- 专利标题: Inexpensive electrode materials to facilitate rutile phase titanium oxide
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申请号: US12708848申请日: 2010-02-19
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公开(公告)号: US08354702B1公开(公告)日: 2013-01-15
- 发明人: Sunil Shanker , Xiangxin Rui , Pragati Kumar , Hanhong Chen , Toshiyuki Hirota
- 申请人: Sunil Shanker , Xiangxin Rui , Pragati Kumar , Hanhong Chen , Toshiyuki Hirota
- 申请人地址: JP
- 专利权人: Elpida Memory, Inc.
- 当前专利权人: Elpida Memory, Inc.
- 当前专利权人地址: JP
- 主分类号: H01L27/108
- IPC分类号: H01L27/108 ; H01L29/76 ; H01L29/94 ; H01L31/119
摘要:
This disclosure provides a method of fabricating a semiconductor stack and associated device, such as a capacitor and DRAM cell. In particular, a bottom electrode has a material selected for lattice matching characteristics. This material may be created from a relatively inexpensive metal oxide which is processed to adopt a conductive, but difficult-to-produce oxide state, with specific crystalline form; to provide one example, specific materials are disclosed that are compatible with the growth of rutile phase titanium dioxide (TiO2) for use as a dielectric, thereby leading to predictable and reproducible higher dielectric constant and lower effective oxide thickness and, thus, greater part density at lower cost.
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