发明授权
- 专利标题: Integrated circuit using a dual poly process
- 专利标题(中): 集成电路使用双重多工艺
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申请号: US09745780申请日: 2000-12-21
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公开(公告)号: US07160801B2公开(公告)日: 2007-01-09
- 发明人: Martin C. Roberts , Sanh D. Tang
- 申请人: Martin C. Roberts , Sanh D. Tang
- 申请人地址: US ID Boise
- 专利权人: Micron Technology, Inc.
- 当前专利权人: Micron Technology, Inc.
- 当前专利权人地址: US ID Boise
- 代理机构: Schwegman, Lundberg, Woessner & Kluth, P.A.
- 主分类号: H01L21/4763
- IPC分类号: H01L21/4763
摘要:
A method for forming an electrical interconnect overlying a buried contact region of a substrate is characterized by a deposition of a first polycrystalline silicon layer and the patterning and etching of same to form a via. The via is formed in the first polycrystalline silicon layer to expose the substrate and a second polycrystalline silicon layer is formed in the via to contact the substrate. Portions of the second polycrystalline silicon layer overlying the first polycrystalline silicon layer are removed eliminating any horizontal interface between the two polycrystalline silicon layers. The first polycrystalline silicon layer remaining after the etch is then patterned to form an electrical interconnect.
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