JP2022077990A - 材料構造を改良するための処理 - Google Patents
材料構造を改良するための処理 Download PDFInfo
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- JP2022077990A JP2022077990A JP2021181057A JP2021181057A JP2022077990A JP 2022077990 A JP2022077990 A JP 2022077990A JP 2021181057 A JP2021181057 A JP 2021181057A JP 2021181057 A JP2021181057 A JP 2021181057A JP 2022077990 A JP2022077990 A JP 2022077990A
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- dielectric constant
- high dielectric
- dielectric layer
- plasma
- processing chamber
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Abstract
Description
102 ファクトリインターフェース
104 ロードロックチャンバ
106 ロードロックチャンバ
108 移送チャンバ
110 移送チャンバ
112 移送ロボット
114 移送ロボット
116 チャンバ
118 チャンバ
120 処理チャンバ
122 処理チャンバ
124 処理チャンバ
126 処理チャンバ
128 処理チャンバ
130 処理チャンバ
140 ステーション
142 ファクトリインターフェースロボット
144 前方開口式一体型ポッド(FOUP)
148 ブレード
150 ポート
152 それぞれのポート
154 ポート
156 ポート
158 ポート
160 ポート
162 ポート
164 ポート
166 ポート
168 ポート
170 ポート
172 ポート
174 ポート
176 ポート
190 システムコントローラ
192 中央処理装置(CPU)
194 メモリ
196 サポート回路
200 方法
210 ブロック
220 ブロック
230 ブロック
240 ブロック
250 ブロック
260 ブロック
270 ブロック
280 ブロック
290 ブロック
300 半導体構造
302 基板
304 界面層
306 ゲート誘電体層
400 方法
410 ブロック
420 ブロック
430 ブロック
440 ブロック
450 ブロック
460 ブロック
480 ブロック
500 金属ゲート構造
502 誘電体キャップ層
504 犠牲シリコンキャップ層
506 金属層
Claims (20)
- 半導体構造を形成する方法であって、
基板の表面を前洗浄することと、
前記基板の前洗浄された前記表面上に界面層を形成することと、
前記界面層上に高誘電率誘電体層を堆積させることと、
堆積された前記高誘電率誘電体層内に窒素原子を挿入するように、プラズマ窒化プロセスを実行することと、
プラズマ窒化された前記高誘電率誘電体層内の化学結合を不動態化するように、窒化後アニールプロセスを実行することと、
を含む半導体構造を形成することを含む方法。 - 前記半導体構造を形成することが、真空を破壊することなく処理システム内で実行される、請求項1に記載の方法。
- 前記界面層が、酸化ケイ素(SiO2)を含み、
前記界面層を形成することが、亜酸化窒素(N2O)ガスを利用して前記基板を熱酸化することを含む、請求項1に記載の方法。 - 前記高誘電率誘電体層が、酸化ハフニウム(HfO2)を含む、請求項1に記載の方法。
- 前記プラズマ窒化プロセスが、堆積された前記高誘電率誘電体層を、窒素(N2)およびアンモニア(NH3)ガスの混合物を使用した窒素プラズマに曝すことを含む、請求項1に記載の方法。
- 前記窒化後アニールプロセスが、堆積された前記高誘電率誘電体層を、700℃から850℃の間の温度で、窒素(N2)およびアルゴン(Ar)雰囲気中でスパイクアニールすることを含む、請求項1に記載の方法。
- 堆積された前記高誘電率誘電体層を硬化および高密度化するように、前記プラズマ窒化プロセスの前に堆積後アニールプロセスを実行することを、さらに含む、請求項1に記載の方法。
- 前記堆積後アニールプロセスが、堆積された前記高誘電率誘電体層を、500℃から800℃の間の温度で、窒素(N2)およびアルゴン(Ar)雰囲気中でアニールすることを含む、請求項7に記載の方法。
- プラズマ窒化された前記高誘電率誘電体層内に窒素原子をさらに挿入するように、前記窒化後アニールプロセスの前に熱窒化プロセスを実行することを、さらに含む、請求項1に記載の方法。
- 前記熱窒化プロセスが、プラズマ窒化された前記高誘電率誘電体層を、700℃から900℃の間の温度で、アンモニア(NH3)雰囲気中でアニールすることを含む、請求項9に記載の方法。
- 半導体構造を形成する方法であって、
基板の表面を前洗浄することと、
前記基板上に高誘電率誘電体層を堆積させることと、
堆積された前記高誘電率誘電体層内に窒素原子を挿入するように、プラズマ窒化プロセスを実行することと、
を含む半導体構造を形成することを含む方法。 - 前記半導体構造を形成することが、真空を破壊することなく処理システム内で実行される、請求項11に記載の方法。
- 亜酸化窒素(N2O)ガスを利用して前記基板を熱酸化することを含む、前記基板の前洗浄された前記表面上に界面層を形成することを、さらに含み、前記界面層が、酸化ケイ素(SiO2)を含む、請求項11に記載の方法。
- 前記高誘電率誘電体層が、酸化ハフニウム(HfO2)を含む、請求項11に記載の方法。
- 前記プラズマ窒化プロセスが、堆積された前記高誘電率誘電体層を、窒素(N2)およびアンモニア(NH3)ガスの混合物を使用した窒素プラズマに曝すことを含む、請求項11に記載の方法。
- 前記基板を熱酸化するように、前記プラズマ窒化プロセスの前に再酸化プロセスを実行することと、
プラズマ窒化された前記高誘電率誘電体層内の化学結合を不動態化するように、前記プラズマ窒化プロセスに続いて窒化後アニールプロセスを実行することと、
をさらに含む、請求項11に記載の方法。 - 前記再酸化プロセスが、前記高誘電率誘電体層を、400℃から900℃の間の温度で、酸素(O2)、亜酸化窒素(N2O)、およびH2雰囲気中でアニールすることを含み、
前記窒化後アニールプロセスが、プラズマ窒化された前記高誘電率誘電体層を、700℃から850℃の間の温度で、窒素(N2)およびアルゴン(Ar)雰囲気中でスパイクアニールすることを含む、請求項16に記載の方法。 - プラズマ窒化された前記高誘電率誘電体層内の残りの化学結合を不動態化し、前記基板を熱酸化するように、前記プラズマ窒化プロセスに続いて再酸化プロセスを実行することを、さらに含む、請求項11に記載の方法。
- 前記再酸化プロセスが、前記高誘電率誘電体層を、400℃から900℃の間の温度で、酸素(O2)、亜酸化窒素(N2O)、およびH2雰囲気中でアニールすることを含む、請求項18に記載の方法。
- 第1の処理チャンバ、
第2の処理チャンバ、
第3の処理チャンバ、
第4の処理チャンバ、
第5の処理チャンバ、および
システムコントローラ、
を備える処理システムであって、前記システムコントローラが、
前記第1の処理チャンバ内で、基板の表面を前洗浄することと、
前記第2の処理チャンバ内で、界面層を、前記基板の前洗浄された前記表面上に形成することと、
前記第3の処理チャンバ内で、前記界面層上に高誘電率誘電体層を堆積させることと、
堆積された前記高誘電率誘電体層を、前記第4の処理チャンバ内で、窒素プラズマに曝すことと、
プラズマ窒化された前記高誘電率誘電体層を、前記第5の処理チャンバ内で、アニールすることと、
を行うように構成されており、
前記基板が、前記処理システム内の真空環境を破壊することなく、前記第1の処理チャンバ、前記第2の処理チャンバ、前記第3の処理チャンバ、前記第4の処理チャンバ、および前記第5の処理チャンバの間で移送される、処理システム。
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