JP4378293B2 - 歪みSiMOSFETを形成するための構造および方法 - Google Patents
歪みSiMOSFETを形成するための構造および方法 Download PDFInfo
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- JP4378293B2 JP4378293B2 JP2005000206A JP2005000206A JP4378293B2 JP 4378293 B2 JP4378293 B2 JP 4378293B2 JP 2005000206 A JP2005000206 A JP 2005000206A JP 2005000206 A JP2005000206 A JP 2005000206A JP 4378293 B2 JP4378293 B2 JP 4378293B2
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- layer
- strained
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- oxide
- relaxed sige
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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]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/62—Fin field-effect transistors [FinFET]
-
- 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]
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/791—Arrangements for exerting mechanical stress on the crystal lattice of the channel regions
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10D—INORGANIC ELECTRIC SEMICONDUCTOR DEVICES
- H10D30/00—Field-effect transistors [FET]
- H10D30/60—Insulated-gate field-effect transistors [IGFET]
- H10D30/67—Thin-film transistors [TFT]
- H10D30/674—Thin-film transistors [TFT] characterised by the active materials
- H10D30/6741—Group IV materials, e.g. germanium or silicon carbide
- H10D30/6748—Group IV materials, e.g. germanium or silicon carbide having a multilayer structure or superlattice structure
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- Thin Film Transistor (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Recrystallisation Techniques (AREA)
Description
12 緩和SiGe層
14 薄い酸化物層
16 第1のポリシリコン層
18 フォトレジスト
20 第1の窒化物スペーサ
22 第2の窒化物スペーサ
24 SiGeブロック
26 歪みSi膜
28 ゲート酸化物
30 第2のポリシリコン層
102 フォトレジスト
104 ソース/ドレイン領域
106 ゲート領域
108 窒化物スペーサ
204 薄い酸化物層
205 ゲート酸化物
206 薄いポリシリコン・スペーサ
207 第1のゲート酸化物
208 第2のゲート酸化物
210 第3のポリシリコン層
Claims (10)
- (1)埋め込み酸化物層を有する基板上に緩和SiGe層を形成するステップと、
(2)前記緩和SiGe層の上側に第1のポリシリコン層を形成するステップと、
(3)前記第1のポリシリコン層をパターニングして、前記第1のポリシリコン層の一部を残すステップと、
(4)前記第1のポリシリコン層の前記一部の側面であって前記緩和SiGe層の上面に、第1の窒化物スペーサを形成するステップと、
(5)前記第1のポリシリコン層の前記一部及び前記第1の窒化物スペーサのいずれによっても覆われていない前記緩和SiGe層を除去するステップと、
(6)前記第1の窒化物スペーサで覆われた前記緩和SiGe層の側面であって前記緩和SiGe層の前記除去により露出された前記埋め込み酸化物層の上に、第2の窒化物スペーサを形成するステップと、
(7)前記第1のポリシリコン層の前記一部及びその下側の前記緩和SiGe層を除去して、一の側面が前記第2の窒化物スペーサで、上面が前記第1の窒化物スペーサで夫々覆われ、且つ、前記第2の窒化物スペーサと反対側の一の側面が露出された緩和SiGeブロックを形成するステップと、
(8)前記緩和SiGeブロックの露出された側面に歪みSi膜をエピタキシャル成長させるステップと、
を備える方法。 - (9)酸化物および高誘電率(k)材料のうちの少なくとも1つを備えるゲート絶縁膜を、前記歪みSi膜の少なくとも1つの側面に形成するステップをさらに備える、請求項1に記載の方法。
- (10)前記第2の窒化物スペーサ、前記第1の窒化物スペーサ及び前記緩和SiGeブロックを除去して前記歪みSi膜の側面を露出させ、該露出されたSi膜の側面に酸化物および高誘電率(k)材料のうちの少なくとも1つを備えるゲート絶縁膜を形成するステップをさらに備える、請求項2に記載の方法。
- 前記歪みSi膜は、厚さが50Å〜200Åであり、さらに前記ゲート絶縁膜は、厚さが9Å〜20Åである、請求項2または3に記載の方法。
- 前記歪みSi膜が、基板に対して垂直方向に配設されたフィンを構成する、請求項1〜4のいずれか1項に記載の方法。
- ステップ(1)と(2)の間に前記緩和SiGe層の上に酸化物層を形成するステップをさらに含み、ステップ(2)において、前記第1のポリシリコン層が該酸化物層上に形成される請求項1〜5のいずれか1項に記載の方法。
- ステップ(3)のパターニングが、
(i)前記第1のポリシリコン層の上にフォトレジストを付してパターン形成するステップと、
(ii)前記フォトレジストで覆われていない前記第1のポリシリコン層及びその下の前記酸化物層をエッチング除去するステップと、
を含む、請求項6記載の方法。 - 前記歪みSi膜の高さが、前記SiGeブロックの高さに実質的に等しい、請求項1〜7のいずれか1項に記載の方法。
- ステップ(2)において形成される第1のポリシリコン層の厚みが、40nm〜100nmである、請求項1〜8のいずれか1項記載の方法。
- ソース及びドレインを備える歪Siフィン、該歪Siフィンの少なくとも一の面上に設けられたゲート酸化膜、及び該ゲート酸化膜上に備えられたポリシリコンを備えるフィン型FETにおいて、
前記歪Siフィンが、埋め込み酸化物を備える基板上に形成された緩和SiGeブロックの一の側面上に備えられ、該緩和SiGeブロックは、その上面が第1の窒化物スペーサで、一の側面が第2の窒化物スペーサで夫々覆われていることを特徴とするフィン型FET。
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/707,690 US7247912B2 (en) | 2004-01-05 | 2004-01-05 | Structures and methods for making strained MOSFETs |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2005197734A JP2005197734A (ja) | 2005-07-21 |
| JP4378293B2 true JP4378293B2 (ja) | 2009-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2005000206A Expired - Fee Related JP4378293B2 (ja) | 2004-01-05 | 2005-01-04 | 歪みSiMOSFETを形成するための構造および方法 |
Country Status (3)
| Country | Link |
|---|---|
| US (2) | US7247912B2 (ja) |
| JP (1) | JP4378293B2 (ja) |
| CN (1) | CN100342507C (ja) |
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| Publication number | Publication date |
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| US20070218620A1 (en) | 2007-09-20 |
| US7749842B2 (en) | 2010-07-06 |
| US7247912B2 (en) | 2007-07-24 |
| JP2005197734A (ja) | 2005-07-21 |
| US20050145954A1 (en) | 2005-07-07 |
| CN1638067A (zh) | 2005-07-13 |
| CN100342507C (zh) | 2007-10-10 |
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