JP5607420B2 - 電界効果トランジスタ(fet)インバータとその製造方法(単一ゲート・インバータのナノワイヤ・メッシュ) - Google Patents
電界効果トランジスタ(fet)インバータとその製造方法(単一ゲート・インバータのナノワイヤ・メッシュ) Download PDFInfo
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- H10D84/0123—Integrating together multiple components covered by H10D12/00 or H10D30/00, e.g. integrating multiple IGBTs
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- H10D84/80—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers characterised by the integration of at least one component covered by groups H10D12/00 or H10D30/00, e.g. integration of IGFETs
- H10D84/82—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers characterised by the integration of at least one component covered by groups H10D12/00 or H10D30/00, e.g. integration of IGFETs of only field-effect components
- H10D84/83—Integrated devices formed in or on semiconductor substrates that comprise only semiconducting layers, e.g. on Si wafers or on GaAs-on-Si wafers characterised by the integration of at least one component covered by groups H10D12/00 or H10D30/00, e.g. integration of IGFETs of only field-effect components of only insulated-gate FETs [IGFET]
- H10D84/85—Complementary IGFETs, e.g. CMOS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10S977/00—Nanotechnology
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- Y10S977/762—Nanowire or quantum wire, i.e. axially elongated structure having two dimensions of 100 nm or less
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10S977/00—Nanotechnology
- Y10S977/902—Specified use of nanostructure
- Y10S977/932—Specified use of nanostructure for electronic or optoelectronic application
- Y10S977/936—Specified use of nanostructure for electronic or optoelectronic application in a transistor or 3-terminal device
- Y10S977/938—Field effect transistors, FETS, with nanowire- or nanotube-channel region
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Description
102:ウェハ
104:SOI層
104a、108a、110a、112a、114a:SOI層104の部分
106:埋め込み酸化物(BOX)層
107、109、113:犠牲層
108、110、112、114:Si層
111:絶縁層
116,120:ハードマスク
118:窒化物ライナ
122:ナノワイヤ・ハードマスク
122a:ナノワイヤ・ハードマスクの窒化物部分
122b:ナノワイヤ・ハードマスクの酸化物部分
123:ナノワイヤ・ハードマスクの幅
124:酸化物層
126:ダミー・ゲート構造体
128:ダミー・ゲートの高さ
130:ダミー・ゲートの長さ
132:矢印
136:フィラー層
138:トレンチ
139:フィラー層の厚さ
140:フィン・スタック
142、154:スペーサ
144:スペーサの長さ
146:スペーサ引下げの長さ
148:フィン・スタックの高さ
150:置換ゲート
152、156、158:コンタクト
Claims (20)
- スタック内で垂直方向に配置され、各々がソース領域、ドレイン領域、及び前記ソース領域と前記ドレイン領域を接続する複数のナノワイヤ・チャネルを有する、複数のデバイス層であって、1つ又は複数の前記デバイス層の前記ソース及びドレイン領域はn型ドーパントでドープされ、1つ又は複数の他の前記デバイス層の前記ソース及びドレイン領域はp型ドーパントでドープされる、前記複数のデバイス層と、
前記ナノワイヤ・チャネルを取り囲む、前記デバイス層の各々に共通のゲートと、
n型ドーパントでドープされた前記1つ又は複数のデバイス層の前記ソース領域への第1のコンタクトと、
p型ドーパントでドープされた前記1つ又は複数の他のデバイス層の前記ソース領域への第2のコンタクトと、
前記デバイス層の各々の前記ドレイン領域への共通の第3のコンタクトとを備え、
前記デバイス層の任意の所与の1つにおける前記ナノワイヤ・チャネルは、10nmから200nmまでのピッチを有し、
前記デバイス層は、前記スタック内においてドープされた犠牲層によって上下に分離され、当該ドープされた犠牲層は、前記スタック内において、前記ソース領域及び前記ドレイン領域の間に存在し、かつ前記ナノワイヤ・チャネルの間には存在しない、電界効果トランジスタ(FET)インバータ。 - 前記デバイス層の任意の所与の1つにおける前記ナノワイヤ・チャネルは、40nmから50nmまでのピッチを有する、請求項1に記載のFETインバータ。
- 前記スタック内の隣接するデバイス層の前記ナノワイヤ・チャネルは、5nmから20nmまでの間隙により互いに分離される、請求項1に記載のFETインバータ。
- 前記n型ドーパントはリン及びヒ素のうちの1つ又は複数を含み、
前記p型ドーパントはホウ素を含む、請求項1に記載のFETインバータ。 - 前記ゲートは前記ナノワイヤ・チャネルから誘電体によって分離される、請求項1に記載のFETインバータ。
- 前記デバイス層の前記ソース及びドレイン領域と前記ゲートとの間のスペーサをさらに備える、請求項1に記載のFETインバータ。
- 前記ゲートはポリシリコン及び金属のうちの1つ又は複数を含む、請求項1に記載のFETインバータ。
- 前記第1のコンタクトはインバータの接地コンタクトとして働き、前記第2のコンタクトは前記インバータの電源コンタクトとして働き、前記ゲートは前記インバータの入力コンタクトとして働き、前記第3のコンタクトは前記インバータの出力コンタクトとして働く、請求項1に記載のFETインバータ。
- 前記第3のコンタクトは前記デバイス層の各々の前記ドレイン領域を短絡する、請求項1に記載のFETインバータ。
- 前記n型ドーパントでドープされた前記1つ又は複数のデバイス層の前記ソース及びドレイン領域と、前記p型ドーパントでドープされた前記1つ又は複数のデバイス層の前記ソース及びドレイン領域とを分離する電気的絶縁層をさらに備える、請求項1に記載のFETインバータ。
- 前記n型ドーパントでドープされた前記1つ又は複数のデバイス層は前記電気的絶縁層の下にあり、前記p型ドーパントでドープされた前記1つ又は複数のデバイス層は前記電気的絶縁層の上にある、請求項10に記載のFETインバータ。
- 前記ナノワイヤ・チャネルはドープされていない、請求項1に記載のFETインバータ。
- FETインバータを製造する方法であって、
スタック内で垂直に配置され、各々がソース領域、ドレイン領域、及び前記ソース領域と前記ドレイン領域を接続する複数のナノワイヤ・チャネルを有する、複数のデバイス層を形成するステップと、
1つ又は複数の前記デバイス層の前記ソース及びドレイン領域にn型ドーパントを導入するステップと、
1つ又は複数の他の前記デバイス層の前記ソース及びドレイン領域にp型ドーパントを導入するステップと、
1つ又は複数の前記デバイス層の前記ソース及びドレイン領域に導入された前記n型ドーパントを活性化するステップと、
1つ又は複数の他の前記デバイス層の前記ソース及びドレイン領域に導入された前記p型ドーパントを活性化するステップと、
前記ナノワイヤ・チャネルを取り囲む、前記デバイス層の各々に共通のゲートを形成するステップと、
前記n型ドーパントでドープされた前記1つ又は複数のデバイス層の前記ソース領域への第1のコンタクトを形成するステップと、
前記p型ドーパントでドープされた前記1つ又は複数の他のデバイス層の前記ソース領域への第2のコンタクトを形成するステップと、
前記デバイス層の各々の前記ドレイン領域への共通の第3のコンタクトを形成するステップとを含み、
前記デバイス層の各々の前記ソース領域及び前記ドレイン領域は前記ゲートに自己整合し、前記n型ドーパントを活性化するステップと前記p型ドーパントを活性化するステップは、前記ゲートを形成するステップの前に実行される、方法。 - 前記デバイス層を前記形成するステップは、
シリコン・オン・インシュレータ(SOI)ウェハを準備するステップと、
前記ウェハの上にシリコン層及び犠牲層の交互配列を形成するステップと、
前記シリコン層及び犠牲層をエッチングしてナノワイヤ・フィンのスタックを形成するステップと、
前記ナノワイヤ・フィンのスタックから前記犠牲層を除去するステップと、をさらに含む、請求項13に記載の方法。 - 前記シリコン層及び犠牲層の交互配列は、前記ウェハ上にエピタキシャルに成長させる、請求項14に記載の方法。
- 前記シリコン層及び犠牲層の上にナノワイヤ・ハードマスクを形成するステップをさらに含む、請求項14に記載の方法。
- 前記ナノワイヤ・ハードマスクは、酸化物部分と該酸化物部分の上の窒化物部分とを有する2重ハードマスク構造体を含む、請求項16に記載の方法。
- 1つ又は複数の前記犠牲層はn型ドーパントでドープされ、
1つ又は複数の前記デバイス層の前記ソース及びドレイン領域にn型ドーパントを前記導入するステップは、前記n型ドーパントでドープされた前記1つ又は複数の犠牲層から前記n型ドーパントを1つ又は複数の前記シリコン層の全域に拡散させるステップをさらに含む、請求項14に記載の方法。 - 1つ又は複数の前記犠牲層はp型ドーパントでドープされ、
1つ又は複数の他の前記デバイス層の前記ソース及びドレイン領域にp型ドーパントを前記導入するステップは、前記p型ドーパントでドープされた前記1つ又は複数の犠牲層から前記p型ドーパントを1つ又は複数の前記シリコン層の全域に拡散させるステップをさらに含む、請求項14に記載の方法。 - 前記ゲートを形成するステップの前に、前記ナノワイヤ・チャネルの上に誘電体を形成するステップをさらに含む、請求項13に記載の方法。
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| US12/470,128 US8084308B2 (en) | 2009-05-21 | 2009-05-21 | Single gate inverter nanowire mesh |
| US12/470128 | 2009-05-21 |
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| KR101081066B1 (ko) | 2011-11-07 |
| US20100295021A1 (en) | 2010-11-25 |
| US8084308B2 (en) | 2011-12-27 |
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