发明授权
- 专利标题: Multilayer MIM capacitor
- 专利标题(中): 多层MIM电容
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申请号: US13352655申请日: 2012-01-18
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公开(公告)号: US08962423B2公开(公告)日: 2015-02-24
- 发明人: Kangguo Cheng , Joseph Ervin , Chengwen Pei , Ravi M. Todi , Geng Wang
- 申请人: Kangguo Cheng , Joseph Ervin , Chengwen Pei , Ravi M. Todi , Geng Wang
- 申请人地址: US 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: US NY Armonk
- 代理商 Catherine Ivers
- 主分类号: H01L21/8242
- IPC分类号: H01L21/8242
摘要:
An improved semiconductor capacitor and method of fabrication is disclosed. A MIM stack, comprising alternating first-type and second-type metal layers (each separated by dielectric) is formed in a deep cavity. The entire stack can be planarized, and then patterned to expose a first area, and selectively etched to recess all first metal layers within the first area. A second selective etch is performed to recess all second metal layers within a second area. The etched recesses can be backfilled with dielectric. Separate electrodes can be formed; a first electrode formed in said first area and contacting all of said second-type metal layers and none of said first-type metal layers, and a second electrode formed in said second area and contacting all of said first-type metal layers and none of said second-type metal layers.
公开/授权文献
- US20130181326A1 MULTILAYER MIM CAPACITOR 公开/授权日:2013-07-18
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