发明授权
- 专利标题: Method for forming thin film capacitors
- 专利标题(中): 薄膜电容器的形成方法
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申请号: US782205申请日: 1997-01-10
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公开(公告)号: US5912044A公开(公告)日: 1999-06-15
- 发明人: Mukta Shaji Farooq , Ajay P. Giri , Rajesh Shankerial Patel
- 申请人: Mukta Shaji Farooq , Ajay P. Giri , Rajesh Shankerial Patel
- 申请人地址: NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: NY Armonk
- 主分类号: H01L21/02
- IPC分类号: H01L21/02 ; H05K1/03 ; H05K1/16 ; H05K3/00 ; H05K3/46 ; B05D5/12
摘要:
Thin film capacitors are formed by a multi-level dry processing method that includes simultaneous ablation of via openings through both the dielectric and the metal electrode layers of a capacitor. Preferably, the dielectric films are formed of barium strontium titanate and the metal electrode layers are formed of platinum. The present invention overcomes the problems associated with the use of strong etchants to sequentially form separate via openings through the electrode and dielectric layers, prevents the potential for delamination of the respective layers during wet etching and the possible undesirable effects of etching solutions on substrate materials.
公开/授权文献
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