Patent ID: 6096579
Filing Date: 2000-08-01
Classification: H01L

Abstract:
A method for controlling a thickness of a passivation layer, the method comprising:forming a passivation layer over a fuse layer and an anti-reflective coating of a semiconductor device, the anti-reflective layer being formed on a metal layer, the passivation layer being thicker over the anti-reflective coating relative to over the fuse layer;performing a first etching step using a first etchant and Ar to etch the passivation layer to expose thereby the anti-reflective coating; andperforming a second etching step using a second etchant to etch the anti-reflective coating to expose the metal layer, the second etchant comprising at least one of the gases of the group consisting of Cl.sub.2, O.sub.2, BCl.sub.3, and Ar.