Patent ID: 7089651
Filing Date: 2006-08-15
Classification: G11B,Y10T

Abstract:
1. A method for achieving shape control of photoresist material when forming coil layers in magnetic write heads, comprising: providing a substrate; forming on said substrate a first coil layer; forming, covering said substrate and said first coil layer, a photoresist layer; subjecting said photoresist layer to a softbake process; then subjecting said photoresist layer to a first radiative exposure process using a first photomask and a first radiative exposure source; following said first radiative exposure process, subjecting said photoresist layer to a development process; then subjecting said photoresist layer to a second radiative exposure process using a second photomask and a second radiative exposure source; then subjecting said photoresist layer to a thermal curing process, whereby the photoresist, as a result of the aforesaid thermal and radiative exposure processes, now has an upper surface with a steeply curved rear portion, a steeply sloped apex portion and a flat central portion on which a second coil layer may be advantageously formed.