JP2005019996A - ハイブリッド・プレーナおよびFinFETCMOSデバイス - Google Patents
ハイブリッド・プレーナおよびFinFETCMOSデバイス Download PDFInfo
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/201—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates the substrates comprising an insulating layer on a semiconductor body, e.g. SOI
- H10D86/215—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates the substrates comprising an insulating layer on a semiconductor body, e.g. SOI comprising FinFETs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D86/00—Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates
- H10D86/01—Manufacture or treatment
- H10D86/011—Manufacture or treatment comprising FinFETs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/01—Manufacture or treatment
- H10D30/021—Manufacture or treatment of FETs having insulated gates [IGFET]
- H10D30/024—Manufacture or treatment of FETs having insulated gates [IGFET] of fin field-effect transistors [FinFET]
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- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/62—Fin field-effect transistors [FinFET]
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Abstract
【解決手段】 集積半導体回路は、シリコン・オン・インシュレータ(SOI)基板の埋込み絶縁層の上に位置するFinFETとプレーナ単一ゲートFETとを含む。プレーナ単一FETは、SOI基板のパターン化された頂部半導体層の表面上に位置し、FinFETはプレーナ単一ゲートFETに垂直な垂直チャネルを有する。本発明は、また、このような集積回路を形成するための方法も提供する。上記方法の場合には、FinFET能動デバイス領域の幅をトリミングする際にレジスト画像形成とパターン化されたハードマスクを使用し、以降のレジスト画像形成およびエッチングを、FETデバイス領域の厚さを薄くする際に使用する。トリミングされた能動FinFETデバイス領域は、厚さを薄くしたプレーナ単一ゲートFETデバイス領域に垂直になるように形成される。
【選択図】 図14
Description
埋込み絶縁層上に位置する少なくとも1つの頂部半導体層を備えるシリコン・オン・インシュレータ構造を提供するステップであって、前記頂部半導体層が、前記構造のFinFET領域内に位置する少なくとも1つのパターン化されたハードマスクと前記構造のFET領域内に位置する少なくとも1つのパターン化されたハードマスクを有している、ステップと、
FET領域を保護し、前記FinFET領域内の少なくとも1つのパターン化されたハードマスクをトリミングするステップと、
前記埋込み絶縁体層上の前記ハードマスク・ストッピングで保護されていない頂部半導体の露出している部分をエッチングするステップであって、前記エッチングがFinFET能動デバイス領域およびFET能動デバイス領域を形成し、前記FinFET能動デバイス領域がFET能動デバイス領域に垂直となっている、ステップと、
FinFET能動デバイス領域を保護し、及びFET能動デバイス領域を薄くすることで、FETデバイス領域がFinFET能動デバイス領域の高さより低くなるようにするステップと、
FinFET能動デバイス領域の各露出垂直面上にゲート誘電体を形成し、一方、FETデバイス領域の露出水平面上にゲート誘電体を形成するステップと、
ゲート誘電体の各露出面上にパターン化されたゲート電極を形成するステップと、
を含む。
12 底部半導体層
14 埋込み絶縁領域
16 頂部半導体層
18 酸化膜層
20 キャップ層
22,24 パターン化されたフォトレジスト画像
26,28 ハードマスク・パターン
30,36 レジスト・マスク
32 FinFET能動デバイス領域
34 FET能動デバイス領域
40 ゲート誘電体
42 ゲート導体材料
44,46 ゲート電極
48 FinFETスペーサ
50 FETスペーサ
Claims (18)
- 集積半導体回路を形成するための方法であって、
埋込み絶縁層上に位置する少なくとも1つの頂部半導体層を含むシリコン・オン・インシュレータ構造を提供するステップであって、前記頂部半導体層が、前記構造のFinFET領域内に位置する少なくとも1つのパターン化されたハードマスクと前記構造のFET領域内に位置する少なくとも1つのパターン化されたハードマスクとを有する、ステップと、
FET領域を保護し、前記FinFET領域内の前記少なくとも1つのパターン化されたハードマスクをトリミングするステップと、
前記埋込み絶縁体層上の前記ハードマスク・ストッピングで保護されていない前記頂部半導体の露出部分をエッチングするステップであって、前記エッチングが、FinFET能動デバイス領域およびFET能動デバイス領域を形成し、前記FinFET能動デバイス領域が前記FET能動デバイス領域に垂直である、ステップと、
前記FinFET能動デバイス領域を保護し、及び前記FET能動デバイス領域を薄くして、その結果前記FETデバイス領域が、前記FinFET能動デバイス領域の高さより低くなるようにするステップと、
前記FinFET能動デバイス領域の各露出垂直面上にゲート誘電体を形成し、一方で、前記FETデバイス領域の露出水平面上にゲート誘電体を形成するステップと、
前記ゲート誘電体の各露出面上に、パターン化されたゲート電極を形成するステップと、
を有する方法。 - 前記パターン化されたゲート電極と端接するスペーサを形成するステップをさらに有する、請求項1に記載の方法。
- 前記パターン化されたハードマスクが、
前記頂部半導体層の表面上に酸化膜層を形成するステップと、
前記酸化膜層上にキャップ層を形成するステップと、
前記キャップ層の露出表面にフォトレジストを塗布するステップと、
前記フォトレジストを照射パターンに露出するステップと、
前記パターンをフォトレジストに現像するステップと、
前記パターンを前記フォトレジストから前記キャップ層および前記酸化膜層に移送するステップと、
により形成される、請求項1に記載の方法。 - 前記FET領域を保護するステップが、前記FET領域にレジスト・マスクを適用するステップを含む、請求項1に記載の方法。
- 前記トリミング・ステップが、化学的酸化物除去プロセスまたは湿式エッチング・プロセスを含む、請求項1に記載の方法。
- 前記FinFET能動デバイス領域が、(110)の表面オリエンテーションを有し、前記FET能動デバイス領域が(100)の表面オリエンテーションを有する、請求項1に記載の方法。
- 前記FinFET能動デバイス領域を保護する前記ステップが、前記FinFET能動デバイス領域にレジスト・マスクを適用するステップを含む、請求項1に記載の方法。
- 前記FinFET能動デバイス領域が(100)の表面オリエンテーションを有し、前記FETデバイス領域が(110)の表面オリエンテーションを有する、請求項1に記載の方法。
- 前記厚さを薄くするステップが、SiO2に対して高度に選択的なエッチング・プロセスを含む、請求項1に記載の方法。
- 前記ゲート誘電体が、熱酸化プロセスにより形成された酸化物である、請求項1に記載の方法。
- 前記パターン化されたゲート電極が、
ゲート導体材料を堆積するステップと、
前記ゲート導体材料の頂部上にパターン化されたレジストを形成するするステップと、
前記パターン化されたレジストにより保護されていない前記ゲート導体の露出部分をエッチングするステップと、
により形成される、請求項1に記載の方法。 - 集積半導体回路であって、
シリコン・オン・インシュレータ基板の埋込み絶縁層上に位置する少なくとも1つのFinFETと、少なくとも1つのプレーナ単一ゲートFETとを備え、前記少なくとも1つのプレーナ単一ゲートFETが、前記シリコン・オン・インシュレータ基板のパターン化された頂部半導体層を有する能動デバイス領域を含み、前記少なくとも1つのFinFETが、前記少なくとも1つのプレーナ単一ゲートFETに垂直な垂直チャネルを有する、集積半導体回路。 - 前記頂部半導体層がSiからなる、請求項12に記載の集積半導体回路。
- 前記埋込み絶縁層が酸化物からなる、請求項12に記載の集積半導体回路。
- 前記垂直チャネルの高さが、前記少なくとも1つのプレーナ単一ゲートFETの前記パターン化された頂部半導体層より高い、請求項12に記載の集積半導体回路。
- 前記垂直チャネルが、(110)の表面オリエンテーションを有し、前記少なくとも1つのプレーナ単一ゲートFETが(100)の表面オリエンテーションを有する、請求項12に記載の集積半導体回路。
- 前記少なくとも1つのFinFETが二重ゲート・デバイスである、請求項12に記載の集積半導体回路。
- 前記垂直チャネルが、(100)の表面オリエンテーションを有し、前記少なくとも1つのプレーナ単一ゲートFETが(110)の表面オリエンテーションを有する、請求項12に記載の集積半導体回路。
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US10/604,097 US6911383B2 (en) | 2003-06-26 | 2003-06-26 | Hybrid planar and finFET CMOS devices |
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Also Published As
Publication number | Publication date |
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CN1292473C (zh) | 2006-12-27 |
TW200507079A (en) | 2005-02-16 |
TWI283018B (en) | 2007-06-21 |
US7250658B2 (en) | 2007-07-31 |
US20040266076A1 (en) | 2004-12-30 |
CN1591838A (zh) | 2005-03-09 |
US20050263831A1 (en) | 2005-12-01 |
US6911383B2 (en) | 2005-06-28 |
JP4006419B2 (ja) | 2007-11-14 |
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