Patent ID: 9121888
Filing Date: 2015-09-01
Classification: B82Y,G01R,G11B

Abstract:
1. A method of testing anti-high temperature performance of a read head of a magnetic head, the read head including two shielding layers and an air bearing surface, the shielding layers being placed perpendicularly to the air bearing surface, and the method comprising: applying a plurality of first magnetic fields with different intensities in a first direction to the magnetic head, and measuring a first output parameter curve; repeating to apply a second magnetic field with different intensities in a second direction and applying the first magnetic fields in the first direction synchronously, and measuring a plurality of second output parameter curves; and judging whether a variation that is beyond an allowable value is presented on the first output parameter curve and the second output parameter curves, thereby screening out a defective magnetic head, wherein the first direction is perpendicular to the air bearing surface of the magnetic head, and the second direction is perpendicular to the shielding layers of the magnetic head, in the testing of the anti-high temperature performance of the read head that includes the two shielding layers and the air bearing surface.