Patent ID: 9190083
Filing Date: 2015-11-17
Classification: B24B,G11B

Abstract:
1. A method of manufacturing a magnetic read-write head, comprising the steps of: presenting a row bar to a processing location relative to a lapping device, the row bar comprising an air bearing surface, at least one read-write head, at least one electronic lapping guide, and at least one trigger device, wherein a reference surface of each electronic lapping guide is positioned at a different distance from the air bearing surface than a reference surface of each trigger device, and wherein the read-write head and at least one of the trigger devices comprise a multi-layer stack of materials; lapping the air bearing surface with the lapping device while measuring the electrical resistance of the at least one electronic lapping guide and the at least one trigger device until the resistance measurement of the at least one trigger device provides an open circuit reading; and measuring an offset resistance value of the at least one electronic lapping guide concurrently with the measurement of the open circuit reading by the at least one trigger device.