Patent ID: 8699183
Filing Date: 2014-04-15
Classification: C23C,G11B

Abstract:
1. An apparatus comprising a write pole positioned within a trench, the write pole having first and second pole sidewalls respectively facing first and second trench sidewalls of the trench, the first and second pole sidewalls each having a continuous first taper angle that extends to a write pole tip at a predetermined depth past a first plane on an air bearing surface (ABS), at least two formation layers continuously extending between the first pole and trench sidewalls and around the write pole tip to between the second pole and trench sidewalls, the first and second trench sidewalls each having a continuous second taper angle extending downtrack from the write pole tip on the ABS, the first taper angle being less than the second taper angle, each formation layer having a different taper angle than the second taper angle to transition from the second taper angle to the first taper angle.