发明授权
US07087486B2 Method for scalable, low-cost polysilicon capacitor in a planar DRAM
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在平面DRAM中可扩展的低成本多晶硅电容器的方法
- 专利标题: Method for scalable, low-cost polysilicon capacitor in a planar DRAM
- 专利标题(中): 在平面DRAM中可扩展的低成本多晶硅电容器的方法
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申请号: US10963228申请日: 2004-10-12
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公开(公告)号: US07087486B2公开(公告)日: 2006-08-08
- 发明人: Jeffrey S. Brown , Randy W. Mann
- 申请人: Jeffrey S. Brown , Randy W. Mann
- 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 Anthony J. Canale
- 主分类号: H01L21/8242
- IPC分类号: H01L21/8242
摘要:
Capacitor structures that have increased capacitance without compromising cell area are provided as well as methods for fabricating the same. A first capacitor structure includes insulating material present in holes that are formed in a semiconductor substrate, where the insulating material is thicker on the bottom wall of each capacitor hole as compared to the sidewalls of each hole. In another capacitor structure, deep capacitor holes are provided that have an isolation implant region present beneath each hole.
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