JP5350815B2 - 半導体装置 - Google Patents
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- JP5350815B2 JP5350815B2 JP2009011768A JP2009011768A JP5350815B2 JP 5350815 B2 JP5350815 B2 JP 5350815B2 JP 2009011768 A JP2009011768 A JP 2009011768A JP 2009011768 A JP2009011768 A JP 2009011768A JP 5350815 B2 JP5350815 B2 JP 5350815B2
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- H10D30/0223—Manufacture or treatment of FETs having insulated gates [IGFET] having source and drain regions or source and drain extensions self-aligned to sides of the gate
- H10D30/0227—Manufacture or treatment of FETs having insulated gates [IGFET] having source and drain regions or source and drain extensions self-aligned to sides of the gate having both lightly-doped source and drain extensions and source and drain regions self-aligned to the sides of the gate, e.g. lightly-doped drain [LDD] MOSFET or double-diffused drain [DDD] MOSFET
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- H10D62/235—Channel regions of field-effect devices of FETs of IGFETs
- H10D62/314—Channel regions of field-effect devices of FETs of IGFETs having vertical doping variations
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- H10D84/0123—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs
- H10D84/0126—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs the components including insulated gates, e.g. IGFETs
- H10D84/0165—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs the components including insulated gates, e.g. IGFETs the components including complementary IGFETs, e.g. CMOS devices
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- H10D84/02—Manufacture or treatment characterised by using material-based technologies
- H10D84/03—Manufacture or treatment characterised by using material-based technologies using Group IV technology, e.g. silicon technology or silicon-carbide [SiC] technology
- H10D84/038—Manufacture or treatment characterised by using material-based technologies using Group IV technology, e.g. silicon technology or silicon-carbide [SiC] technology using silicon technology, e.g. SiGe
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- H10P30/00—Ion implantation into wafers, substrates or parts of devices
- H10P30/20—Ion implantation into wafers, substrates or parts of devices into semiconductor materials, e.g. for doping
- H10P30/21—Ion implantation into wafers, substrates or parts of devices into semiconductor materials, e.g. for doping of electrically active species
- H10P30/212—Through-implantation
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- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P30/00—Ion implantation into wafers, substrates or parts of devices
- H10P30/20—Ion implantation into wafers, substrates or parts of devices into semiconductor materials, e.g. for doping
- H10P30/225—Ion implantation into wafers, substrates or parts of devices into semiconductor materials, e.g. for doping of a molecular ion, e.g. decaborane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10S438/00—Semiconductor device manufacturing: process
- Y10S438/931—Silicon carbide semiconductor
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Description
(半導体装置の構成)
図1は、本発明の第1の実施の形態に係る半導体装置1aの断面図である。また、図2は、半導体装置1aのp型トランジスタ領域10のチャネル領域18周辺の部分断面図である。
図3A(a)〜(d)、図3B(e)、(f)は、本発明の第1の実施の形態に係る半導体装置の製造工程を示す断面図である。
本発明の第1の実施の形態によれば、不純物拡散抑制層12を形成することにより、ソース・ドレイン領域17のエクステンション領域17eに含まれるp型不純物の下層への拡散を抑制し、エクステンション領域17eの不純物濃度プロファイルを急峻に保つことができる。
本発明の第2の実施の形態は、不純物供給層をイオン注入法により形成する点において第1の実施の形態と異なる。なお、第1の実施の形態と同様の点については、説明を省略または簡略化する。
図4(a)〜(c)は、本発明の第2の実施の形態に係る半導体装置の製造工程を示す断面図である。
本発明の第2の実施の形態によれば、第1の実施の形態と異なる方法により不純物供給層を形成し、第1の実施の形態と同様の効果を得ることができる。
本発明の第3の実施の形態は、結晶層がSiGe結晶からなる点において第1の実施の形態と異なる。なお、第1の実施の形態と同様の点については、説明を省略または簡略化する。
図5は、本発明の第3の実施の形態に係る半導体装置1bの断面図である。
図6(a)〜(c)は、本発明の第3の実施の形態に係る半導体装置の製造工程を示す断面図である。
本発明の第3の実施の形態によれば、SiGe結晶からなる結晶層33を用いることにより、Si結晶からなる結晶層を用いた場合よりも閾値電圧を低く設定することができる。
本発明の第4の実施の形態は、半導体装置がp型トランジスタに加えてn型トランジスタを有する点において第1の実施の形態と異なる。なお、p型半導体領域10の構成等、第1の実施の形態と同様の点については説明を省略または簡略化する。
図7は、本発明の第4の実施の形態に係る半導体装置1cの断面図である。また、図8(a)、(b)は、それぞれp型およびn型トランジスタ領域10、20におけるチャネル領域周辺の部分断面図である。
図9A(a)〜(d)、図9B(e)、(f)は、本発明の第4の実施の形態に係る半導体装置1cの製造工程を示す断面図である。
本発明の第4の実施の形態によれば、不純物拡散抑制層12を形成することにより、ソース・ドレイン領域17のエクステンション領域17eに含まれるp型不純物の下層への拡散を抑制し、エクステンション領域17eの不純物濃度プロファイルを急峻に保つことができる。
本発明は、上記各実施の形態に限定されず、発明の主旨を逸脱しない範囲内において種々変形実施が可能である。
Claims (5)
- p型トランジスタ領域およびn型トランジスタ領域を有する半導体基板と、
前記p型トランジスタ領域の前記半導体基板上に形成された第1の結晶層と、
前記第1の結晶層上に第1のゲート絶縁膜を介して形成された第1のゲート電極と、
前記半導体基板と前記第1の結晶層との間に形成された、前記第1のゲート電極の下方の領域において第1の不純物を含むSiC結晶からなる第1の不純物拡散抑制層と、
前記p型トランジスタ領域の前記半導体基板、前記第1の不純物拡散抑制層、および前記第1の結晶層内の、前記第1のゲート電極の両側に形成され、前記第1の結晶層内にエクステンション領域を有する、p導電型を有する第2の不純物を含むp型ソース・ドレイン領域と、
前記p型ソース・ドレイン領域の間に形成されたn型チャネル領域と、
前記n型トランジスタ領域の前記半導体基板上に形成された第2の結晶層と、
前記第2の結晶層上に第2のゲート絶縁膜を介して形成された第2のゲート電極と、
前記半導体基板と前記第2の結晶層との間に形成された、前記第2のゲート電極の下方の領域において前記第1の不純物を含む前記SiC結晶からなる第2の不純物拡散抑制層と、
前記n型トランジスタ領域の前記半導体基板、前記第2の不純物拡散抑制層、および前記第2の結晶層内の、前記第2のゲート電極の両側に形成されたn型ソース・ドレイン領域と、
前記n型ソース・ドレイン領域の間に形成され、前記第2の不純物を含み、前記第2の不純物拡散抑制層上の領域における前記第2の不純物の濃度が、前記第2の不純物拡散抑制層下の領域における前記第2の不純物の濃度よりも小さいp型チャネル領域と、
を有し、
前記SiC結晶は前記第2の不純物の拡散を抑制する機能を有し、
前記第1の不純物は、前記C含有Si系結晶内の固定電荷の発生を抑制する機能を有し、
前記第1および前記第2の不純物は、ホウ素であることを特徴とする半導体装置。 - 半導体基板上に形成された結晶層と、
前記結晶層上にゲート絶縁膜を介して形成されたゲート電極と、
前記半導体基板と前記結晶層との間に形成され、前記ゲート電極の下方の領域において第1の不純物を含むC含有Si系結晶からなる不純物拡散抑制層と、
前記半導体基板、前記不純物拡散抑制層、および前記結晶層内の前記ゲート電極の両側に形成され、前記結晶層内にエクステンション領域を有し、p導電型を有する第2の不純物を含むp型ソース・ドレイン領域と、
を備え、
前記C含有Si系結晶は前記第2の不純物の拡散を抑制する機能を有し、
前記第1の不純物は、前記C含有Si系結晶内の固定電荷の発生を抑制する機能を有し、
前記第1および前記第2の不純物は、ホウ素であることを特徴とする半導体装置。 - 前記第1の不純物は、Si系結晶の格子間に侵入することができる程度に原子半径が小さく、かつCと結合する性質を有する元素である、
請求項1または2に記載の半導体装置。 - 前記不純物拡散抑制層の下に前記第1の不純物を含む不純物供給層が形成され、
前記不純物拡散抑制層内の前記第1の不純物の濃度分布は、前記不純物拡散抑制層の厚さ方向の中間よりも下側にピークがある、
請求項2に記載の半導体装置。 - 半導体基板上に形成された結晶層と、
前記結晶層上にゲート絶縁膜を介して形成されたゲート電極と、
前記半導体基板と前記結晶層との間に形成され、前記ゲート電極の下方の領域において第1の不純物を含むC含有Si系結晶からなる不純物拡散抑制層と、
前記半導体基板、前記不純物拡散抑制層、および前記結晶層内の前記ゲート電極の両側に形成され、前記結晶層内にエクステンション領域を有し、p導電型を有する第2の不純物を含むp型ソース・ドレイン領域と、
を備え、
前記C含有Si系結晶は前記第2の不純物の拡散を抑制する機能を有し、
前記第1の不純物は、前記C含有Si系結晶内の固定電荷の発生を抑制する機能を有し、
前記不純物拡散抑制層の下に前記第1の不純物を含む不純物供給層が形成され、
前記不純物拡散抑制層内の前記第1の不純物の濃度分布は、前記不純物拡散抑制層の厚さ方向の中間よりも下側にピークがある、ことを特徴とする半導体装置。
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|---|---|---|---|
| JP2009011768A JP5350815B2 (ja) | 2009-01-22 | 2009-01-22 | 半導体装置 |
| US12/481,981 US8134159B2 (en) | 2009-01-22 | 2009-06-10 | Semiconductor device including a p-type transistor having extension regions in sours and drain regions and method of fabricating the same |
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|---|---|---|---|
| JP2009011768A JP5350815B2 (ja) | 2009-01-22 | 2009-01-22 | 半導体装置 |
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| JP2010171174A JP2010171174A (ja) | 2010-08-05 |
| JP2010171174A5 JP2010171174A5 (ja) | 2011-06-30 |
| JP5350815B2 true JP5350815B2 (ja) | 2013-11-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2903134B2 (ja) * | 1990-11-10 | 1999-06-07 | 株式会社 半導体エネルギー研究所 | 半導体装置 |
| JPH11500873A (ja) * | 1995-12-15 | 1999-01-19 | フィリップス エレクトロニクス ネムローゼ フェンノートシャップ | SiGe層を具えた半導体電界効果デバイス |
| JPH1093076A (ja) * | 1996-09-18 | 1998-04-10 | Oki Electric Ind Co Ltd | Mos型電界効果トランジスタおよびmos型電界効果トランジスタの製造方法 |
| JP2000031481A (ja) * | 1998-07-15 | 2000-01-28 | Nec Corp | 半導体装置およびその製造方法 |
| JP4096416B2 (ja) * | 1998-09-03 | 2008-06-04 | 松下電器産業株式会社 | 電界効果型半導体装置およびその製造方法 |
| US7064399B2 (en) * | 2000-09-15 | 2006-06-20 | Texas Instruments Incorporated | Advanced CMOS using super steep retrograde wells |
| US7491988B2 (en) * | 2004-06-28 | 2009-02-17 | Intel Corporation | Transistors with increased mobility in the channel zone and method of fabrication |
| CN100583450C (zh) * | 2005-03-11 | 2010-01-20 | 富士通微电子株式会社 | 半导体器件及其制造方法 |
| WO2007070321A2 (en) * | 2005-12-09 | 2007-06-21 | Semequip Inc. | System and method for the manufacture of semiconductor devices by the implantation of carbon clusters |
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| US8134159B2 (en) | 2012-03-13 |
| US20100181625A1 (en) | 2010-07-22 |
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