Patent ID: 6221752
Filing Date: 2001-04-24
Classification: H01L

Abstract:
A method of mending a bonding pad being eroded on a wafer, comprising:forming a passivation layer on the bonding pad and the wafer;forming a polyimide layer on the passivation layer;defining the polyimide layer to expose a part of the passivation layer aligned over the bonding pad;etching the passivation layer to expose a surface of the bonding pad, using the polyimide layer as a mask, wherein a residue remains on the surface of the bonding pad, in which the residue erodes a surface portion of the bonding pad and forms a metal erosion layer thereon;removing the residue from the surface of the bonding pad;stripping the metal erosion layer of the bonding pad by using a plasma to expose a clean surface of the bonding; andforming a protection layer on the clean surface of the bonding pad by using a steam plasma, wherein a thickness of the protection layer is sufficiently thin without affecting subsequent bonding process.