发明授权
- 专利标题: Formation of DRAM capacitor among metal interconnect
- 专利标题(中): 在金属互连中形成DRAM电容
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申请号: US13976085申请日: 2011-10-07
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公开(公告)号: US09565766B2公开(公告)日: 2017-02-07
- 发明人: Nick Lindert , Joseph M. Steigerwald , Kanwal Jit Singh
- 申请人: Nick Lindert , Joseph M. Steigerwald , Kanwal Jit Singh
- 申请人地址: US CA Santa Clara
- 专利权人: Intel Corporation
- 当前专利权人: Intel Corporation
- 当前专利权人地址: US CA Santa Clara
- 代理机构: Finch & Maloney PLLC
- 国际申请: PCT/US2011/055422 WO 20111007
- 国际公布: WO2013/052067 WO 20130411
- 主分类号: H05K1/18
- IPC分类号: H05K1/18 ; H01L27/108 ; H01L49/02 ; H01L23/522 ; H01L23/532
摘要:
Techniques are disclosed for integrating capacitors among the metal interconnect for embedded DRAM applications. In some embodiments, the technique uses a wet etch to completely remove the interconnect metal (e.g., copper) that is exposed prior to the capacitor formation. This interconnect metal removal precludes that metal from contaminating the hi-k dielectric of the capacitor. Another benefit is increased height (surface area) of the capacitor, which allows for increased charge storage. In one example embodiment, an integrated circuit device is provided that includes a substrate having at least a portion of a DRAM bit cell circuitry, an interconnect layer on the substrate and including one or more metal-containing interconnect features, and a capacitor at least partly in the interconnect layer and occupying space from which a metal-containing interconnect feature was removed. The integrated circuit device can be, for example, a processor or a communications device.
公开/授权文献
- US20130271938A1 FORMATION OF DRAM CAPACITOR AMONG METAL INTERCONNECT 公开/授权日:2013-10-17
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