229910052796 boron Inorganic materials 0.000 description 7
- 238000010348 incorporation Methods 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 238000000137 annealing Methods 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 238000000151 deposition Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052581 Si3N4 Inorganic materials 0.000 description 4
- 239000002019 doping agent Substances 0.000 description 4
- 238000001004 secondary ion mass spectrometry Methods 0.000 description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Description
本実施形態の半導体装置は、i型またはp型の第1のダイヤモンド半導体層と、第1のダイヤモンド半導体層上に設けられるn型の第2のダイヤモンド半導体層と、第1のダイヤモンド半導体層と第2のダイヤモンド半導体層とを含むように設けられ、上面が{100}面から±10度以内の面方位を有し、側面が{100}面から<011>±20度の方向に対し20度以上90度以下傾斜するメサ構造と、側面に設けられ、第2のダイヤモンド半導体層と接し、第2のダイヤモンド半導体層よりn型の不純物濃度が低いn型の第1のダイヤモンド半導体領域と、を備える。そして、第1のダイヤモンド半導体層の、第2のダイヤモンド半導体層と反対側に設けられ、第1のダイヤモンド半導体層よりp型の不純物濃度が高いp型の第3のダイヤモンド半導体層を、さらに備える
<111>方向への成長とする。このため、n型不純物、例えば、リン(P)の取り込み効率が向上し、不純物濃度の制御性が向上する。
本実施形態の半導体装置は、メサ構造周囲の第1のダイヤモンド半導体層表面に設けられ、第2のダイヤモンド半導体層よりn型の不純物濃度が低いn型の複数の第2のダイヤモンド半導体領域を、さらに備えること以外は、第1の実施形態と同様である。したがって、第1の実施形態と重複する内容については、記述を省略する。
本実施形態の半導体装置は、第1のダイヤモンド半導体領域と第2のダイヤモンド半導体領域が接していること以外は、第2の実施形態と同様である。したがって、第1の実施形態と重複する内容については、記述を省略する。
本実施形態の半導体装置は、第2のダイヤモンド半導体層上に設けられるp型の第3のダイヤモンド半導体層と、第3のダイヤモンド半導体層に電気的に接続される第3の電極を、さらに備える点で、第1の形態と異なっている。第1の実施形態と重複する内容については、記述を省略する。
第2の実施形態の構造のPINダイオードを作成した。
第3の実施形態の構造のPINダイオードを作成した。
第3の実施形態の構造のバイポーラトランジスタを作成した。
14 第1のダイヤモンド半導体層
16 第2のダイヤモンド半導体層
18 第1のダイヤモンド半導体領域
20 第1の電極(カソード電極)
22 第2の電極(アノード電極)
26 第2のダイヤモンド半導体領域
28 溝
30 第3の半導体領域
40 第4のダイヤモンド半導体層
50 第1の電極(ベース電極)
52 第2の電極(コレクタ電極)
54 第3の電極(エミッタ電極)
Claims (16)
- i型またはp型の第1のダイヤモンド半導体層と、
前記第1のダイヤモンド半導体層上に設けられるn型の第2のダイヤモンド半導体層と、
前記第1のダイヤモンド半導体層と前記第2のダイヤモンド半導体層とを含むように設けられ、上面が{100}面から±10度以内の面方位を有し、側面が{100}面から<011>±20度の方向に対し20度以上90度以下傾斜するメサ構造と、
前記側面に設けられ、前記第2のダイヤモンド半導体層と接し、前記第2のダイヤモンド半導体層よりn型の不純物濃度が低いn型の第1のダイヤモンド半導体領域と、
を備えることを特徴とする半導体装置。 - 前記第1のダイヤモンド半導体層の、前記第2のダイヤモンド半導体層と反対側に設けられ、前記第1のダイヤモンド半導体層よりp型の不純物濃度が高いp型の第3のダイヤモンド半導体層を、さらに備えることを特徴とする請求項1記載の半導体装置。
- 前記メサ構造周囲の前記第1のダイヤモンド半導体層表面に設けられ、前記第2のダイヤモンド半導体層よりn型の不純物濃度が低いn型の複数の第2のダイヤモンド半導体領域を、さらに備えることを特徴とする請求項1または請求項2記載の半導体装置。
- 前記第1のダイヤモンド半導体領域のn型の不純物がリン(P)であり、リン濃度が1×1015atoms/cm3以上5×1018atoms/cm3以下であることを特徴とする請求項1ないし請求項3いずれか一項記載の半導体装置。
- 前記第1のダイヤモンド半導体領域と前記第2のダイヤモンド半導体領域が接していることを特徴とする請求項3記載の半導体装置。
- 前記第1のダイヤモンド半導体層に電気的に接続される第1の電極と、前記第2のダイヤモンド半導体層に電気的に接続される第2の電極とを、さらに備えることを特徴とする請求項1ないし5いずれか一項記載の半導体装置。
- 前記側面が、{100}面から<011>±20度の方向に対し45度以上65度以下傾斜する面方位を有することを特徴とする請求項1ないし請求項6いずれか一項記載の半導体装置。
- 前記第2のダイヤモンド半導体層上に設けられるp型の第4のダイヤモンド半導体層を、さらに備えることを特徴とする請求項1ないし請求項7いずれか一項記載の半導体装置。
- 前記第4のダイヤモンド半導体層に電気的に接続される第3の電極を、さらに備えることを特徴とする請求項8記載の半導体装置。
- 前記上面と前記側面の角部に、前記第1のダイヤモンド半導体領域が設けられることを特徴とする請求項1ないし請求項9いずれか一項記載の半導体装置。
- i型またはp型の第1のダイヤモンド半導体層をエピタキシャル成長によって形成し、
前記第1のダイヤモンド半導体層上にn型の第2のダイヤモンド半導体層をエピタキシャル成長によって形成し、
前記第1のダイヤモンド半導体層と前記第2のダイヤモンド半導体層とを含むように設けられ、上面が{100}面から±10度以内の面方位を有し、側面が{100}面から<011>±20度の方向に対し20度以上90度以下傾斜する面方位を有するメサ構造をエッチングにより形成し、
前記側面上に、前記第2のダイヤモンド半導体層と接し、前記第2のダイヤモンド半導体層よりn型の不純物濃度が低いn型の第1のダイヤモンド半導体領域をエピタキシャル成長により形成することを特徴とする半導体装置の製造方法。 - 前記第1のダイヤモンド半導体層よりp型の不純物濃度が高いp型の第3のダイヤモンド半導体層上に、前記第1のダイヤモンド半導体層を形成することを特徴とする請求項11記載の半導体装置の製造方法。
- 前記メサ構造を形成後、前記第1のダイヤモンド半導体領域の形成前に、前記メサ構造周囲の前記第1のダイヤモンド半導体層表面に複数の溝を形成し、
前記第1のダイヤモンド半導体領域の形成時に、前記溝内に、前記第2のダイヤモンド半導体層よりn型の不純物濃度が低いn型の複数の第2のダイヤモンド半導体領域を、さらに形成することを特徴とする請求項11または請求項12記載の半導体装置の製造方法。 - 前記第1のダイヤモンド半導体領域のn型の不純物がリン(P)であり、リン濃度が1×1015atoms/cm3以上5×1018atoms/cm3以下であることを特徴とする請求項11ないし請求項13いずれか一項記載の半導体装置の製造方法。
- 前記第1のダイヤモンド半導体領域と前記第2のダイヤモンド半導体領域が接するよう形成することを特徴とする請求項13記載の半導体装置の製造方法。
- 前記メサ構造を形成後、前記第1のダイヤモンド半導体領域の形成前に、前記側面上に、i型またはp型の第3の半導体領域をエピタキシャル成長により形成することを特徴とする請求項11ないし請求項15いずれか一項記載の半導体装置の製造方法。
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