METHOD FOR MEASURING NECK HEIGHT OF THIN FILM MAGNETIC HEAD FOR VERTICAL MAGNETIC RECORDING AND METHOD FOR MEASURING GAP DEPTH OF THIN FILM MAGNETIC HEAD FOR HORIZONTAL MAGNETIC RECORDING

摘要

PROBLEM TO BE SOLVED: To provide a method for measuring neck height/gap depth of a thin film magnetic head to accurately and easily measure the neck height and gap depth of a write magnetic pole for the thin film magnetic head whose floating surface position is determined based on the width of a lapping guide.;SOLUTION: A first reference marker 28 is formed at a position away from the design position of a rear edge of the lapping guide by a first preset distance e. A second reference marker 44 is formed away from the design position of a leading edge of the neck by a second preset distance g by calculating a distance f between an actual position of the rear edge 84a of the lapping guide 84 and the first reference marker 28, and a difference (f-e) from the first preset distance e. An actual neck height is calculated by calculating a distance h between an actual position of the leading edge 80c of the neck and the second reference marker 44, and a difference h-g from the second preset distance g, and adding the f-e and h-g on the design neck height.;COPYRIGHT: (C)2008,JPO&INPIT