JP5199230B2 - 集積回路構造及びその製造方法 - Google Patents
集積回路構造及びその製造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims description 30
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 95
- 229910052732 germanium Inorganic materials 0.000 claims description 94
- 239000004065 semiconductor Substances 0.000 claims description 42
- 239000000758 substrate Substances 0.000 claims description 39
- 238000005530 etching Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 17
- 229910000577 Silicon-germanium Inorganic materials 0.000 claims description 15
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000059 patterning Methods 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 14
- 229910052710 silicon Inorganic materials 0.000 description 14
- 239000010703 silicon Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- 239000003989 dielectric material Substances 0.000 description 9
- 230000037230 mobility Effects 0.000 description 7
- 230000007547 defect Effects 0.000 description 5
- 238000005498 polishing Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- 238000001312 dry etching Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910002601 GaN Inorganic materials 0.000 description 1
- JMASRVWKEDWRBT-UHFFFAOYSA-N Gallium nitride Chemical compound [Ga]#N JMASRVWKEDWRBT-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- YBMRDBCBODYGJE-UHFFFAOYSA-N germanium oxide Inorganic materials O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- PVADDRMAFCOOPC-UHFFFAOYSA-N oxogermanium Chemical compound [Ge]=O PVADDRMAFCOOPC-UHFFFAOYSA-N 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a 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
- H01L29/762—Charge transfer devices
- H01L29/765—Charge-coupled devices
- H01L29/768—Charge-coupled devices with field effect produced by an insulated gate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a 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
- H01L29/785—Field effect transistors with field effect produced by an insulated gate having a channel with a horizontal current flow in a vertical sidewall of a semiconductor body, e.g. FinFET, MuGFET
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a 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
- H01L29/66787—Unipolar field-effect transistors with an insulated gate, i.e. MISFET with a gate at the side of the channel
- H01L29/66795—Unipolar field-effect transistors with an insulated gate, i.e. MISFET with a gate at the side of the channel with a horizontal current flow in a vertical sidewall of a semiconductor body, e.g. FinFET, MuGFET
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a 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
- H01L29/06—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions
- H01L29/10—Semiconductor bodies ; Multistep manufacturing processes therefor characterised by their shape; characterised by the shapes, relative sizes, or dispositions of the semiconductor regions ; characterised by the concentration or distribution of impurities within semiconductor regions with semiconductor regions connected to an electrode not carrying current to be rectified, amplified or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
- H01L29/1025—Channel region of field-effect devices
- H01L29/1029—Channel region of field-effect devices of field-effect transistors
- H01L29/1033—Channel region of field-effect devices of field-effect transistors with insulated gate, e.g. characterised by the length, the width, the geometric contour or the doping structure
- H01L29/1054—Channel region of field-effect devices of field-effect transistors with insulated gate, e.g. characterised by the length, the width, the geometric contour or the doping structure with a variation of the composition, e.g. channel with strained layer for increasing the mobility
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a 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 Table
- 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 Table 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 Table including two or more of the elements provided for in group H01L29/16, e.g. alloys in different semiconductor regions, e.g. heterojunctions
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- Ceramic Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
- Thin Film Transistor (AREA)
Description
半導体基板を準備する工程と、
前記半導体基板の中に、第1の絶縁領域と第2の絶縁領域とを互いに対向するように形成する工程と、
互いに隣接した前記第1の絶縁領域と前記第2の絶縁領域との間に設けられた底部と、前記半導体基板に接触した底面と、を有する水平プレートと、前記水平プレートに隣接するように上方に設けられたフィンとを有する逆T形のエピタキシャル半導体領域を形成する工程と、
前記フィンの頂面及び側壁の頂部にゲート誘電体を形成する工程と、
前記ゲート誘電体の上にゲート電極を形成する工程と、を含むことを特徴とする。
前記半導体基板に接続するように、前記半導体基板上に第1のゲルマニウム含有領域をエピタキシャル形成する工程と、
前記第1のゲルマニウム含有領域上に、前記第1のゲルマニウム含有領域と組成が異なる第2のゲルマニウム含有領域をエピタキシャル形成する工程と、を含んでもよい。
前記第1の絶縁領域と前記第2の絶縁領域との間の前記半導体基板の一部をエッチングして凹部を形成する工程と、
前記凹部の中にゲルマニウム含有材料をエピタキシャル形成する工程と、
前記ゲルマニウム含有材料の上部をパターニングして前記フィンを形成し、前記ゲルマニウム含有材料の下部をエッチングせずに前記水平プレートを形成する工程と、を含み、
前記凹部の底部を、前記第1の絶縁領域の底面より低くないが、前記第1の絶縁領域の頂面より低く設けることにより、前記第1の絶縁領域の第1の側面と、前記第1の側面に対向した前記第2の絶縁領域の第2の側面とが露出されてもよい。
前記半導体基板の中に第1のSTI領域及び第2のSTI領域を形成し、前記第1のSTI領域と前記第2のSTI領域との間に隣接するように水平部分を設ける工程と、
前記半導体基板の一部をエッチングして凹部を形成し、前記凹部の底部を、前記第1のSTI領域の頂面より低いが、前記第1のSTI領域の底面より低くならないように設け、前記凹部により前記第1のSTI領域及び前記第2のSTI領域の側壁を露出させる工程と、
前記凹部の中にゲルマニウム含有領域をエピタキシャル形成する工程と、
前記ゲルマニウム含有領域の上部のみをエッチングすることにより、水平プレートと、前記水平プレートの上方のフィンと、を含む前記ゲルマニウム含有領域の残部を逆T形に形成する工程と、
前記頂面上にゲート誘電体を形成し、前記フィンの上部を覆う工程と、
前記ゲート誘電体の上にゲート電極を形成する工程と、を含むことを特徴とする。
前記水平プレートを覆う誘電体層を形成し、前記フィンの上部が前記誘電体層により覆われない工程をさらに含んでもよい。
半導体基板と、
前記半導体基板の中に形成された第1の絶縁領域及び第2の絶縁領域と、
水平プレート及びフィンを有する逆T形のエピタキシャル領域と、
前記フィンの頂面及び側壁の上部に設けられたゲート誘電体と、
前記ゲート誘電体の上方に設けられたゲート電極と、を備え、
前記水平プレートは、前記第1の絶縁領域と前記第2の絶縁領域との間に隣接するように設けられ、前記水平プレートの底部が、前記半導体基板に接触するとともに前記第1の絶縁領域の底面より低くならないように形成され、
前記フィンは、前記水平プレートに隣接するように上方に設けられていることを特徴とする。
22 STI領域
221 STI領域
222 STI領域
24 凹部
26 マスク
28 底面
30 底部
32 ゲルマニウム含有領域
321 下部
322 上部
331 SiGe層
332 ゲルマニウム層
34 点線
36 ハードマスク
39 凹部
40 フィン
42 水平プレート
43 側壁
44 誘電体材料
46 ゲート誘電体
48 ゲート電極
S 空間
Claims (9)
- 半導体基板を準備する工程と、
前記半導体基板の中に、第1の絶縁領域と第2の絶縁領域とを互いに対向するように形成する工程と、
互いに隣接した前記第1の絶縁領域と前記第2の絶縁領域との間に設けられた底部と、前記半導体基板に接触した底面と、を有する水平プレートと、前記水平プレートに隣接するように上方に設けられたフィンとを有する逆T形のエピタキシャル半導体領域を形成する工程と、
前記フィンの頂面及び側壁の頂部にゲート誘電体を形成する工程と、
前記ゲート誘電体の上にゲート電極を形成する工程と、を含むことを特徴とする集積回路構造の製造方法。 - 前記エピタキシャル半導体領域の形成工程は、
前記半導体基板に接続するように、前記半導体基板上に第1のゲルマニウム含有領域をエピタキシャル形成する工程と、
前記第1のゲルマニウム含有領域上に、前記第1のゲルマニウム含有領域と組成が異なる第2のゲルマニウム含有領域をエピタキシャル形成する工程と、を含むことを特徴とする請求項1に記載の集積回路構造の製造方法。 - 前記エピタキシャル半導体領域の形成工程は、
前記第1の絶縁領域と前記第2の絶縁領域との間の前記半導体基板の一部をエッチングして凹部を形成する工程と、
前記凹部の中にゲルマニウム含有材料をエピタキシャル形成する工程と、
前記ゲルマニウム含有材料の上部をパターニングして前記フィンを形成し、前記ゲルマニウム含有材料の下部をエッチングせずに前記水平プレートを形成する工程と、を含み、 前記凹部の底部を、前記第1の絶縁領域の底面より低くないが、前記第1の絶縁領域の頂面より低く設けることにより、前記第1の絶縁領域の第1の側面と、前記第1の側面に対向した前記第2の絶縁領域の第2の側面とが露出されることを特徴とする請求項1に記載の集積回路構造の製造方法。 - 半導体基板を準備する工程と、
前記半導体基板の中に第1のSTI領域及び第2のSTI領域を形成し、前記第1のSTI領域と前記第2のSTI領域との間に隣接するように水平部分を設ける工程と、
前記半導体基板の一部をエッチングして凹部を形成し、前記凹部の底部を、前記第1のSTI領域の頂面より低いが、前記第1のSTI領域の底面より低くならないように設け、前記凹部により前記第1のSTI領域及び前記第2のSTI領域の側壁を露出させる工程と、
前記凹部の中にゲルマニウム含有領域をエピタキシャル形成する工程と、
前記ゲルマニウム含有領域の上部のみをエッチングすることにより、水平プレートと、前記水平プレートの上方のフィンと、を含む前記ゲルマニウム含有領域の残部を逆T形に形成する工程と、
前記頂面上にゲート誘電体を形成し、前記フィンの上部を覆う工程と、
前記ゲート誘電体の上にゲート電極を形成する工程と、を含むことを特徴とする集積回路構造の製造方法。 - 前記ゲルマニウム含有領域のエッチング工程の後で、前記ゲート誘電体の形成工程の前に、
前記水平プレートを覆う誘電体層を形成し、前記フィンの上部が前記誘電体層により覆われない工程をさらに含むことを特徴とする請求項4に記載の集積回路構造の製造方法。 - 半導体基板と、
前記半導体基板の中に形成された第1の絶縁領域及び第2の絶縁領域と、
水平プレート及びフィンを有する逆T形のエピタキシャル領域と、
前記フィンの頂面及び側壁の上部に設けられたゲート誘電体と、
前記ゲート誘電体の上方に設けられたゲート電極と、を備え、
前記水平プレートは、前記第1の絶縁領域と前記第2の絶縁領域との間に隣接するように設けられ、前記水平プレートの底部が、前記半導体基板に接触するとともに前記第1の絶縁領域の底面より低くならないように形成され、
前記フィンは、前記水平プレートに隣接するように上方に設けられていることを特徴とする集積回路構造。 - 前記水平プレートは、シリコンゲルマニウムからなり、
前記フィンの上部は、純粋なゲルマニウムからなることを特徴とする請求項6に記載の集積回路構造。 - 前記水平プレートは、複数のゲルマニウム層と複数のシリコンゲルマニウム層とが交互に積層された超格子構造を含むことを特徴とする請求項6に記載の集積回路構造。
- 前記第1の絶縁領域及び前記第2の絶縁領域の頂面は、前記水平プレートの頂面と同じ高さの第1の部分を有することを特徴とする請求項6に記載の集積回路構造。
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US12/345,332 US8058692B2 (en) | 2008-12-29 | 2008-12-29 | Multiple-gate transistors with reverse T-shaped fins |
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CN101853882B (zh) | 2009-04-01 | 2016-03-23 | 台湾积体电路制造股份有限公司 | 具有改进的开关电流比的高迁移率多面栅晶体管 |
US8455860B2 (en) | 2009-04-30 | 2013-06-04 | Taiwan Semiconductor Manufacturing Company, Ltd. | Reducing source/drain resistance of III-V based transistors |
US9768305B2 (en) | 2009-05-29 | 2017-09-19 | Taiwan Semiconductor Manufacturing Company, Ltd. | Gradient ternary or quaternary multiple-gate transistor |
US8617976B2 (en) * | 2009-06-01 | 2013-12-31 | Taiwan Semiconductor Manufacturing Company, Ltd. | Source/drain re-growth for manufacturing III-V based transistors |
US9245805B2 (en) * | 2009-09-24 | 2016-01-26 | Taiwan Semiconductor Manufacturing Company, Ltd. | Germanium FinFETs with metal gates and stressors |
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US8058692B2 (en) | 2011-11-15 |
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