In a thin-film magnetic head manufacturing method and apparatus, lapping is continued until the MR height of a magnetoresistive sensor falls into a finish tolerance range and the lapping time from the beginning of lapping exceeds a predetermined time, thereby substantially reducing the recession between...http://www.google.com/patents/US6299507?utm_source=gb-gplus-sharePatent US6299507 - Thin-film magnetic head manufacturing method and apparatus
