JP7102919B2 - 半導体装置の製造方法 - Google Patents
半導体装置の製造方法 Download PDFInfo
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- JP7102919B2 JP7102919B2 JP2018091632A JP2018091632A JP7102919B2 JP 7102919 B2 JP7102919 B2 JP 7102919B2 JP 2018091632 A JP2018091632 A JP 2018091632A JP 2018091632 A JP2018091632 A JP 2018091632A JP 7102919 B2 JP7102919 B2 JP 7102919B2
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- trench
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- insulating film
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/64—Double-diffused metal-oxide semiconductor [DMOS] FETs
- H10D30/66—Vertical DMOS [VDMOS] FETs
- H10D30/668—Vertical DMOS [VDMOS] FETs having trench gate electrodes, e.g. UMOS transistors
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/028—Manufacture or treatment of FETs having insulated gates [IGFET] of double-diffused metal oxide semiconductor [DMOS] FETs
- H10D30/0291—Manufacture or treatment of FETs having insulated gates [IGFET] of double-diffused metal oxide semiconductor [DMOS] FETs of vertical DMOS [VDMOS] FETs
- H10D30/0297—Manufacture or treatment of FETs having insulated gates [IGFET] of double-diffused metal oxide semiconductor [DMOS] FETs of vertical DMOS [VDMOS] FETs using recessing of the gate electrodes, e.g. to form trench gate electrodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/13—Semiconductor regions connected to electrodes carrying current to be rectified, amplified or switched, e.g. source or drain regions
- H10D62/149—Source or drain regions of field-effect devices
- H10D62/151—Source or drain regions of field-effect devices of IGFETs
- H10D62/152—Source regions of DMOS transistors
- H10D62/154—Dispositions
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/13—Semiconductor regions connected to electrodes carrying current to be rectified, amplified or switched, e.g. source or drain regions
- H10D62/149—Source or drain regions of field-effect devices
- H10D62/151—Source or drain regions of field-effect devices of IGFETs
- H10D62/152—Source regions of DMOS transistors
- H10D62/155—Shapes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D62/00—Semiconductor bodies, or regions thereof, of devices having potential barriers
- H10D62/10—Shapes, relative sizes or dispositions of the regions of the semiconductor bodies; Shapes of the semiconductor bodies
- H10D62/17—Semiconductor regions connected to electrodes not carrying current to be rectified, amplified or switched, e.g. channel regions
- H10D62/393—Body regions of DMOS transistors or IGBTs
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D64/00—Electrodes of devices having potential barriers
- H10D64/20—Electrodes characterised by their shapes, relative sizes or dispositions
- H10D64/23—Electrodes carrying the current to be rectified, amplified, oscillated or switched, e.g. sources, drains, anodes or cathodes
- H10D64/251—Source or drain electrodes for field-effect devices
- H10D64/252—Source or drain electrodes for field-effect devices for vertical or pseudo-vertical devices
- H10D64/2527—Source or drain electrodes for field-effect devices for vertical or pseudo-vertical devices for vertical devices wherein the source or drain electrodes are recessed in semiconductor bodies
Landscapes
- Electrodes Of Semiconductors (AREA)
Description
12:ドレイン電極
14:トレンチゲート部
14a:ゲート絶縁膜
14b:ゲート電極
14c:キャップ絶縁膜
18:ソース電極
18a:トレンチコンタクト部
20:半導体層
22:ドレイン領域
24:ドリフト領域
26:ボディ領域
27:ボディコンタクト領域
28:ソース領域
Claims (3)
- トレンチゲート部を備える半導体装置の製造方法であって、
半導体層の表面から深部に向けて伸びる第1トレンチを形成する工程と、
前記半導体層の前記表面及び前記第1トレンチの内壁面を被覆するゲート絶縁膜を形成する工程と、
前記ゲート絶縁膜が被膜された前記第1トレンチ内にゲート電極を充填する工程と、
前記第1トレンチ内に充填された前記ゲート電極の上面を被覆するキャップ絶縁膜を形成する工程と、
前記キャップ絶縁膜を残すように、前記半導体層の前記表面を被覆する前記ゲート絶縁膜を除去して前記半導体層の前記表面を露出させる工程と、
露出した前記半導体層の前記表面から前記第1トレンチよりも浅い深さを有する第2トレンチを形成する工程であって、前記第2トレンチが前記第1トレンチの側面に隣接する、第2トレンチを形成する工程と、
前記第2トレンチ内にポリシリコンを充填する工程と、
前記半導体層の前記表面から前記深部に向けて伸びる第3トレンチを形成する工程であって、前記第3トレンチが前記第2トレンチを間に置いて前記トレンチゲート部の側面に対向する、第3トレンチを形成する工程と、
前記ポリシリコンに接する主電極を形成する工程と、を備え、
前記主電極を形成する工程では、前記第3トレンチ内に前記主電極の一部が充填される、半導体装置の製造方法。 - 前記ポリシリコンを充填する工程では、前記ポリシリコンの一部が前記キャップ絶縁膜上にも形成され、
前記主電極を形成する工程では、前記キャップ絶縁膜上において前記ポリシリコンに接するように前記主電極の一部が形成される、請求項1に記載の半導体装置の製造方法。 - 前記ポリシリコンを充填する工程では、前記トレンチゲート部上に位置する前記ポリシリコンに溝が形成され、
前記主電極を形成する工程では、前記ポリシリコンの前記溝内に前記主電極の一部が形成される、請求項2に記載の半導体装置の製造方法。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018091632A JP7102919B2 (ja) | 2018-05-10 | 2018-05-10 | 半導体装置の製造方法 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018091632A JP7102919B2 (ja) | 2018-05-10 | 2018-05-10 | 半導体装置の製造方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2019197835A JP2019197835A (ja) | 2019-11-14 |
| JP7102919B2 true JP7102919B2 (ja) | 2022-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2018091632A Active JP7102919B2 (ja) | 2018-05-10 | 2018-05-10 | 半導体装置の製造方法 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001111042A (ja) | 1999-10-06 | 2001-04-20 | Toyota Central Res & Dev Lab Inc | 絶縁ゲート型半導体装置 |
| JP2003092405A (ja) | 2001-09-19 | 2003-03-28 | Toshiba Corp | 半導体装置及びその製造方法 |
| JP2004134595A (ja) | 2002-10-10 | 2004-04-30 | Shindengen Electric Mfg Co Ltd | 半導体装置およびその製造方法 |
| JP2005259796A (ja) | 2004-03-09 | 2005-09-22 | Nissan Motor Co Ltd | 半導体装置とその製造方法 |
| JP2011134985A (ja) | 2009-12-25 | 2011-07-07 | Fuji Electric Co Ltd | トレンチゲート型半導体装置とその製造方法 |
| JP2013182934A (ja) | 2012-02-29 | 2013-09-12 | Toshiba Corp | 半導体装置およびその製造方法 |
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2018
- 2018-05-10 JP JP2018091632A patent/JP7102919B2/ja active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001111042A (ja) | 1999-10-06 | 2001-04-20 | Toyota Central Res & Dev Lab Inc | 絶縁ゲート型半導体装置 |
| JP2003092405A (ja) | 2001-09-19 | 2003-03-28 | Toshiba Corp | 半導体装置及びその製造方法 |
| JP2004134595A (ja) | 2002-10-10 | 2004-04-30 | Shindengen Electric Mfg Co Ltd | 半導体装置およびその製造方法 |
| JP2005259796A (ja) | 2004-03-09 | 2005-09-22 | Nissan Motor Co Ltd | 半導体装置とその製造方法 |
| JP2011134985A (ja) | 2009-12-25 | 2011-07-07 | Fuji Electric Co Ltd | トレンチゲート型半導体装置とその製造方法 |
| JP2013182934A (ja) | 2012-02-29 | 2013-09-12 | Toshiba Corp | 半導体装置およびその製造方法 |
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| JP2019197835A (ja) | 2019-11-14 |
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