发明申请
- 专利标题: DRAM MIM Capacitor Using Non-Noble Electrodes
- 专利标题(中): DRAM MIM电容器使用非贵重电极
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申请号: US14033326申请日: 2013-09-20
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公开(公告)号: US20150087130A1公开(公告)日: 2015-03-26
- 发明人: Hanhong Chen , David Chi , Imran Hashim , Mitsuhiro Horikawa , Sandra G. Malhotra
- 申请人: Elpida Memory, Inc , Intermolecular, Inc.
- 申请人地址: JP Tokyo US CA San Jose
- 专利权人: Elpida Memory, Inc,Intermolecular, Inc.
- 当前专利权人: Elpida Memory, Inc,Intermolecular, Inc.
- 当前专利权人地址: JP Tokyo US CA San Jose
- 主分类号: H01L49/02
- IPC分类号: H01L49/02
摘要:
A method for forming a capacitor stack includes forming a first bottom electrode layer including a conductive metal nitride material. A second bottom electrode layer is formed above the first bottom electrode layer. The second bottom electrode layer includes a conductive metal oxide material, wherein the crystal structure of the conductive metal oxide material promotes a desired high-k crystal phase of a subsequently deposited dielectric layer. A dielectric layer is formed above the second bottom electrode layer. Optionally, an oxygen-rich metal oxide layer is formed above the dielectric layer. Optionally, a third top electrode layer is formed above the oxygen-rich metal oxide layer. The third top electrode layer includes a conductive metal oxide material. A fourth top electrode layer is formed above the third top electrode layer. The fourth top electrode layer includes a conductive metal nitride material.
公开/授权文献
- US08969169B1 DRAM MIM capacitor using non-noble electrodes 公开/授权日:2015-03-03
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