JP4476313B2 - 成膜方法、成膜装置、および記憶媒体 - Google Patents
成膜方法、成膜装置、および記憶媒体 Download PDFInfo
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Description
本実施形態では、多層レジストの最下層のカーボン膜およびその上に形成されるSi系膜をバッチ式の縦型炉を用いてin−situで成膜する例について説明する。
本実施形態の成膜方法は、エッチング対象膜上に形成される多層レジストに適用可能である。すなわち、多層レジストは、図3に示すように、エッチング対象膜101上に、下から順に、アモルファスカーボン膜(a−C)102、ハードマスク層として形成されるSi系無機膜103、反射防止膜(BARC)104、レジスト膜(PR)105が形成されてなり、フォトリソグラフィによりレジスト膜105をパターン化し、このパターンをSi系無機膜103、アモルファスカーボン膜102に転写し、これら層をマスクとしてエッチング対象膜101をエッチングするものであり、本実施形態では、アモルファスカーボン膜102およびSi系無機膜103を成膜する。
Si系無機膜の成膜に際しては、第2ガス供給機構15によりシリコンソースガスを処理容器1内に導入するとともに、第1ガス供給機構14から酸素含有ガスまたは窒素含有ガスを導入してSiO2膜またはSiN膜を成膜する。
まず、図1に示す装置に50枚の半導体ウエハを装入し、まず、エチレンガスを2000mL/min(sccm)、N2ガスを250mL/min(sccm)の流量で処理容器内に導入し、処理容器内のガス圧力を46550Pa、温度を700℃として、半導体ウエハに形成されたSiO2膜の上にアモルファスカーボン膜を成膜した。
成膜ガス
TEOS:250mL/min(sccm)
O2:10mL/min(sccm)
チャンバ内圧力:200Pa
温度:600℃
14;酸素含有ガス供給機構
15;Siソースガス供給機構
16;パージガス供給機構
21;酸素含有ガス分散ノズル
24;Siソースガス分散ノズル
30;プラズマ生成機構
33;プラズマ電極
35;高周波電源
40;加熱装置
100;成膜装置
101;エッチング対象膜
102;アモルファスカーボン膜
103;Si系無機膜
104;反射防止膜
105;レジスト膜
W;半導体ウエハ(被処理体)
Claims (11)
- 半導体デバイスを製造する際のエッチングマスクとして使用される多層レジスト構造に含まれるアモルファスカーボン膜とSi系無機膜の積層体を形成するための成膜方法であって、
バッチ式縦型炉として構成される成膜装置の処理容器内にエッチング対象膜を有する複数枚の被処理体を垂直方向に間隔をおいて収容する工程と、
次いで、前記処理容器内を第1の減圧圧力および第1の加熱温度に設定するとともに前記処理容器内にカーボンソースガスを含む第1の処理ガスを供給してCVDにより被処理体にアモルファスカーボン膜を成膜する工程と、
次いで、前記第1の処理ガスを停止し、前記処理容器内を減圧状態に維持したまま前記処理容器内にパージガスを供給して前記処理容器内をパージする工程と、
次いで、前記処理容器内を減圧状態に維持したまま前記処理容器内を第2の減圧圧力および第2の加熱温度に移行するとともに前記処理容器内に有機系シリコンソースガスと酸化ガスおよび窒化ガスのいずれかで構成される反応ガスとからなる第2の処理ガスを供給し、CVDにより前記複数の被処理体のアモルファスカーボン膜の上にSiO 2 膜、SiN膜、またはこれらの積層膜として構成されるSi系無機膜を成膜する工程とを有し、
前記カーボン膜を成膜する際の前記第1の加熱温度は600〜800℃であり、
前記Si系無機膜を成膜する工程は、前記有機系シリコンソースガスと前記反応ガスとを処理容器内のパージを挟んで交互的に処理容器内に供給することによりなされることを特徴とする成膜方法。 - 前記カーボンソースガスは、エチレン(C2H4)、メタン(CH4)、エタン(C2H6)、アセチレン(C2H2)、ブチン(C4H6)から選択されるガスであることを特徴とする請求項1に記載の成膜方法。
- アモルファスカーボン膜は熱CVDにより成膜することを特徴とする請求項1または請求項2に記載の成膜方法。
- アモルファスカーボン膜の成膜の際に前記第1の処理ガスをプラズマ化することを特徴とする請求項1から請求項3のいずれか1項に記載の成膜方法。
- 酸素含有ガスまたは窒素含有ガスをプラズマ化して供給することを特徴とする請求項1から請求項4のいずれか1項に記載の成膜方法。
- 前記有機系シリコンソースガスは、エトキシシランガスまたはアミノシランガスであることを特徴とする請求項1から請求項5のいずれか1項に記載の成膜方法。
- 半導体デバイスを製造する際のエッチングマスクとして使用される多層レジスト構造に含まれるアモルファスカーボン膜とSi系無機膜の積層体を形成するための成膜装置であって、
真空保持可能な処理容器と、
前記処理容器内でエッチング対象膜を有する複数枚の被処理体を複数段に保持する保持部材と、
前記処理容器の外周に設けられた加熱装置と、
前記処理容器内へアモルファスカーボン膜を成膜するための第1の処理ガスおよび前記処理容器内へSi系無機膜を成膜するための第2の処理ガスを供給するガス供給機構と、
前記保持部材に保持させた複数枚の被処理体を前記処理容器内に収容させ、次いで、前記処理容器内を第1の減圧圧力および第1の加熱温度に設定するとともに前記処理容器内にカーボンソースガスを含む前記第1の処理ガスを供給してCVDにより被処理体にアモルファスカーボン膜を成膜し、次いで、前記第1の処理ガスを停止し、前記処理容器内を減圧状態に維持したまま前記処理容器内にパージガスを供給して前記処理容器内をパージし、次いで、前記処理容器内を減圧状態に維持したまま前記処理容器内を第2の減圧圧力および第2の加熱温度に移行するとともに前記処理容器内に有機系シリコンソースガスと酸化ガスおよび窒化ガスのいずれかで構成される反応ガスとからなる前記第2の処理ガスを供給し、CVDにより前記複数の被処理体のアモルファスカーボン膜の上にSiO 2 膜、SiN膜、またはこれらの積層膜として構成されるSi系無機膜を成膜するように制御し、前記カーボン膜を成膜する際の前記第1の加熱温度を600〜800℃に制御し、かつ、前記Si系無機膜を成膜する際に、前記有機系シリコンソースガスと前記反応ガスとを処理容器内のパージを挟んで交互的に処理容器内に供給するように制御する制御機構と
を具備することを特徴とする成膜装置。 - 前記アモルファスカーボン膜は熱CVDにより成膜される請求項7に記載の成膜装置。
- 前記アモルファスカーボン膜の成膜の際に、前記第1の処理ガスをプラズマ化して前記処理容器内に導入する機構をさらに具備することを特徴とする請求項7に記載の成膜装置。
- 前記Si系無機膜を成膜する際に、酸素含有ガスまたは窒素含有ガスをプラズマ化して前記処理容器内に導入する機構をさらに具備することを特徴とする請求項7から請求項9のいずれか1項に記載の成膜装置。
- コンピュータ上で動作し、成膜装置を制御するプログラムが記憶された記憶媒体であって、前記プログラムは、実行時に、請求項1から請求項6のいずれかの成膜方法が行われるように、コンピュータに前記成膜装置を制御させることを特徴とする記憶媒体。
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| US12/216,703 US7696106B2 (en) | 2007-07-25 | 2008-07-09 | Film formation method and apparatus for semiconductor process |
| KR1020080071966A KR101131709B1 (ko) | 2007-07-25 | 2008-07-24 | 반도체 처리용 성막 방법, 반도체 처리용 성막 장치, 및컴퓨터로 판독 가능한 매체 |
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| JP5351948B2 (ja) * | 2009-06-04 | 2013-11-27 | 東京エレクトロン株式会社 | アモルファスカーボン膜の形成方法および形成装置 |
| JP2011066164A (ja) * | 2009-09-16 | 2011-03-31 | Tokyo Electron Ltd | マスクパターンの形成方法及び半導体装置の製造方法 |
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| KR101831936B1 (ko) | 2011-12-22 | 2018-02-26 | 삼성전자주식회사 | 박막 형성 방법 및 이를 이용한 반도체 소자의 제조 방법 |
| JP6047039B2 (ja) | 2012-04-20 | 2016-12-21 | 株式会社日立国際電気 | 半導体装置の製造方法、基板処理方法、基板処理装置およびプログラム |
| JP6136613B2 (ja) * | 2012-09-21 | 2017-05-31 | 東京エレクトロン株式会社 | プラズマ処理方法 |
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| JP6091940B2 (ja) * | 2013-03-11 | 2017-03-08 | 株式会社日立国際電気 | 半導体装置の製造方法、基板処理装置およびプログラム |
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