发明授权
- 专利标题: Metal wiring structure for integration with through substrate vias
- 专利标题(中): 金属布线结构,用于与基板通孔集成
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申请号: US12188234申请日: 2008-08-08
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公开(公告)号: US07968975B2公开(公告)日: 2011-06-28
- 发明人: David S. Collins , Alvin Joseph , Peter J. Lindgren , Anthony K. Stamper , Kimball M. Watson
- 申请人: David S. Collins , Alvin Joseph , Peter J. Lindgren , Anthony K. Stamper , Kimball M. Watson
- 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 H. Daniel Schnurmann
- 主分类号: H01L29/40
- IPC分类号: H01L29/40 ; H01L21/44
摘要:
An array of through substrate vias (TSVs) is formed through a semiconductor substrate and a contact-via-level dielectric layer thereupon. A metal-wire-level dielectric layer and a line-level metal wiring structure embedded therein are formed directly on the contact-via-level dielectric layer. The line-level metal wiring structure includes cheesing holes that are filled with isolated portions of the metal-wire-level dielectric layer. In one embodiment, the entirety of the cheesing holes is located outside the area of the array of the TSVs to maximize the contact area between the TSVs and the line-level metal wiring structure. In another embodiment, a set of cheesing holes overlying an entirety of seams in the array of TSVs is formed to prevent trapping of any plating solution in the seams of the TSVs during plating to prevent corrosion of the TSVs at the seams.
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