JP5315922B2 - 半導体装置の製造方法 - Google Patents
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- JP5315922B2 JP5315922B2 JP2008275421A JP2008275421A JP5315922B2 JP 5315922 B2 JP5315922 B2 JP 5315922B2 JP 2008275421 A JP2008275421 A JP 2008275421A JP 2008275421 A JP2008275421 A JP 2008275421A JP 5315922 B2 JP5315922 B2 JP 5315922B2
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000001039 wet etching Methods 0.000 claims abstract description 33
- 238000001312 dry etching Methods 0.000 claims abstract description 29
- 239000010410 layer Substances 0.000 claims description 128
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- MROCJMGDEKINLD-UHFFFAOYSA-N dichlorosilane Chemical compound Cl[SiH2]Cl MROCJMGDEKINLD-UHFFFAOYSA-N 0.000 description 1
- VXGHASBVNMHGDI-UHFFFAOYSA-N digermane Chemical compound [Ge][Ge] VXGHASBVNMHGDI-UHFFFAOYSA-N 0.000 description 1
- PZPGRFITIJYNEJ-UHFFFAOYSA-N disilane Chemical compound [SiH3][SiH3] PZPGRFITIJYNEJ-UHFFFAOYSA-N 0.000 description 1
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- 229910052739 hydrogen Inorganic materials 0.000 description 1
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- QPJSUIGXIBEQAC-UHFFFAOYSA-N n-(2,4-dichloro-5-propan-2-yloxyphenyl)acetamide Chemical compound CC(C)OC1=CC(NC(C)=O)=C(Cl)C=C1Cl QPJSUIGXIBEQAC-UHFFFAOYSA-N 0.000 description 1
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- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- 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
- H01L29/7842—Field effect transistors with field effect produced by an insulated gate means for exerting mechanical stress on the crystal lattice of the channel region, e.g. using a flexible substrate
- H01L29/7848—Field effect transistors with field effect produced by an insulated gate means for exerting mechanical stress on the crystal lattice of the channel region, e.g. using a flexible substrate the means being located in the source/drain region, e.g. SiGe source and drain
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/02—Semiconductor bodies ; Multistep manufacturing processes therefor
- H01L29/12—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/16—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only elements of Group IV of the Periodic System
- H01L29/161—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only elements of Group IV of the Periodic System including two or more of the elements provided for in group H01L29/16, e.g. alloys
- H01L29/165—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by the materials of which they are formed including, apart from doping materials or other impurities, only elements of Group IV of the Periodic System including two or more of the elements provided for in group H01L29/16, e.g. alloys in different semiconductor regions, e.g. heterojunctions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66568—Lateral single gate silicon transistors
- H01L29/66636—Lateral single gate silicon transistors with source or drain recessed by etching or first recessed by etching and then refilled
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/66007—Multistep manufacturing processes
- H01L29/66075—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials
- H01L29/66227—Multistep manufacturing processes of devices having semiconductor bodies comprising group 14 or group 13/15 materials the devices being controllable only by the electric current supplied or the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched, e.g. three-terminal devices
- H01L29/66409—Unipolar field-effect transistors
- H01L29/66477—Unipolar field-effect transistors with an insulated gate, i.e. MISFET
- H01L29/66742—Thin film unipolar transistors
- H01L29/66772—Monocristalline silicon transistors on insulating substrates, e.g. quartz substrates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- 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
- H01L29/7833—Field effect transistors with field effect produced by an insulated gate with lightly doped drain or source extension, e.g. LDD MOSFET's; DDD MOSFET's
Description
まず、pチャネル型MOSFET(pMOSFET)を例に説明する。
図1はpMOSFETの形成フローの一例を示す図である。また、図2〜図6はpMOSFETの各形成工程の一例の説明図であって、図2はゲート電極形成工程の要部断面模式図、図3はサイドウォールスペーサ形成工程の要部断面模式図、図4は第1リセス形成工程の要部断面模式図、図5は第2リセス形成工程の要部断面模式図、図6は半導体層形成工程の要部断面模式図である。
図7(A)〜(C)は、各成長温度でSiGe層7をエピタキシャル成長させた後の表面の走査型電子顕微鏡(SEM)像を模式的に図示したものである。なお、図7(A)〜(C)のSiGe層7の成長条件は、その成長温度を除き、いずれも同じにしている。
図8はエッチング時間とエッチング量との関係の一例を示す図である。
(付記1) 第1半導体層上にゲート絶縁膜を介してゲート電極を形成する工程と、
前記ゲート電極両側の前記第1半導体層の一部をドライエッチングにより除去することによって第1リセスを形成する工程と、
前記第1リセスの表層部をウェットエッチングにより除去することによって第2リセスを形成する工程と、
前記第2リセスに第2半導体層を形成する工程と、
を有することを特徴とする半導体装置の製造方法。
(付記3) 前記酸化剤は、過酸化水素であり、前記無機アルカリは、アンモニアであることを特徴とする付記2記載の半導体装置の製造方法。
(付記8) 前記第2半導体層は、前記第2リセスに成長温度450℃以上600℃以下でエピタキシャル成長させることによって形成することを特徴とする付記1乃至7のいずれかに記載の半導体装置の製造方法。
前記第1リセスは、前記絶縁層両側の前記第1半導体層の一部を除去して形成し、
前記第2リセスの形成後、前記第2半導体層を、前記絶縁層に対して選択的に前記第2リセスに形成することを特徴とする付記1乃至8のいずれかに記載の半導体装置の製造方法。
(付記11) 前記第1半導体層は、Si層であり、前記第2半導体層は、SiGe層又はSiGeC層であることを特徴とする付記1乃至10のいずれかに記載の半導体装置の製造方法。
(付記13) 前記第1半導体層は、Si層であり、前記第2半導体層は、SiC層であることを特徴とする付記1乃至10のいずれかに記載の半導体装置の製造方法。
2 素子分離領域
3 ゲート絶縁膜
4 ゲート電極
5,5a,5b サイドウォールスペーサ
6a 第1リセス
6b 第2リセス
7 SiGe層
10 モフォロジ劣化箇所
Claims (7)
- 第1半導体層上にゲート絶縁膜を介してゲート電極を形成する工程と、
前記ゲート電極両側の前記第1半導体層の一部を、ドライエッチングにより除去することによって、第1リセスを形成する工程と、
前記第1リセスの表層部を、前記第1半導体層の酸化剤と無機アルカリとを含むエッチング液を用いたウェットエッチングにより除去することによって、第2リセスを形成する工程と、
前記第2リセスに第2半導体層を形成する工程と、
を有することを特徴とする半導体装置の製造方法。 - 前記酸化剤は、過酸化水素であり、前記無機アルカリは、アンモニアであることを特徴とする請求項1に記載の半導体装置の製造方法。
- 前記ウェットエッチングにより除去する前記表層部の厚さは、5nm以上10nm以下であ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の製造方法。
- 前記第2リセスの内壁が前記ウェットエッチングにより酸化されて前記内壁に前記第1半導体層の酸化物が形成され、
前記第2リセスに前記第2半導体層を形成する工程前に、前記第2リセスを、前記酸化物を溶解する溶液に晒す工程を有することを特徴とする請求項1乃至3のいずれかに記載の半導体装置の製造方法。 - 前記第2半導体層は、前記第2リセスに成長温度450℃以上600℃以下でエピタキシャル成長させることによって形成することを特徴とする請求項1乃至4のいずれかに記載の半導体装置の製造方法。
- 前記第1半導体層は、Si層であり、前記第2半導体層は、SiGe層又はSiGeC層であることを特徴とする請求項1乃至5のいずれかに記載の半導体装置の製造方法。
- 前記第1半導体層は、Si層であり、前記第2半導体層は、SiC層であることを特徴とする請求項1乃至5のいずれかに記載の半導体装置の製造方法。
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US12/572,702 US8455324B2 (en) | 2008-10-27 | 2009-10-02 | Method of manufacturing a semiconductor device |
US13/347,139 US8455325B2 (en) | 2008-10-27 | 2012-01-10 | Method of manufacturing a semiconductor device |
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JP5315922B2 true JP5315922B2 (ja) | 2013-10-16 |
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US9034706B2 (en) | 2013-03-13 | 2015-05-19 | Taiwan Semiconductor Manufacturing Company, Ltd. | FinFETs with regrown source/drain and methods for forming the same |
CN103887341A (zh) * | 2014-03-20 | 2014-06-25 | 上海华力微电子有限公司 | 一种场效应晶体管的制备方法 |
CN105225962A (zh) * | 2015-09-22 | 2016-01-06 | 上海华力微电子有限公司 | 一种提高半导体器件性能的方法 |
KR101960763B1 (ko) * | 2016-11-03 | 2019-03-21 | 주식회사 유진테크 | 저온 에피택셜층 형성방법 |
US10211107B1 (en) | 2017-09-10 | 2019-02-19 | United Microelectronics Corp. | Method of fabricating fins including removing dummy fins after fluorocarbon flush step and oxygen clean step |
CN109786380B (zh) | 2017-11-10 | 2020-11-10 | 联华电子股份有限公司 | 半导体存储装置的外延接触结构的制作方法 |
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US7750338B2 (en) * | 2006-12-05 | 2010-07-06 | Taiwan Semiconductor Manufacturing Company, Ltd. | Dual-SiGe epitaxy for MOS devices |
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