Patent ID: 6395458
Filing Date: 2002-05-28
Classification: C23F,G03F,G11B,H05K

Abstract:
A process for doing photo re-work during manufacture of a structure that is part of a write-head for a magnetic disk system, comprising:providing a lower pole piece; depositing a layer of gap material on the lower pole piece; depositing and patterning a first layer of photoresist on the layer of gap material, thereby forming a first frame; within said first frame, forming a step layer of a non-magnetic material that includes copper; removing said first layer of photoresist; dipping the structure in an aqueous solution of BTA; then coating the structure with a second layer of photoresist; exposing the second layer of photoresist and then developing it, whereby any copper in the step layer that comes into contact with developing solution is unaffected by the development process, thereby forming a second frame. within said second frame, forming an upper pole piece layer; and removing said second layer of photoresist.