Patent ID: 8804281
Filing Date: 2014-08-12
Classification: G11B

Abstract:
1. A magnetic writer comprising: A main pole tapering to a narrow pole tip at an air bearing surface (ABS); A pair of side shields, mirror-symmetrically disposed to either side of said pole tip, wherein each of said pair of side shields has a face that is coplanar with said ABS and surrounding said pole tip; wherein said side shields are separated from said pole tip by a gap; wherein a horizontal cross-section of said main pole has a peripheral shape that is symmetric about a centerline, triangular and tapering towards said ABS; wherein said periphery is interrupted by two projections that extend horizontally, co-linearly and symmetrically from said periphery; wherein said projections have an aspect ratio, R, which is the ratio of the horizontal length of said projection, divided by the height of said projection in a direction perpendicular to said ABS; wherein said horizontally co-linear projections are substantially parallel to said ABS and wherein said projections are positioned at a perpendicular distance, denoted d_ABS, from said ABS.