JP7438237B2 - 積層型縦型輸送電界効果トランジスタのためのハイブリッド・ゲート・スタック集積 - Google Patents
積層型縦型輸送電界効果トランジスタのためのハイブリッド・ゲート・スタック集積 Download PDFInfo
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- JP7438237B2 JP7438237B2 JP2021559960A JP2021559960A JP7438237B2 JP 7438237 B2 JP7438237 B2 JP 7438237B2 JP 2021559960 A JP2021559960 A JP 2021559960A JP 2021559960 A JP2021559960 A JP 2021559960A JP 7438237 B2 JP7438237 B2 JP 7438237B2
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- 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
- H01L29/08—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 carrying current to be rectified, amplified or switched and such electrode being part of a semiconductor device which comprises three or more electrodes
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- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
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- H01L21/82—Manufacture or treatment of devices consisting of a plurality of solid state components or integrated circuits formed in, or on, a common substrate with subsequent division of the substrate into plural individual devices to produce devices, e.g. integrated circuits, each consisting of a plurality of components
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Description
Claims (22)
- 半導体構造体を形成する方法であって、
それぞれが、積層型縦型輸送電界効果トランジスタ構造の下側縦型輸送電界効果トランジスタに縦型輸送チャネルを提供する第1の半導体層、前記第1の半導体層の上の分離層、および前記積層型縦型輸送電界効果トランジスタ構造の上側縦型輸送電界効果トランジスタに縦型輸送チャネルを提供する前記分離層の上の第2の半導体層を含む、1つまたは複数の縦型フィンを形成することと、
前記1つまたは複数の縦型フィンのそれぞれの前記第1の半導体層の一部を取り囲む第1のゲート誘電体層および第1のゲート導体層を含む第1のゲート・スタックを形成することと、
前記1つまたは複数の縦型フィンのそれぞれの前記第2の半導体層の一部を取り囲む第2のゲート誘電体層および第2のゲート導体層を含む第2のゲート・スタックを形成することと、
を含み、
前記第1のゲート導体層および前記第2のゲート導体層が同じ材料を含み、
前記第1のゲート導体層がアニールされ、前記第2のゲート導体層がアニールされない、
方法。 - 前記第1のゲート・スタックを形成することがゲートファースト・プロセスを利用することを含み、前記第2のゲート・スタックを形成することがゲートラスト・プロセスを利用することを含む、請求項1に記載の方法。
- 前記下側縦型輸送電界効果トランジスタがn型電界効果トランジスタを含み、前記上側縦型輸送電界効果トランジスタがp型電界効果トランジスタを含む、請求項1に記載の方法。
- 前記第1のゲート導体層が、アニールされた所与の仕事関数金属を含み、前記第2のゲート導体層が、アニールされていない所与の仕事関数金属を含む、請求項1に記載の方法。
- 前記所与の仕事関数金属が窒化チタン(TiN)を含む、請求項4に記載の方法。
- 前記第1のゲート・スタックを形成することが、
前記1つまたは複数の縦型フィンおよび前記1つまたは複数の縦型フィンの前記第1の半導体層の一部を取り囲む第1の下部スペーサの上に前記第1のゲート誘電体層を形成することと、
前記第1のゲート誘電体層の上に前記第1のゲート導体層を形成することと、
前記第1のゲート導体層の上にアモルファス・シリコン層を形成することと、
信頼性アニーリングを実行することと、
前記アモルファス・シリコン層を除去することと、
ゲート・カット・エッチングを実行して、前記1つまたは複数の縦型フィンの側壁から離間した前記第1の下部スペーサの部分の上に形成された前記第1のゲート誘電体層および前記第1のゲート導体層の部分を除去することと、
前記第1のゲート誘電体層および前記第1のゲート導体層の一部を取り囲むように前記第1の下部スペーサの上に層間誘電体層を形成することと、
前記第1のゲート誘電体層および前記第1のゲート導体層を前記層間誘電体層の上面までリセスして、前記第1のゲート・スタックを提供することと、
を含む、請求項1に記載の方法。 - 前記第2のゲート・スタックを形成することが、
前記1つまたは複数の縦型フィンおよび前記1つまたは複数の縦型フィンの前記第2の半導体層の一部を取り囲む第2の下部スペーサの上に前記第2のゲート誘電体層を形成することと、
前記第2のゲート誘電体層の上にキャッピング層を形成することと、
前記キャッピング層の上にアモルファス・シリコン層を形成することと、
信頼性アニーリングを実行することと、
前記アモルファス・シリコン層および前記キャッピング層を除去することと、
前記第2のゲート誘電体層の上に前記第2のゲート導体層を形成することと、
ゲート・カット・エッチングを実行して、前記1つまたは複数の縦型フィンの側壁から離間した前記第2の下部スペーサの部分の上に形成された前記第2のゲート誘電体層および前記第2のゲート導体層の部分を除去することと、
前記第2のゲート誘電体層および前記第2のゲート導体層の一部を取り囲むように前記第2の下部スペーサの上に層間誘電体層を形成することと、
前記第2のゲート誘電体層および前記第2のゲート導体層を前記層間誘電体層の上面までリセスして、前記第2のゲート・スタックを提供することと、
を含む、請求項1に記載の方法。 - 急速熱アニールを実行して、(i)前記下側縦型輸送電界効果トランジスタの第1の下部ソース/ドレイン領域、(ii)前記下側縦型輸送電界効果トランジスタの第1の上部ソース/ドレイン領域、および(iii)前記上側縦型輸送電界効果トランジスタの第2の下部ソース/ドレイン領域に対して同時にドーパント・ドライブインを提供することをさらに含む、請求項1に記載の方法。
- 前記第2の半導体層の上面の上にハード・マスク層をパターニングすることと、
前記パターニングされたハード・マスク層によって露出された前記第2の半導体層および前記分離層をエッチングして、前記1つまたは複数の縦型フィンの第1の部分を形成することと、
前記1つまたは複数の縦型フィンの前記第1の部分の側壁上に第1のライナを形成することと、
前記分離層の下の基板の露出部分をエッチングして、前記1つまたは複数の縦型フィンの前記第1の半導体層の第1の部分を提供することと、
前記1つまたは複数の縦型フィンの前記第1の半導体層の前記第1の部分の側壁上および前記第1のライナの側壁上に第2のライナを形成することと、
前記第2のライナの下の前記基板の露出部分をエッチングして、前記1つまたは複数の縦型フィンの前記第1の半導体層の第2の部分を提供することと、
前記1つまたは複数の縦型フィンの前記第1の半導体層の前記第2の部分の側壁を、前記1つまたは複数の縦型フィンの前記第1の半導体層の前記第1の部分の側壁と一致するように、トリミングすることと、
をさらに含む、請求項1に記載の方法。 - 前記基板の上面の上に、前記1つまたは複数の縦型フィンの前記第1の半導体層の前記第2の部分を取り囲む第1の下部ソース/ドレイン領域を形成することと、
前記第2のライナを除去することと、
前記第1の下部ソース/ドレイン領域をパターニングすることと、
前記第1の下部ソース/ドレイン領域を取り囲むシャロー・トレンチ分離領域を形成することと、
前記第1の下部ソース/ドレイン領域および前記シャロー・トレンチ分離領域の上に第1の下部スペーサを形成することと、
をさらに含む、請求項9に記載の方法。 - 前記第1のゲート・スタックを形成することが、
前記1つまたは複数の縦型フィンおよび前記第1の下部スペーサの上に前記第1のゲート誘電体層を形成することと、
前記第1のゲート誘電体層の上に前記第1のゲート導体層を形成することと、
前記第1のゲート導体層の上にアモルファス・シリコン層を形成することと、
信頼性アニーリングを実行することと、
前記アモルファス・シリコン層を除去することと、
ゲート・カット・エッチングを実行して、前記ハード・マスク層の上および前記第1の下部スペーサの部分の上に形成された前記第1のゲート誘電体層および前記第1のゲート導体層の部分を除去することと、
前記第1のゲート誘電体層および前記第1のゲート導体層の一部を取り囲むように前記第1の下部スペーサの上に第1の層間誘電体層を形成することと、
前記第1のゲート誘電体層および前記第1のゲート導体層を前記第1の層間誘電体層の上面までリセスして、前記第1のゲート・スタックを提供することと、
を含む、請求項10に記載の方法。 - 前記第1のゲート・スタックおよび前記第1の層間誘電体層の上に第1の上部スペーサを形成することと、
前記第1の半導体層の前記第2の部分の残りを取り囲む第1の上部ソース/ドレイン領域を前記第1の上部スペーサの上に形成することと、
前記第1の上部ソース/ドレイン領域、前記分離層、および前記1つまたは複数の縦型フィンの前記第2の半導体層の第1の部分を取り囲む第2の層間誘電体層を形成することと、
前記第1のライナを除去することと、
前記第2の層間誘電体層の上に酸化物層を形成することと、
前記第2の半導体層の露出した側壁および前記1つまたは複数の縦型フィンの前記ハード・マスク層上に第3のライナを形成することと、
前記酸化物層を除去することと、
前記第3のライナの下に前記第2の半導体層の露出した側壁を取り囲む第2の下部ソース/ドレイン領域を形成することと、
前記第2の下部ソース/ドレイン領域を取り囲む第2の下部スペーサを形成することと、
急速熱アニールを実行して、前記第1の下部ソース/ドレイン領域、前記第1の上部ソース/ドレイン領域、および前記第2の下部ソース/ドレイン領域に対してドーパント・ドライブインを提供することと、
をさらに含む、請求項11に記載の方法。 - 前記第2のゲート・スタックを形成することが、
前記1つまたは複数の縦型フィンおよび前記第2の下部スペーサの上に前記第2のゲート誘電体層を形成することと、
前記第2のゲート誘電体層の上にキャッピング層を形成することと、
前記キャッピング層の上に追加のアモルファス・シリコン層を形成することと、
追加の信頼性アニーリングを実行することと、
前記追加のアモルファス・シリコン層および前記キャッピング層を除去することと、
前記第2のゲート誘電体層の上に前記第2のゲート導体層を形成することと、
追加のゲート・カット・エッチングを実行して、前記ハード・マスク層の上および前記第2の下部スペーサの部分の上に形成された前記第2のゲート誘電体層および前記第2のゲート導体層の部分を除去することと、
前記第2のゲート誘電体層および前記第2のゲート導体層の一部を取り囲むように前記第2の下部スペーサの上に第3の層間誘電体層を形成することと、
前記第2のゲート誘電体層および前記第2のゲート導体層を前記第3の層間誘電体層の上面までリセスして、前記第2のゲート・スタックを提供することと、
を含む、請求項12に記載の方法。 - 前記ハード・マスク層を除去することと、
前記第2の半導体層の上面を、前記第3の層間誘電体層の上面と一致するように、リセスすることと、
イオン注入およびレーザ・スパイク・アニールを実行して、前記1つまたは複数の縦型フィンの前記第2の半導体層の上面に上部接合部を形成することと、
前記1つまたは複数の縦型フィンの前記第2の半導体層の前記上面の上に第2の上部ソース/ドレイン領域を形成することと、
レーザ・アニールを実行することと、
をさらに含む、請求項13に記載の方法。 - それぞれが、積層型縦型輸送電界効果トランジスタ構造の下側縦型輸送電界効果トランジスタに縦型輸送チャネルを提供する第1の半導体層、前記第1の半導体層の上の分離層、および前記積層型縦型輸送電界効果トランジスタ構造の上側縦型輸送電界効果トランジスタに縦型輸送チャネルを提供する前記分離層の上の第2の半導体層を含む、1つまたは複数の縦型フィンと、
前記1つまたは複数の縦型フィンのそれぞれの前記第1の半導体層の一部を取り囲む第1のゲート誘電体層および第1のゲート導体層を含む第1のゲート・スタックと、
前記1つまたは複数の縦型フィンのそれぞれの前記第2の半導体層の一部を取り囲む第2のゲート誘電体層および第2のゲート導体層を含む第2のゲート・スタックと、
を備え、
前記第1のゲート導体層および前記第2のゲート導体層が同じ材料を含み、
前記第1のゲート導体層がアニールされ、前記第2のゲート導体層がアニールされていない、
半導体構造体。 - 前記下側縦型輸送電界効果トランジスタがn型電界効果トランジスタを含み、前記上側縦型輸送電界効果トランジスタがp型電界効果トランジスタを含む、請求項15に記載の半導体構造体。
- 前記第1のゲート導体層が、アニールされた所与の仕事関数金属を含み、前記第2のゲート導体層が、アニールされていない前記所与の仕事関数金属を含む、請求項15に記載の半導体構造体。
- 前記所与の仕事関数金属が窒化チタン(TiN)を含む、請求項17に記載の半導体構造体。
- 積層型縦型輸送電界効果トランジスタ構造であって、
それぞれが、前記積層型縦型輸送電界効果トランジスタ構造の下側縦型輸送電界効果トランジスタに縦型輸送チャネルを提供する第1の半導体層、前記第1の半導体層の上の分離層、および前記積層型縦型輸送電界効果トランジスタ構造の上側縦型輸送電界効果トランジスタに縦型輸送チャネルを提供する前記分離層の上の第2の半導体層を含む、1つまたは複数の縦型フィンと、
前記1つまたは複数の縦型フィンのそれぞれの前記第1の半導体層の一部を取り囲む第1のゲート誘電体層および第1のゲート導体層を含む第1のゲート・スタックと、
前記1つまたは複数の縦型フィンのそれぞれの前記第2の半導体層の一部を取り囲む第2のゲート誘電体層および第2のゲート導体層を含む第2のゲート・スタックと、
を備え、
前記第1のゲート導体層および前記第2のゲート導体層が同じ材料を含み、
前記第1のゲート導体層がアニールされ、前記第2のゲート導体層がアニールされていない、
前記積層型縦型輸送電界効果トランジスタ構造、
を備える集積回路。 - 前記下側縦型輸送電界効果トランジスタがn型電界効果トランジスタを含み、前記上側縦型輸送電界効果トランジスタがp型電界効果トランジスタを含む、請求項19に記載の集積回路。
- 前記第1のゲート導体層が、アニールされた所与の仕事関数金属を含み、前記第2のゲート導体層が、アニールされていない前記所与の仕事関数金属を含む、請求項19に記載の集積回路。
- 前記所与の仕事関数金属が窒化チタン(TiN)を含む、請求項21に記載の集積回路。
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