JP7741177B2 - Hdp犠牲炭素間隙充填 - Google Patents
Hdp犠牲炭素間隙充填Info
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- JP7741177B2 JP7741177B2 JP2023525114A JP2023525114A JP7741177B2 JP 7741177 B2 JP7741177 B2 JP 7741177B2 JP 2023525114 A JP2023525114 A JP 2023525114A JP 2023525114 A JP2023525114 A JP 2023525114A JP 7741177 B2 JP7741177 B2 JP 7741177B2
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- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
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Description
メモリホールのある酸窒化物膜積層体を、HDP CVD処理チャンバ内に配置した。He/Ar/C2H2のプロセスガスを、処理チャンバ内に流した。基板は、500℃の温度及び3mTorrの圧力に保たれた。プラズマはRF源を使用して生成した。アモルファスカーボン(a-C)の層が、基板のメモリホール内に形成された。ボイドがメモリホールに残された。基板を800℃の温度で1時間アニーリングした。炭素膜は800℃のアニーリングに耐え、収縮は≧25%であった。
メモリホールのある酸窒化物膜積層体を、HDP CVD処理チャンバ内に配置した。He/Ar/C2H2のプロセスガスを、処理チャンバ内に流した。基板は、550℃の温度及び10mTorrの圧力に保たれた。プラズマはRF源を使用して生成した。アモルファスカーボン(a-C)の層が、基板のメモリホール内に形成された。ボイドがメモリホールに残された。基板を800℃の温度で1時間アニーリングした。炭素膜は800℃のアニーリングに耐え、収縮は15.5%であった。
メモリホールのある酸窒化物膜積層体を、HDP CVD処理チャンバ内に配置した。H2/He/Ar/C2H2のプロセスガスを、処理チャンバ内に流した。基板は、592℃の温度及び4.2mTorrの圧力に保たれた。プラズマはRF源を使用して生成した。アモルファスカーボン(a-C)の層が、基板のメモリホール内に形成された。ボイドがメモリホールに残された。基板を800℃の温度で1時間アニーリングした。炭素膜は800℃のアニーリングに耐え、収縮は<10%であった。
Claims (20)
- 膜を形成する方法であって、
プロセスガスを高密度プラズマ化学気相堆積(HDP-CVD)チャンバ内に流すことであって、前記チャンバが少なくとも1つのフィーチャを有する基板を収納しており、前記プロセスガスが、水素と炭素(H:C)との比が2:1以下である炭水化物反応物と、水素(H2)、ヘリウム(He)、及びアルゴン(Ar)のうちの1つ又は複数とを含み、前記基板が、400℃から650℃の範囲の温度及び50mTorr未満の圧力で処理される、プロセスガスをチャンバ内に流すことと、
プラズマを生成することと、
炭素膜を前記少なくとも1つのフィーチャ内に堆積させることであって、前記炭素膜が前記少なくとも1つのフィーチャ内にボイドを有する、炭素膜を堆積させることと
を含む方法。 - 前記炭水化物反応物が、アルケン及びアルキンのうちの1つ又は複数を含む、請求項1に記載の方法。
- 前記炭水化物反応物が、アセチレン(C2H2)、プロピレン(C3H6)、エチレン(C2H4)、及びメチルアセチレン(C3H4)からなる群から選択される、請求項2に記載の方法。
- 前記炭素膜がアモルファスカーボン(a-C)膜を含む、請求項1に記載の方法。
- 前記少なくとも1つのフィーチャが、トレンチ、ビア、ワード線スリット、及びメモリホールのうちの1つ又は複数から選択される、請求項1に記載の方法。
- 前記少なくとも1つのフィーチャが50:1以上のアスペクト比を有する、請求項5に記載の方法。
- 前記少なくとも1つのフィーチャが、前記基板の頂面から底表面までのフィーチャの深さに延び、かつ第1の側壁と第2の側壁とによって画定される幅を有しており、前記炭素膜が、前記頂面、前記第1の側壁、前記第2の側壁、及び前記底表面の上に堆積され、前記ボイドが、前記フィーチャの前記底表面から第1の距離にある前記少なくとも1つのフィーチャの前記幅内に位置している、請求項5に記載の方法。
- 膜を形成する方法であって、
プロセスガスを高密度プラズマ化学気相堆積(HDP-CVD)チャンバ内に流すことであって、前記チャンバが基板表面を有する基板を収納しており、前記プロセスガスが、水素と炭素(H:C)との比が2:1以下である炭水化物反応物と、水素(H2)、ヘリウム(He)、及びアルゴン(Ar)のうちの1つ又は複数とを含む、プロセスガスをチャンバ内に流すことと、
プラズマを生成することと、
炭素膜を前記基板表面上に堆積させることであって、前記基板表面がその上に少なくとも1つのフィーチャを有し、前記少なくとも1つのフィーチャが前記基板表面から底表面までの深さに延び、前記少なくとも1つのフィーチャが、第1の側壁と第2の側壁とによって画定される幅を有し、前記炭素膜が、前記基板表面と、前記少なくとも1つのフィーチャの前記第1の側壁、前記第2の側壁、及び前記底表面との上に堆積され、前記炭素膜が、前記フィーチャの前記底表面から第1の距離にある前記フィーチャの幅内に位置するボイドを有する、炭素膜を堆積させることと
を含む方法。 - 前記炭素膜が前記基板表面と実質的に同一平面上にあるように、前記炭素膜をエッチング又は平坦化することと、窒化ケイ素(SiN)又は酸化ケイ素(SiOx)のうちの1つ又は複数を含む第2の膜を、前記基板表面上と、前記炭素膜の頂面上とに堆積させることとをさらに含む、請求項8に記載の方法。
- 前記基板が、400℃から640℃の範囲の温度、及び50mTorr未満の圧力で処理される、請求項8に記載の方法。
- 前記炭水化物反応物が、アセチレン(C2H2)、プロピレン(C3H6)、エチレン(C2H4)、及びメチルアセチレン(C3H4)からなる群から選択される、請求項8に記載の方法。
- 前記炭素膜がアモルファスカーボン(a-C)膜を含む、請求項8に記載の方法。
- 前記基板をアニーリングすることをさらに含み、前記第2の膜がアニーリングの間の炭素膜の収縮を低減する、請求項9に記載の方法。
- 前記フィーチャが10:1以上のアスペクト比を有する、請求項8に記載の方法。
- 前記少なくとも1つのフィーチャの前記深さが50nmから10000nmの範囲である、請求項8に記載の方法。
- メモリデバイスを製造する方法であって、
基板上に膜積層体を形成することであって、前記膜積層体が、第1の材料と第2の材料とが交互になった複数の層を含み、前記膜積層体が積層厚を有する、膜積層体を形成することと、
前記膜積層体をエッチングして、前記膜積層体の頂面から底表面までの深さに延びるメモリホール開口部を形成することであって、前記メモリホール開口部が、第1の側壁と第2の側壁とによって画定される幅を有する、前記膜積層体をエッチングすることと、
前記基板を、高密度プラズマ化学気相堆積(HDP-CVD)チャンバ内にローディングすることと、
プロセスガスを、前記高密度プラズマ化学気相堆積(HDP-CVD)チャンバ内に流すことであって、前記プロセスガスが、水素と炭素(H:C)との比が2:1以下である炭水化物反応物と、水素(H2)、ヘリウム(He)、及びアルゴン(Ar)のうちの1つ又は複数とを含み、前記基板は、400℃から650℃の範囲の温度及び50mTorr未満の圧力で処理される、プロセスガスをチャンバ内に流すことと、
炭素膜を、前記膜積層体の前記頂面上と、前記メモリホール開口部の前記第1の側壁、前記第2の側壁、及び前記底表面との上に堆積させることであって、前記炭素膜が、前記メモリホール開口部の前記底表面から第1の距離にある前記メモリホール開口部の前記幅内に位置するボイドを有する、炭素膜を堆積させることと
を含む方法。 - 前記炭素膜が前記膜積層体の前記頂面と実質的に同一平面上にあるように、前記炭素膜をエッチング又は平坦化することと、第2の膜を、前記膜積層体の前記頂面上と、前記炭素膜の頂面上とに堆積させることとをさらに含む、請求項16に記載の方法。
- 前記炭水化物反応物が、アセチレン(C2H2)、プロピレン(C3H6)、エチレン(C2H4)、及びメチルアセチレン(C3H4)からなる群から選択される、請求項16に記載の方法。
- 前記第2の膜が、窒化ケイ素(SiN)又は酸化ケイ素(SiOx)のうちの1つ又は複数を含む、請求項17に記載の方法。
- 前記第1の材料及び前記第2の材料がそれぞれ、酸化物材料、窒化物材料、及びポリシリコン材料のうちの1つ又は複数を含む、請求項16に記載の方法。
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