Patent ID: 8927869
Filing Date: 2015-01-06
Classification: H01B,H01L

Abstract:
1. A method, comprising: forming a metal wiring layer in an organic insulator layer; forming a protective layer over the organic insulator layer; forming a via in the organic insulator layer over the metal wiring layer; depositing a metal layer in the via and on the protective layer; and patterning the metal layer with an etch chemistry that is damaging to the organic insulator layer, wherein the metal layer is Al and the patterning is performed using a chlorine based reactive ion etching process; the metal wiring layer is formed by an electroplating process within a via of an underlying insulator layer; a layer is formed over the metal wiring layer, and under the organic insulator layer; the Al layer is formed by a blanket deposition process; and the forming of the via exposes the metal wiring layer.