JP6974446B2 - 誘電体材料層を使用してチャネル領域に応力を加えるフィン電界効果トランジスタ(FET)(FinFET) - Google Patents
誘電体材料層を使用してチャネル領域に応力を加えるフィン電界効果トランジスタ(FET)(FinFET) Download PDFInfo
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- JP6974446B2 JP6974446B2 JP2019513978A JP2019513978A JP6974446B2 JP 6974446 B2 JP6974446 B2 JP 6974446B2 JP 2019513978 A JP2019513978 A JP 2019513978A JP 2019513978 A JP2019513978 A JP 2019513978A JP 6974446 B2 JP6974446 B2 JP 6974446B2
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Description
本出願は、2016年9月15日に出願された「FIN FIELD EFFECT TRANSISTORS(FETs)(FINFETs) EMPLOYING DIELECTRIC MATERIAL LAYERS TO APPLY STRESS TO CHANNEL REGIONS」という名称の米国特許出願第15/266,840号の優先権を主張する。米国特許出願第15/266,840号は、その全体が参照により本明細書に組み込まれる。
102 基板
104 フィン
106 酸化物層
108 ソース
110 ドレイン
112 伝導チャネル
114 ゲート
116 応力
200 FinFET
202(1)、202(2) 誘電体材料層
204 応力
206 チャネル領域
208 集積回路
210 基板
212 フィン
214 第1の方向
216 ソース
218 ドレイン
220 ゲート
222 ゲート酸化物層
224 ゲート誘電体材料層
226 仕事関数層
228 導電層
230(1)〜230(4) ゲート構造
232(1) 第1の側
232(2) 第2の側
234(1)、234(2) 上面
236 上面
238 活性領域境界
240 活性層
242(1)、242(2) STI構造
404(1) 第1の側
404(2) 第2の側
406 ゲート領域
408 ドレイン領域
410 ソース材料
412 ドレイン材料
414 第2の方向
500 FinFET
502(1) 第1の側
502(2) 第2の側
504 活性領域境界
506 活性層
600 プロセッサベースシステム
602 中央処理装置(CPU)
604 プロセッサ
606 キャッシュメモリ
608 システムバス
610 メモリコントローラ
612 メモリシステム
614 入力デバイス
616 出力デバイス
618 ネットワークインターフェースデバイス
620 ディスプレイコントローラ
622 ネットワーク
624(0)〜624(M) メモリユニット
626 ディスプレイ
628 ビデオプロセッサ
Claims (13)
- フィン電界効果トランジスタFinFETであって、
基板と、
前記基板の上に配設された第1のフィンであって、
第1のソースと、
第1のドレインと、
前記第1のソースと前記第1のドレインとの間に配設された第1のチャネル領域とを備える第1のフィンと、
前記第1のチャネル領域の周りに配設されたゲートと、
前記基板の上にかつ前記第1のフィンの第1の側の前記第1のチャネル領域に隣接するように配設された第1の誘電体材料層であって、前記第1のチャネル領域に応力を加える第1の誘電体材料層と、
前記基板の上にかつ前記第1の側とは異なる前記第1のフィンの第2の側の前記第1のチャネル領域に隣接するように配設された第2の誘電体材料層であって、前記第1のチャネル領域に応力を加える第2の誘電体材料層と、
前記基板の上にかつ前記第1のフィンに平行に配設された第2のフィンであって、
第2のソースと、
第2のドレインと、
前記第2のフィンの前記第2のソースと前記第2のドレインとの間に配設された第2のチャネル領域とを備える第2のフィンと、
前記第2のフィンの前記第2のチャネル領域の周りに配設された前記ゲートと、
前記基板の上にかつ前記第2のフィンの第2の側の前記第2のチャネル領域に隣接するように配設された第3の誘電体材料層であって、前記第2のフィンの前記第2のチャネル領域に応力を加える第3の誘電体材料層と
を備え、
前記第2の誘電体材料層は、前記第2の誘電体材料層が前記第2のフィンの前記第2のチャネル領域に応力を加えるように、前記基板の上にかつ前記第2の側とは異なる前記第2のフィンの第1の側の前記第2のチャネル領域に隣接するように配設され、
前記第1のフィンと前記第2のフィンとの間の距離が、32ナノメートル以下であり、
前記FinFETの活性層を囲む活性領域境界をさらに備え、前記活性層は、その上に前記ソースおよびドレインが形成された前記基板のドープ領域に対応し、前記第1の誘電体材料層、前記第2の誘電体材料層、および前記第3の誘電体材料層の各々は、前記活性領域境界内のみに配設される、FinFET。 - 前記第1の誘電体材料層の上面は、前記第1のフィンの上面よりも低く、
前記第2の誘電体材料層の上面は、前記第1のフィンの上面よりも低い、請求項1に記載のFinFET。 - 前記FinFETはN型FinFETを備え、
前記第1および第2の誘電体材料層は、前記第1および第2の誘電体材料層が前記第1のチャネル領域に引張応力を加えるように1つまたは複数の酸化物材料を含む、請求項1に記載のFinFET。 - 前記FinFETはP型FinFETを備え、
前記第1および第2の誘電体材料層は、前記第1および第2の誘電体材料層が前記第1のチャネル領域に圧縮応力を加えるように1つまたは複数の酸化物材料を含む、請求項1に記載のFinFET。 - 集積回路ICに組み込まれる、請求項1に記載のFinFET。
- 誘電体材料層を使用してチャネル領域に応力を加えるフィン電界効果トランジスタFinFETを製作するための方法であって、
第1のフィンおよび第2のフィンを備える基板を設けるステップであって、前記第1のフィンは、第1のソースと、第1のドレインと、前記第1のソースと前記第1のドレインとの間に配設された第1のチャネル領域とを備え、前記第2のフィンは、第2のソースと、第2のドレインと、前記第2のソースと前記第2のドレインとの間に配設された第2のチャネル領域とを備える、ステップと、
前記基板の上にかつ前記第1のフィンの第1の側の前記チャネル領域に隣接するように第1の誘電体材料層を配設するステップと、
前記基板の上にかつ前記第1のフィンの第2の側の前記チャネル領域に隣接するように第2の誘電体材料層を配設するステップであって、前記第2の側が前記第1の側とは異なる、ステップと、
前記第1のフィン、前記第2のフィン、前記第1の誘電体材料層、および前記第2の誘電体材料層の上のゲート領域内に、前記FinFETのゲート長に等しい幅を有するゲートを配設するステップとを含み、
前記第1のフィンと前記第2のフィンとの間の距離が、32ナノメートル以下であり、
前記第1の誘電体材料層を配設する前記ステップは、前記基板の上に、かつ前記FinFETの活性層を囲む活性領域境界内のみに、前記第1のフィンの第1の側の前記チャネル領域に隣接するように前記第1の誘電体材料層を配設するステップであって、前記活性層は、その上に前記ソースおよびドレインが形成された前記基板のドープ領域に対応する、ステップを含み、
前記第2の誘電体材料層を配設する前記ステップは、前記基板の上に、かつ前記活性領域境界内のみに、前記第1のフィンの前記第2の側の前記チャネル領域に隣接するように前記第2の誘電体材料層を配設するステップを含む、方法。 - 前記第1の誘電体材料層および前記第2の誘電体材料層をウェットアニールして前記FinFETの前記チャネル領域に加えられる応力を調整するステップをさらに含む、請求項6に記載の方法。
- 前記第1の誘電体材料層および前記第2の誘電体材料層をドライアニールして前記FinFETのチャネル領域に加えられる応力を調整するステップをさらに含む、請求項7に記載の方法。
- 前記ゲートを配設する前記ステップは、
前記FinFETのゲート長に等しい幅を有するゲート酸化物層を前記第1のフィンおよび前記第2のフィンの上の前記ゲート領域内に配設するステップと、
前記ゲート酸化物層、前記第1の誘電体材料層、および前記第2の誘電体材料層の上のゲート領域内に、前記FinFETの前記ゲート長に等しい幅を有するゲート誘電体材料層を配設するステップと、
前記ゲート誘電体材料層の上の前記ゲート領域内に、前記FinFETの前記ゲート長に等しい幅を有する仕事関数層を配設するステップと、
前記仕事関数層の上の前記ゲート領域内に、前記FinFETの前記ゲート長に等しい幅を有する導電層を配設するステップとを含む、請求項6に記載の方法。 - 前記ゲート領域の第1の側の前記FinFETのソース領域に対応する前記第1のフィンをエッチングするステップと、
前記ゲート領域の第1の側とは異なる前記ゲート領域の第2の側の前記FinFETのドレイン領域に対応する前記第1のフィンをエッチングするステップと、
前記ソース領域においてソース材料を成長させるステップと、
前記ドレイン領域内でドレイン材料を成長させるステップとをさらに含む、請求項6に記載の方法。 - 前記第1の誘電体材料層を配設する前記ステップは、流動化学気相堆積を使用して前記基板の上にかつ前記第1のフィンの前記第1の側の前記チャネル領域に隣接するように前記第1の誘電体材料層を配設するステップを含み、
前記第2の誘電体材料層を配設する前記ステップは、流動化学気相堆積を使用して前記基板の上にかつ前記第1のフィンの前記第2の側の前記チャネル領域に隣接するように前記第2の誘電体材料層を配設するステップを含む、請求項6に記載の方法。 - 前記第1の誘電体材料層を配設する前記ステップは、流動化学気相堆積を使用して前記基板の上にかつ前記第1のフィンの前記第1の側に隣接するように1つまたは複数の酸化物材料を配設するステップを含み、
前記第2の誘電体材料層を配設する前記ステップは、流動化学気相堆積を使用して前記基板の上にかつ前記第1のフィンの前記第2の側に隣接するように1つまたは複数の酸化物材料を配設するステップを含む、請求項6に記載の方法。 - 前記第1の誘電体材料層を配設する前記ステップは、高アスペクト比処理を使用して前記基板の上にかつ前記第1のフィンの前記第1の側の前記チャネル領域に隣接するように1つまたは複数の酸化物材料を配設するステップを含み、
前記第2の誘電体材料層を配設する前記ステップは、高アスペクト比処理を使用して前記基板の上にかつ前記第1のフィンの前記第2の側の前記チャネル領域に隣接するように1つまたは複数の酸化物材料を配設するステップを含む、請求項6に記載の方法。
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US15/266,840 | 2016-09-15 | ||
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