发明授权
US6136661A Method to fabricate capacitor structures with very narrow features using
silyated photoresist
有权
使用硅化光致抗蚀剂制造具有非常窄特征的电容器结构的方法
- 专利标题: Method to fabricate capacitor structures with very narrow features using silyated photoresist
- 专利标题(中): 使用硅化光致抗蚀剂制造具有非常窄特征的电容器结构的方法
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申请号: US332430申请日: 1999-06-14
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公开(公告)号: US6136661A公开(公告)日: 2000-10-24
- 发明人: Tzu-Shih Yen , Erik S. Jeng
- 申请人: Tzu-Shih Yen , Erik S. Jeng
- 申请人地址: TWX Hsin-Chu
- 专利权人: Vanguard International Semiconductor Corporation
- 当前专利权人: Vanguard International Semiconductor Corporation
- 当前专利权人地址: TWX Hsin-Chu
- 主分类号: G03F7/40
- IPC分类号: G03F7/40 ; H01L21/02 ; H01L21/027 ; H01L21/3213 ; H01L21/8242 ; H01L21/20
摘要:
A method of fabrication of a storage capacitors for DRAM memory cells using silylated photoresist is described. Partially completed DRAM memory cells comprising wordline transistor gates and bitline source and drain regions is provided. Conductive plugs are provided through a dielectric layer to the top surfaces of the bitline drain regions. A first conductive layer is deposited overlying the conductive plugs. A photoresist layer is deposited overlying the first conductive layer. The photoresist layer is etched to define the areas for the lower plates of the storage capacitors. The photoresist is exposed to a silylating agent to form a silylated layer. The top layer of the silylated photoresist is etched through to form a mask for subsequent etching. The photoresist layer is etched as defined by the mask. The first conductive layer is etched as defined by the mask to form the shape of the lower nodes of the storage capacitors. The remaining silylated photoresist is removed. A capacitor dielectric layer is deposited overlying the lower nodes of the storage capacitors. A second conductive layer is deposited to form the upper nodes of the storage capacitors. A passivation layer is deposited to complete fabrication.
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