Patent ID: 7780344
Filing Date: 2010-08-24
Classification: B82Y,G01R

Abstract:
1. A method for estimating deterioration of a magneto-resistive effect device by imitating a thermal asperity defect condition in said device, comprising: applying a heat shock by pulse laser irradiation having an irradiating time of about 0.1 nsec to about 0.1 msec, and laser energy of 0.1 mW to 30 mW, to a structure including a thin film magnetic head having a magneto-resistive effect device, the heat shock being applied to an area of the structure within a distance range of up to 200 μm from the magneto-resistive effect device, to propagate the heat shock to the magneto-resistive effect device, thereby causing deterioration of the magneto-resistive effect device.