JP7473075B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP7473075B2 JP7473075B2 JP2023507184A JP2023507184A JP7473075B2 JP 7473075 B2 JP7473075 B2 JP 7473075B2 JP 2023507184 A JP2023507184 A JP 2023507184A JP 2023507184 A JP2023507184 A JP 2023507184A JP 7473075 B2 JP7473075 B2 JP 7473075B2
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- 239000004065 semiconductor Substances 0.000 title claims description 236
- 229910052739 hydrogen Inorganic materials 0.000 claims description 222
- 239000001257 hydrogen Substances 0.000 claims description 222
- 239000000758 substrate Substances 0.000 claims description 182
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 173
- 238000009826 distribution Methods 0.000 claims description 71
- 239000000126 substance Substances 0.000 claims description 53
- 230000007423 decrease Effects 0.000 claims description 11
- 239000000386 donor Substances 0.000 description 115
- -1 hydrogen ions Chemical class 0.000 description 46
- 239000000370 acceptor Substances 0.000 description 31
- 230000007547 defect Effects 0.000 description 29
- 238000000034 method Methods 0.000 description 26
- 239000000852 hydrogen donor Substances 0.000 description 15
- 239000011229 interlayer Substances 0.000 description 14
- 150000002500 ions Chemical class 0.000 description 14
- 230000002093 peripheral effect Effects 0.000 description 14
- 239000012535 impurity Substances 0.000 description 11
- 238000000137 annealing Methods 0.000 description 10
- 125000004429 atom Chemical group 0.000 description 10
- 239000010410 layer Substances 0.000 description 10
- 238000009825 accumulation Methods 0.000 description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 229910052698 phosphorus Inorganic materials 0.000 description 8
- 239000011574 phosphorus Substances 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 6
- 239000002019 doping agent Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000005684 electric field Effects 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000000969 carrier Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 4
- 229920005591 polysilicon Polymers 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- 229910052785 arsenic Inorganic materials 0.000 description 2
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 2
- 238000005468 ion implantation Methods 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000001004 secondary ion mass spectrometry Methods 0.000 description 2
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000005368 silicate glass Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 150000003609 titanium compounds Chemical class 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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Description
特許文献1 米国特許出願公開第2014/217463号明細書
nc=εs×Ec/q
ただし、εsは半導体基板10を形成する材料の誘電率であり、qは電荷素量であり、Ecは半導体基板10の絶縁破壊電界強度である。例えば半導体基板10がシリコン基板の場合、Ecは1.8×105~2.5×105(V/cm)であり、ncは1.2×1012~1.6×1012(/cm2)である。
また、コレクタ電極24およびエミッタ電極52間に順バイアスが印加され、電界強度の最大値が半導体基板10の絶縁破壊電界強度に達してアバランシェ降伏が発生した場合において、ドリフト領域18の特定位置までが空乏化する場合に、ゲートトレンチ部40の下端から当該特定位置までドナー濃度を積分した値が、臨界積分濃度に対応する。
Claims (17)
- 全体にバルク・ドナーが分布した半導体基板と、
前記半導体基板に設けられ、水素のドーズ量が3×1015/cm2以上である高濃度水素ピークと、
前記半導体基板の深さ方向において前記高濃度水素ピークと重なる位置を含み、バルク・ドナー濃度よりもドナー濃度が高い高濃度領域と、
前記深さ方向において前記高濃度水素ピークと重なる位置に設けられ、キャリアライフタイムが極小値を示すライフタイム調整部と
を備える半導体装置。 - 前記高濃度水素ピークの水素のドーズ量が1×1016/cm2以上である
請求項1に記載の半導体装置。 - 前記高濃度水素ピークの水素化学濃度が、2×1018/cm3以上である
請求項1または2に記載の半導体装置。 - 前記高濃度領域の前記深さ方向のキャリア密度分布は、前記高濃度水素ピークと重なる位置に配置された谷と、前記谷に隣り合って配置されたピークとを含む
請求項1から3のいずれか一項に記載の半導体装置。 - 前記高濃度水素ピークを、前記深さ方向の異なる位置に複数備える
請求項1から4のいずれか一項に記載の半導体装置。 - 前記高濃度水素ピークの前記深さ方向の半値全幅内におけるキャリア密度が、谷またはキンクを有する
請求項1から5のいずれか一項に記載の半導体装置。 - 前記高濃度水素ピークにおける頂点とは異なる位置に、キャリア密度ピークの頂点が配置されている
請求項1から6のいずれか一項に記載の半導体装置。 - 前記半導体基板の上面に設けられたゲート構造を更に備え、
前記高濃度水素ピークは、前記半導体基板の下面に向かって水素化学濃度が減少する下側裾と、前記半導体基板の上面に向かって前記下側裾よりも前記水素化学濃度が急峻に減少する上側裾とを含む
請求項1に記載の半導体装置。 - 前記高濃度水素ピークは、前記半導体基板の下面側の領域に配置されている
請求項8に記載の半導体装置。 - 前記半導体基板の上面に設けられたトレンチ部を更に備え、
前記半導体基板は、前記トレンチ部の下端から前記半導体基板の下面に向かってドナー濃度を積分した積分値が、前記半導体基板の臨界積分濃度に達する臨界深さ位置を有し、
前記高濃度水素ピークの頂点が、前記臨界深さ位置よりも前記半導体基板の下面側に配置されている
請求項8または9に記載の半導体装置。 - 前記深さ方向における空孔密度分布は、
前記深さ方向において前記高濃度水素ピークと重なって配置された空孔密度ピークと、
前記空孔密度ピークよりも前記半導体基板の下面側に配置された下側平坦部と、
前記空孔密度ピークよりも前記半導体基板の上面側に配置され、前記下側平坦部よりも低密度の上側平坦部と
を有する請求項8から10のいずれか一項に記載の半導体装置。 - 前記空孔密度ピークの前記深さ方向における半値全幅は、前記高濃度水素ピークの前記深さ方向の半値全幅よりも小さい
請求項11に記載の半導体装置。 - 前記高濃度水素ピークよりも前記半導体基板の上面側に配置され、ドナー濃度がピークを示す上面側ドナーピークと、
前記深さ方向において前記上面側ドナーピークと重なる位置に設けられ、水素のドーズ量が3×1015/cm2より小さい低濃度水素ピークと
を更に備える請求項8から12のいずれか一項に記載の半導体装置。 - 前記低濃度水素ピークの前記深さ方向の半値全幅内におけるキャリアライフタイムは、極小値を有さない
請求項13に記載の半導体装置。 - 前記低濃度水素ピークが設けられた深さ位置における前記低濃度水素ピークの濃度に対する空孔濃度の比が、前記高濃度水素ピークが設けられた深さ位置における前記高濃度水素ピークの濃度に対する空孔濃度の比よりも小さい
請求項13または14に記載の半導体装置。 - 前記高濃度水素ピークの半値全幅の範囲と、前記低濃度水素ピークの半値全幅の範囲とが互いに離れている
請求項13から15のいずれか一項に記載の半導体装置。 - 前記半導体基板の下面に接して設けられ、アクセプタ濃度ピークを有するコレクタ領域を更に備え、
前記アクセプタ濃度ピークの半値全幅の範囲と、前記高濃度水素ピークの半値全幅の範囲とが互いに離れている
請求項8から16のいずれか一項に記載の半導体装置。
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