JP5612256B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP5612256B2 JP5612256B2 JP2008267592A JP2008267592A JP5612256B2 JP 5612256 B2 JP5612256 B2 JP 5612256B2 JP 2008267592 A JP2008267592 A JP 2008267592A JP 2008267592 A JP2008267592 A JP 2008267592A JP 5612256 B2 JP5612256 B2 JP 5612256B2
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- 239000004065 semiconductor Substances 0.000 title claims description 153
- 239000010410 layer Substances 0.000 description 269
- 230000004888 barrier function Effects 0.000 description 28
- 230000015556 catabolic process Effects 0.000 description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- 239000012535 impurity Substances 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 7
- 239000010703 silicon Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000005684 electric field Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002344 surface layer Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/7801—DMOS transistors, i.e. MISFETs with a channel accommodating body or base region adjoining a drain drift region
- H01L29/7802—Vertical DMOS transistors, i.e. VDMOS transistors
- H01L29/7813—Vertical DMOS transistors, i.e. VDMOS transistors with trench gate electrode, e.g. UMOS transistors
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- H01L29/407—Recessed field plates, e.g. trench field plates, buried field plates
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- H01L29/41725—Source or drain electrodes for field effect devices
- H01L29/41766—Source or drain electrodes for field effect devices with at least part of the source or drain electrode having contact below the semiconductor surface, e.g. the source or drain electrode formed at least partially in a groove or with inclusions of conductor inside the semiconductor
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Electrodes Of Semiconductors (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
Description
図1は本発明の第1の実施形態に係る半導体装置の要部断面を示す模式図である。
図3は本発明の第2の実施形態に係る半導体装置の要部断面を示す模式図である。
図7は本発明の第3の実施形態に係る半導体装置の要部断面を示す模式図である。
図9は本発明の第4の実施形態に係る半導体装置の要部断面を示す模式図である。
図11は本発明の第5の実施形態に係る半導体装置の要部断面を示す模式図である。
(付記1)
第1導電型の第1の半導体層と、
前記第1の半導体層の主面上に設けられた第1導電型の第2の半導体層と、
前記第2の半導体層に隣接して前記第1の半導体層の前記主面上に設けられ、前記第1の半導体層の前記主面に対して略平行な横方向に前記第2の半導体層と共に周期的配列構造を形成する第2導電型の第3の半導体層と、
前記第3の半導体層の上に設けられた第2導電型の第4の半導体層と、
前記第4の半導体層の表面に選択的に設けられた第1導電型の第5の半導体層と、
前記第1の半導体層に電気的に接続された第1の主電極と、
前記第2の半導体層と前記第3の半導体層との接合部上、前記第4の半導体層に接する部分、前記第5の半導体層に接する部分および前記第2の半導体層に接する部分に設けられたゲート絶縁膜と、
前記ゲート絶縁膜を介して、前記第4の半導体層、前記第5の半導体層および前記第2の半導体層に対向して設けられた制御電極と、
前記第4の半導体層、前記第5の半導体層および前記第2の半導体層と電気的に接続された第2の主電極と、
を備え、
前記第2の主電極は、前記制御電極間に位置する前記第2の半導体層の表面と接してショットキー接合を形成していることを特徴とする半導体装置。
(付記2)
前記ゲート絶縁膜及び前記制御電極は、前記第4の半導体層、前記第5の半導体層および前記第2の半導体層に接して形成されたトレンチ内に設けられていることを特徴とする付記1に記載の半導体装置。
(付記3)
前記第2の半導体層の表層部に第2のトレンチが設けられたことを特徴とする付記2に記載の半導体装置。
(付記4)
前記第2のトレンチ内は、前記ゲート絶縁膜および前記制御電極と同じ材料で埋め込まれていることを特徴とする付記3に記載の半導体装置。
(付記5)
前記第2のトレンチの底部に第2導電型の第6の半導体層が設けられ、
前記第2のトレンチ内は前記第2の主電極で埋め込まれていることを特徴とする付記3に記載の半導体装置。
(付記6)
前記ゲート絶縁膜及び前記制御電極は、前記第4の半導体層、前記第5の半導体層および前記第2の半導体層に接して形成されたトレンチ内に設けられ、
前記第2の半導体層の表面に、第2導電型の第6の半導体層が選択的に設けられたことを特徴とする付記1に記載の半導体装置。
(付記7)
前記トレンチと前記第6の半導体層とは、互いに直交するストライプ状に形成されていることを特徴とする付記6に記載の半導体装置。
(付記8)
前記ゲート絶縁膜及び前記制御電極は、前記第4の半導体層、前記第5の半導体層および前記第2の半導体層に接して形成されたトレンチ内に設けられ、
前記第4の半導体層の接合深さが、前記トレンチの底部より深いことを特徴とする付記1に記載の半導体装置。
(付記9)
前記ゲート絶縁膜と前記制御電極は、プレナーゲート構造を有することを特徴とする付記1に記載の半導体装置。
(付記10)
前記第3の半導体層の横方向周期は、前記第4の半導体層の横方向周期の1/2倍であり、
前記第4の半導体層と接していない前記第3の半導体層は、前記第2の主電極と接していることを特徴とする付記1に記載の半導体装置。
(付記11)
前記第2の主電極と接している前記第3の半導体層表面には、第2導電型の第7の半導体層が設けられていることを特徴とする付記10に記載の半導体装置。
Claims (4)
- 第1導電型の第2の半導体層と、
前記第2の半導体層の一方の面側であり、前記一方の面に対して平行な第1の方向において、前記第2の半導体層と交互に並ぶ第2導電型の第3の半導体層と、
前記第3の半導体層の上に設けられた第2導電型の第4の半導体層と、
前記第4の半導体層の表面に選択的に設けられた第1導電型の第5の半導体層と、
前記第2の半導体層の他方の面に電気的に接続された第1の主電極と、
前記第2の半導体層内に位置し、前記第3の半導体層、前記第4の半導体層、及び前記第5の半導体層に接する複数のゲート絶縁膜と、
前記ゲート絶縁膜内に設けられ、前記第2の半導体層と前記第3の半導体層との接合部上に位置し、前記第1の方向に対して直交する第2の方向に、前記第2の半導体層及び前記第3の半導体層と平行に延びている制御電極と、
前記第4の半導体層及び前記第5の半導体層と電気的に接続され、且つ隣接する前記ゲート絶縁膜間における前記第2の半導体層とショットキー接合を形成する第2の主電極と、
を有する半導体装置。 - 前記制御電極は、前記第2の主電極と前記第2の半導体層との間、及び前記第2の主電極と前記第3の半導体層との間に設けられた請求項1記載の半導体装置。
- 前記ゲート絶縁膜及び前記制御電極は、前記第4の半導体層及び前記第5の半導体層に接し、且つ前記第2の半導体層内に位置するトレンチ内部に設けられている請求項1または2に記載の半導体装置。
- 隣接する前記ゲート絶縁膜間の幅は、前記第2の半導体層の前記一方の面に対して垂直な方向において前記第2の半導体層と前記ゲート絶縁膜が接する幅よりも狭い請求項1乃至3のいずれか1つに記載の半導体装置。
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JP2008267592A JP5612256B2 (ja) | 2008-10-16 | 2008-10-16 | 半導体装置 |
US12/537,219 US7755138B2 (en) | 2008-10-16 | 2009-08-06 | Semiconductor device |
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JP2008267592A JP5612256B2 (ja) | 2008-10-16 | 2008-10-16 | 半導体装置 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US10510879B2 (en) | 2018-03-22 | 2019-12-17 | Kabushiki Kaisha Toshiba | Semiconductor device |
Families Citing this family (33)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2006085267A2 (en) * | 2005-02-08 | 2006-08-17 | Nxp B.V. | Semiconductor device with trench field plate |
US20120273916A1 (en) * | 2011-04-27 | 2012-11-01 | Yedinak Joseph A | Superjunction Structures for Power Devices and Methods of Manufacture |
JP5304416B2 (ja) * | 2009-04-28 | 2013-10-02 | 富士電機株式会社 | 電力変換回路 |
US20110084332A1 (en) * | 2009-10-08 | 2011-04-14 | Vishay General Semiconductor, Llc. | Trench termination structure |
JP5449094B2 (ja) | 2010-09-07 | 2014-03-19 | 株式会社東芝 | 半導体装置 |
KR101201382B1 (ko) * | 2010-12-02 | 2012-11-14 | (주) 트리노테크놀로지 | 감소된 셀 피치를 가지는 전력 반도체 소자 |
JP5995435B2 (ja) | 2011-08-02 | 2016-09-21 | ローム株式会社 | 半導体装置およびその製造方法 |
JP5720805B2 (ja) * | 2011-11-28 | 2015-05-20 | 富士電機株式会社 | 絶縁ゲート型半導体装置およびその製造方法 |
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