JP2008010626A - 半導体装置及びその製造方法 - Google Patents
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- H10D30/028—Manufacture or treatment of FETs having insulated gates [IGFET] of double-diffused metal oxide semiconductor [DMOS] FETs
- H10D30/0281—Manufacture or treatment of FETs having insulated gates [IGFET] of double-diffused metal oxide semiconductor [DMOS] FETs of lateral DMOS [LDMOS] FETs
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- H10D62/17—Semiconductor regions connected to electrodes not carrying current to be rectified, amplified or switched, e.g. channel regions
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- 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
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- H10D62/156—Drain regions of DMOS transistors
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- H10D62/17—Semiconductor regions connected to electrodes not carrying current to be rectified, amplified or switched, e.g. channel regions
- H10D62/351—Substrate regions of field-effect devices
- H10D62/357—Substrate regions of field-effect devices of FETs
- H10D62/364—Substrate regions of field-effect devices of FETs of IGFETs
- H10D62/371—Inactive supplementary semiconductor regions, e.g. for preventing punch-through, improving capacity effect or leakage current
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- H10D64/411—Gate electrodes for field-effect devices for FETs
- H10D64/511—Gate electrodes for field-effect devices for FETs for IGFETs
- H10D64/514—Gate electrodes for field-effect devices for FETs for IGFETs characterised by the insulating layers
- H10D64/516—Gate electrodes for field-effect devices for FETs for IGFETs characterised by the insulating layers the thicknesses being non-uniform
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- H10D64/27—Electrodes not carrying the current to be rectified, amplified, oscillated or switched, e.g. gates
- H10D64/311—Gate electrodes for field-effect devices
- H10D64/411—Gate electrodes for field-effect devices for FETs
- H10D64/511—Gate electrodes for field-effect devices for FETs for IGFETs
- H10D64/517—Gate electrodes for field-effect devices for FETs for IGFETs characterised by the conducting layers
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- H10D64/27—Electrodes not carrying the current to be rectified, amplified, oscillated or switched, e.g. gates
- H10D64/311—Gate electrodes for field-effect devices
- H10D64/411—Gate electrodes for field-effect devices for FETs
- H10D64/511—Gate electrodes for field-effect devices for FETs for IGFETs
- H10D64/517—Gate electrodes for field-effect devices for FETs for IGFETs characterised by the conducting layers
- H10D64/519—Gate electrodes for field-effect devices for FETs for IGFETs characterised by the conducting layers characterised by their top-view geometrical layouts
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- H10D64/00—Electrodes of devices having potential barriers
- H10D64/60—Electrodes characterised by their materials
- H10D64/66—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes
- H10D64/661—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes the conductor comprising a layer of silicon contacting the insulator, e.g. polysilicon having vertical doping variation
- H10D64/662—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes the conductor comprising a layer of silicon contacting the insulator, e.g. polysilicon having vertical doping variation the conductor further comprising additional layers, e.g. multiple silicon layers having different crystal structures
- H10D64/663—Electrodes having a conductor capacitively coupled to a semiconductor by an insulator, e.g. MIS electrodes the conductor comprising a layer of silicon contacting the insulator, e.g. polysilicon having vertical doping variation the conductor further comprising additional layers, e.g. multiple silicon layers having different crystal structures the additional layers comprising a silicide layer contacting the layer of silicon, e.g. polycide gates
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Abstract
【解決手段】本発明の半導体装置、例えば、オフセットゲート構造を有するPチャネル型MOSトランジスタ1では、N型のエピタキシャル層3には、ソース領域とドレイン領域との間にLOCOS酸化膜20、21が形成されている。ゲート電極14、15は、LOCOS酸化膜20、21上に位置配置されるように形成されている。そして、ドレイン領域としてのP型の拡散層6、7及びソース領域としてのP型の拡散層12、13が、ゲート電極14、15に対して位置精度よく形成されている。この構造により、MOSトランジスタ1のデバイスサイズを縮小することができる。
【選択図】図1
Description
エピタキシャル層のLOCOS酸化膜を形成する領域において、傾斜の緩いバーズビーク部を形成する領域に第1のシリコン酸化膜を形成する。そして、第1のシリコン酸化膜上を含め、エピタキシャル層上に第2のシリコン酸化膜を形成する。その後、LOCOS酸化膜が形成される領域に開口部を有するシリコン窒化膜を形成した後、LOCOS法によりLOCOS酸化膜を形成する。そして、エピタキシャル層上にフォトレジストを選択マスクとして形成し、イオン注入法により、ドレイン領域を構成するP型の拡散層を形成する。このとき、LOCOS酸化膜の傾斜の緩いバーズビーク部下方には、不純物が注入され、P型の拡散層が形成される。その後、バックゲート領域、ソース領域、ゲート酸化膜及びゲート電極を形成し、Nチャネル型MOSトランジスタを形成する(例えば、特許文献1参照。)。
2 P型の単結晶シリコン基板
3 N型のエピタキシャル層
5 P型の拡散層
6 P型の拡散層
7 P型の拡散層
14 ゲート電極
15 ゲート電極
17 ポリシリコン膜
18 タングステンシリコン膜
20 LOCOS酸化膜
21 LOCOS酸化膜
Claims (6)
- 半導体層と、前記半導体層に形成されるドレイン領域、ソース領域及びバックゲート領域と、前記半導体層上面に形成されるゲート酸化膜と、前記ゲート酸化膜上に形成されるゲート電極とを有する半導体装置において、
前記ゲート電極の形成領域の下方において、前記ドレイン領域と前記ソース領域との離間距離は等しいことを特徴とする半導体装置。 - 前記ゲート電極は、ポリシリコン膜とタングステンシリコン膜とから形成され、前記タングステンシリコン膜の膜厚は前記ポリシリコン膜の膜厚よりも厚いことを特徴とする請求項1に記載の半導体装置。
- 前記熱酸化膜は、LOCOS法により形成されたLOCOS酸化膜であることを特徴とする請求項1に記載の半導体装置。
- 半導体層にドレイン領域を構成する第1の拡散層を形成し、前記半導体層に熱酸化膜を形成する工程と、
前記半導体層上にゲート酸化膜を形成し、前記熱酸化膜上に少なくとも一部が配置されるようにゲート電極を形成した後、前記第1の拡散層に重畳するようにバックゲート領域を形成する工程と、
前記ゲート電極を用いたセルファラインにより、前記第1の拡散層に重畳するように前記ドレイン領域を構成する第2の拡散層を形成し、前記バックゲート領域に重畳するようにソース領域を形成する工程とを有することを特徴とする半導体装置の製造方法。 - 前記ソース領域を形成する工程では、前記第2の拡散層と対向する側面側は、前記ゲート電極を用いたセルファラインにより形成されることを特徴とする請求項4に記載の半導体装置の製造方法。
- 前記ゲート電極を形成する工程では、ポリシリコン膜上にタングステンシリコン膜を堆積させ、前記タングステンシリコン膜の膜厚を前記ポリシリコン膜の膜厚よりも厚くすることを特徴とする請求項4に記載の半導体装置の製造方法。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006179388A JP2008010626A (ja) | 2006-06-29 | 2006-06-29 | 半導体装置及びその製造方法 |
| US11/770,306 US7732880B2 (en) | 2006-06-29 | 2007-06-28 | Semiconductor device and method of manufacturing the same |
| CN200710126349XA CN101097961B (zh) | 2006-06-29 | 2007-06-29 | 半导体装置及其制造方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006179388A JP2008010626A (ja) | 2006-06-29 | 2006-06-29 | 半導体装置及びその製造方法 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2008010626A true JP2008010626A (ja) | 2008-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006179388A Ceased JP2008010626A (ja) | 2006-06-29 | 2006-06-29 | 半導体装置及びその製造方法 |
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| Country | Link |
|---|---|
| US (1) | US7732880B2 (ja) |
| JP (1) | JP2008010626A (ja) |
| CN (1) | CN101097961B (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012104678A (ja) * | 2010-11-11 | 2012-05-31 | Fujitsu Semiconductor Ltd | 半導体装置 |
| JP2012156205A (ja) * | 2011-01-24 | 2012-08-16 | Asahi Kasei Electronics Co Ltd | 半導体装置、半導体装置の製造方法 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6077291B2 (ja) * | 2012-12-10 | 2017-02-08 | エスアイアイ・セミコンダクタ株式会社 | 不揮発性メモリ回路 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000260962A (ja) * | 1999-03-10 | 2000-09-22 | Hitachi Ltd | 半導体集積回路装置 |
| JP2003168796A (ja) * | 2001-11-30 | 2003-06-13 | Sanyo Electric Co Ltd | 半導体装置の製造方法 |
| JP2003309257A (ja) * | 2002-04-17 | 2003-10-31 | Sanyo Electric Co Ltd | Mos半導体装置の製造方法 |
| JP2003309258A (ja) * | 2002-04-17 | 2003-10-31 | Sanyo Electric Co Ltd | Mos半導体装置およびその製造方法 |
| JP2006128640A (ja) * | 2004-09-30 | 2006-05-18 | Sanyo Electric Co Ltd | 半導体装置及びその製造方法 |
| JP2007027641A (ja) * | 2005-07-21 | 2007-02-01 | Toshiba Corp | 半導体装置及びその製造方法 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003101017A (ja) * | 2001-09-27 | 2003-04-04 | Mitsubishi Electric Corp | 半導体装置 |
| JP2003324159A (ja) | 2002-04-26 | 2003-11-14 | Ricoh Co Ltd | 半導体装置 |
| JP4785113B2 (ja) * | 2005-02-24 | 2011-10-05 | オンセミコンダクター・トレーディング・リミテッド | 半導体装置 |
-
2006
- 2006-06-29 JP JP2006179388A patent/JP2008010626A/ja not_active Ceased
-
2007
- 2007-06-28 US US11/770,306 patent/US7732880B2/en active Active
- 2007-06-29 CN CN200710126349XA patent/CN101097961B/zh not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000260962A (ja) * | 1999-03-10 | 2000-09-22 | Hitachi Ltd | 半導体集積回路装置 |
| JP2003168796A (ja) * | 2001-11-30 | 2003-06-13 | Sanyo Electric Co Ltd | 半導体装置の製造方法 |
| JP2003309257A (ja) * | 2002-04-17 | 2003-10-31 | Sanyo Electric Co Ltd | Mos半導体装置の製造方法 |
| JP2003309258A (ja) * | 2002-04-17 | 2003-10-31 | Sanyo Electric Co Ltd | Mos半導体装置およびその製造方法 |
| JP2006128640A (ja) * | 2004-09-30 | 2006-05-18 | Sanyo Electric Co Ltd | 半導体装置及びその製造方法 |
| JP2007027641A (ja) * | 2005-07-21 | 2007-02-01 | Toshiba Corp | 半導体装置及びその製造方法 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012104678A (ja) * | 2010-11-11 | 2012-05-31 | Fujitsu Semiconductor Ltd | 半導体装置 |
| JP2012156205A (ja) * | 2011-01-24 | 2012-08-16 | Asahi Kasei Electronics Co Ltd | 半導体装置、半導体装置の製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| US7732880B2 (en) | 2010-06-08 |
| CN101097961B (zh) | 2011-11-09 |
| CN101097961A (zh) | 2008-01-02 |
| US20080001238A1 (en) | 2008-01-03 |
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