METHOD FOR MEASURING WRITE WIDTH AND/OR READ WIDTH OF A COMPOSITE MAGNETIC HEAD AND A MEASURING DEVICE USING THE METHOD

摘要

A method for measuring a write width and/or a read width of a composite magnetic head in which a read characteristics profile having a peak as a read voltage characteristics for a moving distance is obtained by writing a test data in a designated track of eccentric tracks of such as a DTM by the composite magnetic head (write head), reading the test data from the designated track by moving the composite magnetic head (read head) in a radial direction and crossing the designated track and a write sensitive width or a read sensitive width is calculated on the basis of the read characteristics profile.