Self-aligned corrosion stop for copper C4 and wirebond

Active solid-state devices (e.g. – transistors – solid-state diode – Combined with electrical contact or lead – Solder wettable contact – lead – or bond

Reexamination Certificate

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Details

C257S780000, C257S781000, C257S784000, C257SE23021

Reexamination Certificate

active

07081680

ABSTRACT:
An electrical structure including a substrate and an interconnect. The substrate includes an electrically conductive and corrosion resistant metallic layer on a metal layer. The interconnect is electrically coupled to the metallic layer. A top surface of the metallic layer is above a top surface of the substrate and a bottom surface of the metallic layer is in direct mechanical contact with a first portion of a top surface of the metal layer. The metal layer is unalloyed and includes a metal.

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