Patent ID: 8203805
Filing Date: 2012-06-19
Classification: G11B

Abstract:
1. A method of controlling lubrication migration on a head slider of a hard disk drive the head slider having an air bearing surface (ABS) and a trailing edge, the method comprising: providing at least one recess on the ABS of the head slider, the at least one recess defined by a floor and one or more side walls that define a surface that completely surrounds the floor, wherein the at least one recess is sized and positioned to perform at least one of reducing air stagnation on the ABS and storing lubrication, wherein the ABS comprises a first surface at a first height and a second surface at a second height higher than the first height, and wherein the one or more sidewalls of the at least one recess extend from the first height to the floor, and wherein the second surface comprises a trailing pad, wherein the trailing pad has two sides and is adjacent to the trailing edge, and wherein the at least one recess comprises at least two trenches, at least one trench extending from each side of the trailing pad.