JP7145819B2 - エッチング方法 - Google Patents
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- JP7145819B2 JP7145819B2 JP2019116471A JP2019116471A JP7145819B2 JP 7145819 B2 JP7145819 B2 JP 7145819B2 JP 2019116471 A JP2019116471 A JP 2019116471A JP 2019116471 A JP2019116471 A JP 2019116471A JP 7145819 B2 JP7145819 B2 JP 7145819B2
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Description
図1は、本実施形態に係るエッチング装置の一例を示す縦断面図である。図1に示すエッチング装置10は、容量結合型プラズマ処理装置である。エッチング装置10は、チャンバ1と排気装置2とゲートバルブ3とを備えている。チャンバ1は、例えばアルミニウムから形成されている。チャンバ1は、円筒形に形成され、表面がアルマイト処理(陽極酸化処理)されている。チャンバ1は、電気的に接地されている。チャンバ1の内部には、処理空間5が形成されている。チャンバ1は、処理空間5を外部の雰囲気から隔離している。チャンバ1には、排気口6と開口部7とがさらに形成されている。排気口6は、チャンバ1の底面に形成されている。開口部7は、チャンバ1の側壁に形成されている。排気装置2は、排気口6を介してチャンバ1の処理空間5に接続されている。排気装置2は、排気口6を介して処理空間5から気体を排気する。ゲートバルブ3は、開口部7を開放したり、開口部7を閉鎖したりする。
図2は、本実施形態に係るエッチング装置によってエッチングされるウェハの構造の一例を示す図である。
次に、本実施形態に係るエッチング方法について説明する。図3は、本実施形態に係るエッチング方法の一例を示すフローチャートである。
チャンバ1内の圧力:3.333Pa(25mTorr)
第1高周波の電力(40MHz):4.9kW
第2高周波の電力(400kHz):7.04kW
処理ガス(第1のガス):C4F8、H2及びXeを含む混合ガス
処理ガス(第2のガス):H2及びO2を含む混合ガス
ウェハの温度:-60℃
5 処理空間
8 載置台
10 エッチング装置
11 支持台
12 静電チャック
21 チラー
27 ウェハ
31 ガスシャワーヘッド
37 処理ガス供給源
41 電力供給装置
42 第1高周波電源
44 第2高周波電源
50 制御部
201 シリコン基板
202 第1の膜
203 マスク
Claims (12)
- エッチング方法であって、
第1の膜の上に形成されたマスクを有する基板を準備する工程と、
第1のガスより生成されたプラズマにて、前記マスクを介して前記第1の膜をエッチングする工程と、
第2のガスより生成されたプラズマにて、前記第1のガスより生成されたプラズマによって生じた前記マスクの開口部の変形部分を削ることにより、前記マスクの形状を補正する工程と、を含み、
前記第1のガスはXe、Kr又はRnを含む、
エッチング方法。 - エッチング方法であって、
第1の膜の上に形成されたマスクを有する基板を準備する工程と、
第1のガスより生成されたプラズマにて、前記マスクを介して前記第1の膜をエッチングする工程と、
第2のガスより生成されたプラズマにて、前記マスクの形状を補正する工程と、を含み、
前記第1のガスはXe、Kr又はRnを含み、
前記第2のガスは、O 2 、N 2 、CO 2 、CO、N 2 O、NF 3 、NH 3 、NO、H 2 及びCl 2 のうち少なくともいずれか1つを含む、
エッチング方法。 - 前記第2のガスは、O 2 、N 2 、CO 2 、CO、N 2 O、NF 3 、NH 3 、NO、H 2 及びCl 2 のうち少なくともいずれか1つを含む、
請求項1に記載のエッチング方法。 - 前記第1の膜は、ナイトライドを含む膜である、
請求項1~3のいずれか1つに記載のエッチング方法。 - 前記第1の膜は、Si3N4及びSiO2のうち少なくともいずれか1つを含む膜である、
請求項1~3のいずれか1つに記載のエッチング方法。 - 前記補正する工程は、前記エッチングする工程の後に実行される、
請求項1~5のいずれか1つに記載のエッチング方法。 - 前記補正する工程は、前記エッチングする工程と同時に実行される、
請求項1~5のいずれか1つに記載のエッチング方法。 - 前記エッチングする工程と前記補正する工程とは、少なくとも1回以上交互に繰り返される、
請求項1~5のいずれか1つに記載のエッチング方法。 - 前記第1のガスは、Xe、XeF2、XeF4、XeF6、XeO4、XeOx、XeO2、XeOxYy、XeOxFy、XeCl2、HXeOXeH、XeH2、Kr、KrF2、Rn及びRnF2のうち少なくともいずれか1つを含む、
請求項1~8のいずれか1つに記載のエッチング方法。 - 前記マスクは、C、W、Ti、TiN、TiO2又はWCである、
請求項1~9のいずれか1つに記載のエッチング方法。 - 前記エッチングする工程及び前記補正する工程は、前記第1の膜を含む前記基板の温度が-70℃~100℃の範囲の条件で実行される、
請求項1~10のいずれか1つに記載のエッチング方法。 - 前記エッチングする工程により前記第1の膜に形成されるホール又は溝のアスペクト比が30以上である、
請求項1~11のいずれか1つに記載のエッチング方法。
Priority Applications (4)
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JP2019116471A JP7145819B2 (ja) | 2019-06-24 | 2019-06-24 | エッチング方法 |
CN202010541013.5A CN112133629A (zh) | 2019-06-24 | 2020-06-15 | 蚀刻方法和蚀刻装置 |
US16/902,209 US11139169B2 (en) | 2019-06-24 | 2020-06-15 | Etching method and etching apparatus |
KR1020200072888A KR20210000274A (ko) | 2019-06-24 | 2020-06-16 | 에칭 방법 및 에칭 장치 |
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JP2021002618A5 JP2021002618A5 (ja) | 2022-04-07 |
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Citations (3)
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JP2001068462A (ja) | 1999-07-20 | 2001-03-16 | Samsung Electronics Co Ltd | 選択的ポリマー蒸着を用いたプラズマエッチング方法及びこれを用いたコンタクトホール形成方法 |
JP2013510445A (ja) | 2009-11-09 | 2013-03-21 | スリーエム イノベイティブ プロパティズ カンパニー | 半導体の異方性エッチングプロセス |
JP2018037656A (ja) | 2016-08-31 | 2018-03-08 | 東京エレクトロン株式会社 | セルフアライン式マルチパターニングのためのその場スペーサ再整形方法及びシステム |
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JP3440735B2 (ja) * | 1996-12-26 | 2003-08-25 | ソニー株式会社 | ドライエッチング方法 |
JPH1116885A (ja) | 1997-06-20 | 1999-01-22 | Sony Corp | ドライエッチング方法 |
JP4033086B2 (ja) * | 2003-09-05 | 2008-01-16 | ヤマハ株式会社 | ドライエッチング方法 |
JP2007116031A (ja) * | 2005-10-24 | 2007-05-10 | Tokyo Electron Ltd | 半導体装置の製造方法、半導体装置の製造装置、制御プログラム及びコンピュータ記憶媒体 |
US7608195B2 (en) * | 2006-02-21 | 2009-10-27 | Micron Technology, Inc. | High aspect ratio contacts |
KR101867998B1 (ko) * | 2011-06-14 | 2018-06-15 | 삼성전자주식회사 | 패턴 형성 방법 |
JP2014007370A (ja) * | 2012-06-01 | 2014-01-16 | Tokyo Electron Ltd | プラズマエッチング方法 |
JP6243722B2 (ja) * | 2013-12-10 | 2017-12-06 | 東京エレクトロン株式会社 | エッチング処理方法 |
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JP2013510445A (ja) | 2009-11-09 | 2013-03-21 | スリーエム イノベイティブ プロパティズ カンパニー | 半導体の異方性エッチングプロセス |
JP2018037656A (ja) | 2016-08-31 | 2018-03-08 | 東京エレクトロン株式会社 | セルフアライン式マルチパターニングのためのその場スペーサ再整形方法及びシステム |
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