JP2013135213A - 半導体素子及びその製造方法 - Google Patents
半導体素子及びその製造方法 Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 163
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 239000012535 impurity Substances 0.000 claims abstract description 171
- 239000000758 substrate Substances 0.000 claims abstract description 105
- 238000000034 method Methods 0.000 claims abstract description 45
- 230000008569 process Effects 0.000 claims abstract description 32
- 229910052751 metal Inorganic materials 0.000 claims description 52
- 239000002184 metal Substances 0.000 claims description 52
- 239000004020 conductor Substances 0.000 claims description 21
- 150000002500 ions Chemical class 0.000 claims description 19
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 9
- 229920005591 polysilicon Polymers 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910021478 group 5 element Inorganic materials 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 238000005498 polishing Methods 0.000 claims description 5
- 238000005530 etching Methods 0.000 claims description 4
- 230000004913 activation Effects 0.000 abstract description 12
- 239000010408 film Substances 0.000 description 70
- 238000009792 diffusion process Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005468 ion implantation Methods 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000005224 laser annealing 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
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
【解決手段】本発明は、前面及び背面を有し、上記前面からp型不純物領域、低濃度n型不純物領域及びn型不純物領域を有し、上記n型不純物領域内に高濃度p型不純物領域を有し、上記n型不純物領域及び上記高濃度p型不純物領域は、上記背面に露出した半導体基板と、上記半導体基板に垂直形成されて上記半導体基板の前面に開口され、下部が上記高濃度p型不純物領域に接続されたディープトレンチと、を含むことを特徴とする。また、p型不純物の活性化率を増加させ、薄膜工程の際に破損を防止することができる。
【選択図】図1
Description
11 半導体基板の前面
12 半導体基板の背面
20 ディープトレンチ
30 ゲートトレンチ
21、31 酸化膜
22、32 導電性物質
41、42 高濃度n型不純物領域(n+)
50 p型不純物領域(p)
60、80 n型不純物領域(n)
70 低濃度n型不純物領域(n−)
90 高濃度p型不純物領域(p+)
100 前面金属膜
110 背面金属膜
Claims (37)
- 第1面及び第2面を有し、前記第1面側からp型不純物領域、低濃度n型不純物領域及びn型不純物領域を順に有し、前記n型不純物領域内に高濃度p型不純物領域を有し、前記n型不純物領域及び前記高濃度p型不純物領域は、前記第2面に露出した半導体基板と、
前記半導体基板に垂直形成されて前記半導体基板の第1面に開口され、底部が前記高濃度p型不純物領域に接続されたディープトレンチと
を含む、半導体素子。 - 前記半導体基板は、半導体ウェハである、請求項1に記載の半導体素子。
- 前記p型不純物領域と前記低濃度n型不純物領域との間にn型不純物領域を有する、請求項1または2に記載の半導体素子。
- 前記ディープトレンチの内部壁に酸化膜が形成される、請求項1から3の何れか1項に記載の半導体素子。
- 前記酸化膜は、前記半導体基板の第1面の外部に突出する、請求項4に記載の半導体素子。
- 前記酸化膜は、シリコン酸化物である、請求項4または5に記載の半導体素子。
- 前記ディープトレンチの内部に導電性物質が充填される、請求項1から6の何れか1項に記載の半導体素子。
- 前記導電性物質は、ポリシリコンを含む、請求項7に記載の半導体素子。
- 前記半導体基板の第1面に開口されたゲートトレンチが前記ディープトレンチの間に形成され、前記ゲートトレンチの底部は、前記低濃度n型不純物領域に接続される、請求項1から8の何れか1項に記載の半導体素子。
- 前記ゲートトレンチの内部壁に酸化膜が形成される、請求項9に記載の半導体素子。
- 前記酸化膜の一部は、前記半導体基板の第1面の外部に突出する、請求項10に記載の半導体素子。
- 突出した前記酸化膜の一部は、前記半導体基板の第1面の一部に延長されて形成される、請求項11に記載の半導体素子。
- 前記酸化膜は、シリコン酸化物である、請求項10から12の何れか1項に記載の半導体素子。
- 前記ゲートトレンチの内部に導電性物質が充填される、請求項9から13の何れか1項に記載の半導体素子。
- 前記導電性物質は、ポリシリコンを含む、請求項14に記載の半導体素子。
- 前記半導体基板の第1面の前記ゲートトレンチの開口周囲に高濃度p型またはn型不純物領域が形成される、請求項9から15の何れか1項に記載の半導体素子。
- 前記n型不純物は、5族元素を含む、請求項1から16の何れか1項に記載の半導体素子。
- 前記p型不純物は、3族元素を含む、請求項1から17の何れか1項に記載の半導体素子。
- 前記半導体基板の第1面にエミッタ電極として機能する第1面金属膜が形成される、請求項1から18の何れか1項に記載の半導体素子。
- 前記第1面金属膜は、アルミニウム(aluminum)またはチタン(titanium)を含む、請求項19に記載の半導体素子。
- 前記半導体基板の第2面にコレクタ電極として機能する第2面金属膜が形成される、請求項1から20の何れか1項に記載の半導体素子。
- 前記第2面金属膜は、ニッケル(nickel)または銀(silver)を含む、請求項21に記載の半導体素子。
- 第1面及び第2面を有し、n型不純物で低濃度ドーピングされて、低濃度n型不純物領域を有する半導体基板を用意する半導体基板の用意段階と、
前記半導体基板に垂直形成されて前記半導体基板の第1面に開口されたディープトレンチを形成するディープトレンチの形成段階と、
前記ディープトレンチの底面にn型不純物イオンを注入した後、熱処理してn型不純物領域を形成するn型不純物領域の形成段階と、
前記ディープトレンチの底面にp型不純物イオンを注入し後、熱処理して前記n型不純物領域内に高濃度p型不純物領域を形成する高濃度p型不純物領域の形成段階と、
前記半導体基板の第1面にエミッタ電極として機能する第1面金属膜を形成する第1面金属膜の形成段階と
を含む、半導体素子の製造方法。 - 前記ディープトレンチを形成する段階において、前記ディープトレンチは、エッチング工程によって形成される、請求項23に記載の半導体素子の製造方法。
- 前記n型不純物領域を形成する段階において、前記熱処理は800〜1200℃で行われる、請求項23または24に記載の半導体素子の製造方法。
- 前記高濃度p型不純物領域を形成する段階において、前記熱処理は800〜1200℃で行われる、請求項23から25の何れか1項に記載の半導体素子の製造方法。
- 前記第1面金属膜は、アルミニウム(aluminum)またはチタン(titanium)で形成される、請求項23から26の何れか1項に記載の半導体素子の製造方法。
- 前記n型不純物は、5族元素を含む、請求項23から27の何れか1項に記載の半導体素子の製造方法。
- 前記p型不純物は、3族元素を含む、請求項23から28の何れか1項に記載の半導体素子の製造方法。
- 前記半導体基板は、半導体ウェハである、請求項23から29の何れか1項に記載の半導体素子の製造方法。
- 前記高濃度p型不純物領域の形成段階の後、前記半導体基板の第1面に開口され、前記低濃度n型不純物領域に接続されたゲートトレンチを形成するゲートトレンチの形成段階をさらに含む、請求項23から30の何れか1項に記載の半導体素子の製造方法。
- 前記ゲートトレンチの形成段階の後、前記ディープトレンチ及び前記ゲートトレンチの内部に酸化膜を形成する酸化膜の形成段階をさらに含む、請求項31に記載の半導体素子の製造方法。
- 前記酸化膜の形成段階の後、前記ディープトレンチ及び前記ゲートトレンチの内部に導電性物質を埋め込むトレンチの埋め込み段階をさらに含む、請求項32に記載の半導体素子の製造方法。
- 前記導電性物質は、ポリシリコンを含む、請求項33に記載の半導体素子の製造方法。
- 前記トレンチの埋め込み段階の後、前記半導体基板の第2面を研磨して前記n型不純物領域及び前記p型不純物領域を露出させる第2面加工段階をさらに含む、請求項33または34に記載の半導体素子の製造方法。
- 前記第2面加工段階の後、前記半導体基板の第2面にコレクタ電極として機能する第2面金属膜を形成する第2面金属膜の形成段階をさらに含む、請求項35に記載の半導体素子の製造方法。
- 前記第2面金属膜は、ニッケル(nickel)または銀(silver)を含む、請求項36に記載の半導体素子の製造方法。
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KR1020110142689A KR101275458B1 (ko) | 2011-12-26 | 2011-12-26 | 반도체 소자 및 그 제조 방법 |
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JP2012241613A Expired - Fee Related JP5610595B2 (ja) | 2011-12-26 | 2012-11-01 | 半導体素子及びその製造方法 |
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JP (1) | JP5610595B2 (ja) |
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DE102013207829A1 (de) * | 2012-12-27 | 2014-07-03 | Ihp Gmbh - Innovations For High Performance Microelectronics / Leibniz-Institut Für Innovative Mikroelektronik | Chip-Antenne, Elektronisches Bauelement und Herstellungsverfahren dafür |
KR102004768B1 (ko) * | 2013-08-30 | 2019-07-29 | 삼성전기주식회사 | 전력 반도체 소자 |
US11101137B1 (en) * | 2020-03-19 | 2021-08-24 | Alpha And Omega Semiconductor International Lp | Method of making reverse conducting insulated gate bipolar transistor |
KR102437047B1 (ko) | 2020-12-11 | 2022-08-26 | 현대모비스 주식회사 | 전력 반도체 소자 및 전력 반도체 칩 |
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JP5564161B2 (ja) * | 2007-05-08 | 2014-07-30 | ローム株式会社 | 半導体装置およびその製造方法 |
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- 2011-12-26 KR KR1020110142689A patent/KR101275458B1/ko active IP Right Grant
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- 2012-11-01 JP JP2012241613A patent/JP5610595B2/ja not_active Expired - Fee Related
- 2012-11-05 CN CN201210436494.9A patent/CN103178103B/zh not_active Expired - Fee Related
- 2012-11-15 US US13/678,336 patent/US20130161688A1/en not_active Abandoned
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JP5610595B2 (ja) | 2014-10-22 |
CN103178103A (zh) | 2013-06-26 |
CN103178103B (zh) | 2016-06-22 |
US20130161688A1 (en) | 2013-06-27 |
KR101275458B1 (ko) | 2013-06-17 |
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