Read After Write Characteristics of Probe-Type Thin Film Head for Perpendicular Recording

The dependence of write and read characteristics on the spacing for a probe-type head/double-layer perpendicular magnetic recording media system and for a ring head/single-layer perpendicular media system was measured. Write efficiency for the probe-type head/double-layer film system was five times that of the ring head/single-layer film system, and output for the latter was approximately 1/10 that of the former. Thus the probe-type head/double-layer film media system has good read after write efficiency and its spacing loss is small, confirming that it is a good arrangement for application to rigid disk devices.