JP4256853B2 - 局所的に薄くしたフィンを有するフィン型fet及びその形成方法 - Google Patents
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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
- H01L29/785—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
-
- 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
- H01L29/66787—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
- H01L29/66818—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 the channel being thinned after patterning, e.g. sacrificial oxidation on fin
Description
Claims (12)
- ダブルゲート構造を有したフィン型FETを形成する方法であって、
(a)シリコン基板上に、上面にキャップを備えフィン高さおよびフィン厚さを有する少なくとも1つのフィンを形成するステップと、
(b)前記フィンのボディ領域内でのフィン厚さを薄くするステップと、
(c)全体にわたって前記フィン高さよりも大きな、前記基板の上面からのゲート高さを有し、前記ボディ領域内で、薄くされた前記フィンの側壁および前記キャップを覆って前記フィンと交差するゲートを形成するステップと、
(d)前記ゲート、前記キャップおよび前記フィンを覆ってコンフォーマル層を形成するステップと、
(e)前記コンフォーマル層がソース/ドレイン領域内で前記フィンの側壁から除去されるまで前記コンフォーマル層を方向性エッチングしつつ、前記コンフォーマル層の部分を前記フィン高さのレベルまで前記ゲートの下部側面を覆うように残して、これによって残された前記部分からなるゲート・カバーを形成するステップと、
(f)前記ゲート・カバーによって前記フィンから前記ゲートを分離し、前記キャップを維持しながら、前記フィンの前記ソース/ドレイン領域内でのフィン厚さを、前記フィンの側壁からのエピタキシャル成長により増大させるステップと
を備えることを特徴とする方法。 - 前記方法は、前記ステップ(a)後、前記ボディ領域および前記ソース/ドレイン領域にわたる前記フィンを覆って少なくとも1つの一時的な層を堆積するステップと、前記フィンの前記ボディ領域内で、前記一時的な層に、前記フィンの長手方向に対し交差するダマシン・アパーチャを形成するステップとをさらに備え、
前記ステップ(c)は、前記ダマシン・アパーチャ内に前記ゲートを形成することを特徴とする、請求項1に記載の方法。 - 前記ステップ(b)は、前記ダマシン・アパーチャ内で前記フィンを局所的に薄くし、これによって前記フィンのボディ領域内でのフィン厚さを、前記ステップ(a)で形成した前記フィン厚さより薄くすることを特徴とする、請求項2に記載の方法。
- 前記ステップ(f)は、前記フィンの側壁上にエピタキシャル材料を堆積し、これによって前記ソース/ドレイン領域内での前記フィン厚さを、前記ステップ(a)で形成した前記フィン厚さより増大させることを特徴とする、請求項1に記載の方法。
- 前記ステップ(f)は、前記フィンの側壁上にエピタキシャル材料を堆積し、これによって前記ソース/ドレイン領域内での前記フィン厚さを、前記ステップ(a)で形成した前記フィン厚さより増大させることを特徴とする、請求項2に記載の方法。
- 前記ステップ(f)は、前記フィンの側壁上にエピタキシャル材料を堆積し、これによって前記ソース/ドレイン領域内での前記フィン厚さを、前記ステップ(a)で形成した前記フィン厚さより増大させることを特徴とする、請求項3に記載の方法。
- ダブルゲート構造を有したフィン型FETであって、
シリコン基板上の、上面にキャップを備え、フィン高さおよびフィン厚さを有し、ボディ領域内でのフィン厚さが局所的に薄くされた少なくとも1つのフィンと、
全体にわたって前記フィン高さよりも大きな、前記基板の上面からのゲート高さを有し、前記ボディ領域内で、薄くされた前記フィンの側壁および前記キャップを覆って前記フィンと交差するように形成されたゲートと、
前記ゲート、前記キャップおよび前記フィンを覆って堆積されたコンフォーマル層がソース/ドレイン領域内で前記フィンの側壁から除去されるまで前記コンフォーマル層を方向性エッチングしつつ、前記コンフォーマル層の部分を前記フィン高さのレベルまで前記ゲートの下部側面を覆うように残して、これによって、残された前記部分として形成されたゲート・カバー層と、
前記ゲート・カバーによって前記ゲートから分離して形成され、前記ソース/ドレイン領域内での前記フィンのフィン厚さを増大する前記フィンの側壁からのエピタキシャル材料と、
を備えることを特徴とするフィン型FET。 - 前記ボディ領域および前記ソース/ドレイン領域にわたる前記フィンを覆う一時的な層に、前記ボディ領域内で前記フィンの長手方向に対し交差するように形成されたダマシン・アパーチャによって、前記ゲートが前記フィン型FETの前記ボディ領域に対して自己アラインメントすることを特徴とする、請求項7に記載のフィン型FET。
- 前記ダマシン・アパーチャ内で前記フィンが薄くなり、これによって前記フィンの前記ボディ領域内でのフィン厚さが、前記ゲート・カバー層に接した領域内でのフィン厚さより薄くなっていることを特徴とする、請求項8に記載のフィン型FET。
- 前記フィンは、その側壁上に堆積された前記エピタキシャル材料の層を有し、これによって前記ソース/ドレイン領域内での前記フィン厚さが、前記ゲート・カバー層に接した領域内での前記フィン厚さより増大していることを特徴とする、請求項7に記載のフィン型FET。
- 前記フィンは、その側壁上に堆積された前記エピタキシャル材料の層を有し、これによって前記ソース/ドレイン領域内での前記フィン厚さが、前記ゲート・カバー層に接した領域内での前記フィン厚さより増大していることを特徴とする、請求項8に記載のフィン型FET。
- 前記フィンは、その側壁上に堆積された前記エピタキシャル材料の層を有し、これによって前記ソース/ドレイン領域内での前記フィン厚さが、前記ゲート・カバー層に接した領域内での前記フィン厚さより増大していることを特徴とする、請求項9に記載のフィン型FET。
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US10/800,850 US7087471B2 (en) | 2004-03-15 | 2004-03-15 | Locally thinned fins |
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TW (1) | TWI339406B (ja) |
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JP7028096B2 (ja) | 2018-07-26 | 2022-03-02 | 日本製鉄株式会社 | コークスの強度管理方法 |
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US6252284B1 (en) * | 1999-12-09 | 2001-06-26 | International Business Machines Corporation | Planarized silicon fin device |
US6413802B1 (en) * | 2000-10-23 | 2002-07-02 | The Regents Of The University Of California | Finfet transistor structures having a double gate channel extending vertically from a substrate and methods of manufacture |
US6475869B1 (en) * | 2001-02-26 | 2002-11-05 | Advanced Micro Devices, Inc. | Method of forming a double gate transistor having an epitaxial silicon/germanium channel region |
US6583469B1 (en) * | 2002-01-28 | 2003-06-24 | International Business Machines Corporation | Self-aligned dog-bone structure for FinFET applications and methods to fabricate the same |
US6642090B1 (en) * | 2002-06-03 | 2003-11-04 | International Business Machines Corporation | Fin FET devices from bulk semiconductor and method for forming |
US6864164B1 (en) * | 2002-12-17 | 2005-03-08 | Advanced Micro Devices, Inc. | Finfet gate formation using reverse trim of dummy gate |
US6855607B2 (en) * | 2003-06-12 | 2005-02-15 | Advanced Micro Devices, Inc. | Multi-step chemical mechanical polishing of a gate area in a FinFET |
US7045401B2 (en) * | 2003-06-23 | 2006-05-16 | Sharp Laboratories Of America, Inc. | Strained silicon finFET device |
US6911383B2 (en) * | 2003-06-26 | 2005-06-28 | International Business Machines Corporation | Hybrid planar and finFET CMOS devices |
US7005330B2 (en) * | 2003-06-27 | 2006-02-28 | Taiwan Semiconductor Manufacturing Company, Ltd. | Structure and method for forming the gate electrode in a multiple-gate transistor |
US6812105B1 (en) * | 2003-07-16 | 2004-11-02 | International Business Machines Corporation | Ultra-thin channel device with raised source and drain and solid source extension doping |
US7095065B2 (en) * | 2003-08-05 | 2006-08-22 | Advanced Micro Devices, Inc. | Varying carrier mobility in semiconductor devices to achieve overall design goals |
JP4266138B2 (ja) * | 2003-08-11 | 2009-05-20 | パイオニア株式会社 | 情報記録装置及び最適レーザパワー検出方法 |
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CN100361282C (zh) | 2008-01-09 |
US7087471B2 (en) | 2006-08-08 |
JP2005268782A (ja) | 2005-09-29 |
US20050202608A1 (en) | 2005-09-15 |
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