发明授权
US07439128B2 Method of creating deep trench capacitor using a P+ metal electrode
有权
使用P +金属电极制造深沟槽电容器的方法
- 专利标题: Method of creating deep trench capacitor using a P+ metal electrode
- 专利标题(中): 使用P +金属电极制造深沟槽电容器的方法
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申请号: US11124324申请日: 2005-05-06
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公开(公告)号: US07439128B2公开(公告)日: 2008-10-21
- 发明人: Ramachandra Divakaruni , Jack A. Mandelman , Dae-Gyu Park
- 申请人: Ramachandra Divakaruni , Jack A. Mandelman , Dae-Gyu Park
- 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
- 代理机构: Scully, Scott, Murphy & Presser, P.C.
- 代理商 Joseph P. Abate, Esq.
- 主分类号: H01L21/8242
- IPC分类号: H01L21/8242
摘要:
The present invention comprises a method including the steps of providing a substrate; forming a trench in the substrate; forming a buried plate in the substrate about the trench; depositing a dielectric layer within the trench; and then depositing a P-type metal atop the dielectric layer, where the dielectric layer is positioned between the P-type metal and the buried plate. Another aspect of the present invention provides a trench capacitor where said trench capacitor comprises a trench formed in a substrate, a buried plate formed in the substrate about the trench; a node dielectric; and a P-type metal liner deposited within the trench, where the P-type metal liner is separated from the buried plate by the node dielectric. A P-type metal is defined as a metal having a work function close to the Si valence band, approximately equal to 5.1 eV.
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