Patent ID: 8638645
Filing Date: 2014-01-28
Classification: G11B

Abstract:
1. A write element for a thermally assisted magnetic head slider, comprising: an air bearing surface facing to a magnetic recording medium; a first magnetic pole, a second magnetic pole, and coils sandwiched between the first magnetic pole and the second magnetic pole; a waveguide for guiding light generated by a light source module mounted on a substrate of the thermally assisted magnetic head slider; and a plasmon unit provided around the first magnetic pole and the waveguide, which has a near-field light generating surface for propagating near-field light to the air bearing surface; wherein the near-field light generating surface of the plasmon unit is apart from the air bearing surface with a first predetermined distance to form a first recess, and the first recess is filled in with a protective layer including low light absorption material that is different from that of the magnetic poles.