Invention Application
US20100032809A1 METAL WIRING STRUCTURE FOR INTEGRATION WITH THROUGH SUBSTRATE VIAS 有权
通过基板VIAS集成的金属接线结构

METAL WIRING STRUCTURE FOR INTEGRATION WITH THROUGH SUBSTRATE VIAS
Abstract:
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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