Patent ID: 7934310
Filing Date: 2011-05-03
Classification: G11B,Y10T

Abstract:
1. A process to manufacture a magnetic write head, having a tapered single vertical pole, comprising: on a substrate, depositing a return pole layer; forming, on said return pole layer, a magnetic yoke that includes a well within which is a coil embedded in a layer of insulation that shares a common first upper surface with said yoke; forming a trench, having sloping sides and a depth, that extends downwards from said first upper surface; overfilling said trench with a first layer of a first material that has a magnetic moment of at least 1.8 T and then planarizing until said first upper surface is just exposed, thereby forming a second upper surface, said first layer being a tapered layer by virtue of having been deposited in the trench with the sloping sides; then depositing on said second upper surface a second layer of a second material having a magnetic moment of at least 2 T, thereby forming said magnetic write head, including said tapered single vertical pole; and forming an air bearing surface by planarizing in a plane normal to said upper surfaces.