Patent ID: 8184399
Filing Date: 2012-05-22
Classification: G11B

Abstract:
1. A PMR head comprising: a tapered main pole having a distal ABS end, a trailing edge and a leading edge and a thickness in an x-direction that measures the perpendicular separation between said leading edge and said trailing edge, wherein said thickness varies in a y-direction extending proximally from said ABS end and wherein the cross-sectional shape of said main pole in an x-y plane further comprises: a tapered first region, said taper widening proximally from said ABS to attain a maximum thickness, t a second region, being a region of constant maximum thickness t a third region, being a proximal end having a uniform minimum thickness, t a fourth region, being a transition region of varying thickness, providing a continuous transition between said second region of constant maximum thickness t the combined length in the y-direction of the first region and second region is denoted L.