Magnetic head having a contact detection sensor

摘要

A thermally actuated head for magnetic head for magnetic data recording having a contact sensor for detecting contact between the head and a magnetic disk. The contact sensor includes a thermal sensor film and first and second leads, wherein the leads extend at least as far from the ABS as the thermal sensor film. More preferably the leads extend slightly further from the ABS than the sensor film so that contact between the magnetic disk and the contact sensor occurs at the leads rather than at the sensor film. The sensor film can be constructed of NiFe, preferably having 30-70 atomic percent Ni or more preferably 40-60 atomic percent Ni or most preferably 40-50 atomic percent Ni. The leads are preferably constructed of one or more of Ru, Rh or Ta or an alloy whose primary constituents are Ru, Rh or Ta.

主权项

1. A head for magnetic data recording, comprising
a slider having an air bearing surface; a read sensor formed on the slider; a thermal actuator; a magnetic writer formed on the slider; and a contact sensor formed on the air bearing surface of the slider, the contact sensor including a sensor film having an electrical resistance that changes in response to a change in temperature, and first and second leads connected with opposite ends of the sensor film, wherein each of the first and second leads protrudes from the air bearing surface in a direction perpendicular to the air bearing surface a distance that is at least as great as a distance by which the sensor film protrudes from the air bearing surface.