JP2005294533A - 半導体装置 - Google Patents
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 53
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- 230000005684 electric field Effects 0.000 description 7
- 239000012535 impurity Substances 0.000 description 7
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- 239000002131 composite material Substances 0.000 description 2
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- 238000005468 ion implantation Methods 0.000 description 1
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Abstract
【解決手段】埋め込み酸化膜3と、埋め込み酸化膜上に配置された活性層4と、活性層表面近傍に配置されたベース領域5と、ベース領域内に配置された第1主電極領域7と、活性層の表面から埋め込み酸化膜の内部まで若しくは突き抜けて形成された第2主電極領域8と、ベース領域の表面近傍に配置されたゲート絶縁膜12と、ゲート絶縁膜上に配置されたゲート電極11と、第1主電極領域に電気的に接触する第1主電極9と、第2主電極領域に電気的に接触する第2主電極10と、グラウンド電極1と、グラウンド電極上に電気的に接触しかつ、埋め込み酸化膜との間に介在して配置される支持基板21、22とを備え、支持基板側に空乏層を伸ばすことによって、電界集中を緩和し高耐圧及び低オン抵抗化を実現する半導体装置。
【選択図】図1
Description
竹花 康宏他著「TC(Triple Conduction)構造による700V横型MOSFETのドレイン耐圧特性の向上」 電気学会電子デバイス・半導体電力変換合同研究会、EDD−03−48,SPC−03−115,2003年9月、p.21−26
本発明の第1の実施の形態に係る半導体装置のユニットセル部分を示す模式的素子断面構造は、図1に示すように、埋め込み酸化膜3と、埋め込み酸化膜3上に配置された活性層(n-層)4と、活性層4表面近傍に配置されたベース領域5と、ベース領域5内に配置された第1主電極領域7と、活性層4の表面から埋め込み酸化膜3を突き抜けて形成された第2主電極領域8と、ベース領域5に対してゲート絶縁膜12を介して配置されたゲート電極11と、第1主電極領域7に接触する第1主電極9と、第2主電極領域8の内部において第2主電極領域8に接触する第2主電極10と、グラウンド電極1と、p+支持基板21およびp- 層若しくはn-層からなる支持基板22と、支持基板側ドレイン領域13とを備える。
本発明の第2の実施の形態に係る半導体装置のユニットセル部分を示す模式的素子断面構造は、図2に示すように、グラウンド電極1と、グラウンド電極1に接触するp+支持基板21と、p+支持基板21上に配置されたn-層若しくはp-層からなる支持基板22と、支持基板22に接して配置される埋め込み酸化膜3と、埋め込み酸化膜3上に配置され活性層4を構成するnピラー領域14及びpピラー領域15と、pピラー領域15中に配置されるベース領域5と、ベース領域5中に配置されるバックゲート領域6と、同じくベース領域5中に配置されるソース領域7と、活性層4の表面から埋め込み酸化膜3を突き抜けて形成されたドレイン領域8と、バックゲート領域6とソース領域7とに接触するソース電極9と、ドレイン領域8の内部においてドレイン領域8に接触するドレイン電極10と、活性層4の表面から埋め込み酸化膜3内部に至るように、活性層4の表面に対して垂直方向に形成されているゲート電極11と、活性層4の表面から埋め込み酸化膜3に至るように活性層4とゲート電極11との界面に形成されるゲート絶縁膜12と、支持基板側ドレイン領域13と、ソース・ドレイン間において活性層4の表面に配置された絶縁膜18とを備える。
を備える点にある。活性層4と埋め込み酸化膜3との界面に平行な接合面を有するpn接合からなるスーパージャンクション構造を用いてMOSFETのソース・ドレイン間を形成している。
本発明の第3の実施の形態に係る半導体装置のユニットセル部分を示す模式的素子断面構造は、図3に示すように、グラウンド電極1と、グラウンド電極1に接触するp+支持基板21と、p+支持基板21上に配置されたn-層若しくはp-層からなる支持基板22と、支持基板22に接して配置される埋め込み酸化膜3と、埋め込み酸化膜3上に配置され活性層4を構成するpピラー領域16,nピラー領域14及びpピラー領域15と、pピラー領域15中に配置されるベース領域5と、ベース領域5中に配置されるバックゲート領域6と、同じくベース領域5中に配置されるソース領域7と、活性層4の表面から埋め込み酸化膜3を突き抜けて形成されたドレイン領域8と、バックゲート領域6とソース領域7とに接触し、かつ活性層4の表面から埋め込み酸化膜3近傍のpピラー領域16の内部に至るように、活性層4の表面に対して垂直方向に伸延する部分を更に有するソース電極9と、ソース電極9とpピラー領域16内部において接触するpピラーバックゲート用領域17と、ドレイン領域8の内部においてドレイン領域8に接触するドレイン電極10と、活性層4の表面から埋め込み酸化膜3近傍のpピラー領域16の内部に至るように、活性層4の表面に対して垂直方向に形成されているゲート電極11と、活性層4の表面から埋め込み酸化膜3近傍のpピラー領域16の内部に至るように活性層4とゲート電極11との界面に形成されるゲート絶縁膜12と、支持基板側ドレイン領域13と、ソース・ドレイン間において活性層4の表面に配置された絶縁膜18と、を備える。
本発明の第4の実施の形態に係る半導体装置のユニットセル部分を示す模式的素子断面構造は、図4に示すように、グラウンド電極1と、グラウンド電極1に接触するp+支持基板21と、p+支持基板21上に配置されたn-層若しくはp-層からなる支持基板22と、支持基板22に接して配置される埋め込み酸化膜3と、埋め込み酸化膜3上に配置され活性層4を構成するnピラー領域14及びpピラー領域15と、pピラー領域15中に配置されるベース領域5と、ベース領域5中に配置されるバックゲート領域6と、同じくベース領域5中に配置されるソース領域7と、活性層4の表面から埋め込み酸化膜3表面若しくは内部に至るように活性層4の表面に対して垂直方向に形成されたドレイン領域8と、バックゲート領域6とソース領域7とに接触するソース電極9と、ドレイン領域8の内部においてドレイン領域8に接触し、活性層4の表面から埋め込み酸化膜3内部に至るように、活性層4の表面に対して垂直方向に形成されているドレイン電極10と、活性層4の表面から埋め込み酸化膜3内部に至るように、活性層4の表面に対して垂直方向に形成されているゲート電極11と、活性層4の表面から埋め込み酸化膜3に至るように活性層4とゲート電極11との界面に形成されるゲート絶縁膜12と、ソース・ドレイン間において活性層4の表面に配置された絶縁膜18とを備える。
上記のように、本発明は第1乃至第4の実施の形態によって記載したが、この開示の一部をなす論述及び図面はこの発明を限定するものであると理解すべきではない。この開示から当業者には様々な代替実施の形態、実施例及び運用技術が明らかとなろう。
2,21,22…支持基板
3…埋め込み酸化膜(BOX酸化膜)
4…活性層
5…ベース電極
6…バックゲート領域
7…ソース領域
8…ドレイン領域
9…ソース電極
10…ドレイン電極
11…ゲート電極
12…ゲート絶縁膜
13…支持基板側ドレイン領域
14…nピラー領域
15,16…pピラー領域
17…pピラーバックゲート用領域
18…絶縁膜
24…ゲート湾曲部
Claims (5)
- 半導体基板と、
前記半導体基板上に配置された埋め込み絶縁膜と、
前記埋め込み絶縁膜上に配置された活性層と、
前記活性層表面近傍に配置されたベース領域と、
前記ベース領域内に配置された第1主電極領域と、
前記活性層の表面から前記埋め込み絶縁膜の表面まで若しくは突き抜けて形成された第2主電極領域と、
前記ベース領域の表面近傍に配置されたゲート絶縁膜と、
前記ゲート絶縁膜上に配置されたゲート電極と、
前記第1主電極領域に電気的に接触する第1主電極と、
前記第2主電極領域に電気的に接触する第2主電極と、
前記半導体基板の前記埋め込み絶縁膜が配置される面と反対側の面で前記半導体基板に電気的に接触するグラウンド電極
とを備えることを特徴とする半導体装置。 - 前記第2主電極は、前記第2主電極領域の表面から前記埋め込み絶縁膜の内部まで若しくは突き抜けて形成されたことを特徴とする請求項1に記載の半導体装置。
- 前記活性層は、双方が接触する界面でpn接合を形成する第1及び第2ピラー領域を備え、前記第1、第2ピラー領域間のpn接合は、前記活性層が前記埋め込み絶縁膜と接触する面に略平行な接合面を有することを特徴とする請求項1又は2に記載の半導体装置。
- 前記ゲート電極は前記活性層の表面から少なくとも前記埋め込み絶縁膜近傍に至るように、前記活性層の表面に対して垂直方向に形成されていることを特徴とする請求項1乃至請求項3の内、いずれか1項に記載の半導体装置。
- 前記活性層は、各々が接触する界面でpn接合を形成する第1、第2及び第3ピラー領域を備え、前記第1、第2、第3ピラー領域間のpn接合は、前記活性層が前記埋め込み絶縁膜と接触する面に略平行な接合面を有すると共に、前記第1主電極は、前記活性層の表面から前記第1、第2及び第3ピラー領域の内の前記埋め込み絶縁膜側に形成されたピラー領域に至るように、前記活性層の表面に対して垂直方向に伸延する部分を更に有することを特徴とする請求項1,請求項2又は請求項4の内、いずれか1項に記載の半導体装置。
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JP2007158139A (ja) * | 2005-12-07 | 2007-06-21 | Oki Electric Ind Co Ltd | 半導体装置およびその製造方法 |
JP2015141925A (ja) * | 2014-01-27 | 2015-08-03 | ルネサスエレクトロニクス株式会社 | 半導体装置およびその製造方法 |
JP2017034154A (ja) * | 2015-08-04 | 2017-02-09 | 株式会社東芝 | 半導体装置 |
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JP2006005275A (ja) * | 2004-06-21 | 2006-01-05 | Toshiba Corp | 電力用半導体素子 |
US8080851B2 (en) * | 2008-08-29 | 2011-12-20 | International Business Machines Corporation | Deep trench electrostatic discharge (ESD) protect diode for silicon-on-insulator (SOI) devices |
DE102009018054B4 (de) * | 2009-04-21 | 2018-11-29 | Infineon Technologies Austria Ag | Lateraler HEMT und Verfahren zur Herstellung eines lateralen HEMT |
KR101154750B1 (ko) * | 2009-09-10 | 2012-06-08 | 엘지이노텍 주식회사 | 발광소자 및 그 제조방법 |
CN103222057A (zh) * | 2011-11-17 | 2013-07-24 | 富士电机株式会社 | 半导体器件以及半导体器件的制造方法 |
JP6184057B2 (ja) * | 2012-04-18 | 2017-08-23 | ルネサスエレクトロニクス株式会社 | 半導体装置 |
CN103560145B (zh) * | 2013-11-16 | 2016-08-17 | 重庆大学 | 一种具有界面栅的soi功率器件结构 |
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US20160035899A1 (en) * | 2014-07-30 | 2016-02-04 | Qualcomm Incorporated | Biasing a silicon-on-insulator (soi) substrate to enhance a depletion region |
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US6121661A (en) * | 1996-12-11 | 2000-09-19 | International Business Machines Corporation | Silicon-on-insulator structure for electrostatic discharge protection and improved heat dissipation |
DE19801095B4 (de) * | 1998-01-14 | 2007-12-13 | Infineon Technologies Ag | Leistungs-MOSFET |
JP2000332247A (ja) | 1999-03-15 | 2000-11-30 | Toshiba Corp | 半導体装置 |
FR2826183A1 (fr) * | 2001-06-15 | 2002-12-20 | St Microelectronics Sa | Transistor mos de puissance lateral |
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JP2007158139A (ja) * | 2005-12-07 | 2007-06-21 | Oki Electric Ind Co Ltd | 半導体装置およびその製造方法 |
JP2015141925A (ja) * | 2014-01-27 | 2015-08-03 | ルネサスエレクトロニクス株式会社 | 半導体装置およびその製造方法 |
JP2017034154A (ja) * | 2015-08-04 | 2017-02-09 | 株式会社東芝 | 半導体装置 |
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US20050253187A1 (en) | 2005-11-17 |
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