Patent ID: 6108167
Filing Date: 2000-08-22
Classification: G11B

Abstract:
A magnetic head comprising:a magnetic gap disposed on an air bearing surface;a pair of magnetic poles disposed to hold the magnetic gap therebetween, one of the pair of magnetic poles having a magnetic pole tip and an auxiliary magnetic pole, the magnetic pole tip having a contacting portion contacting with the magnetic gap, the contacting portion of the magnetic pole tip and the magnetic gap having a width w0 of a track width direction, the auxiliary magnetic pole having a width of the track width direction wider than the width w0; anda coil positioned between the pair of magnetic poles to intersect the pair of magnetic poles,wherein said one of the pair of magnetic poles has a first magnetic material layer forming the magnetic pole tip and having a saturated magnetic flux density Bs1 and a second magnetic material layer forming the auxiliary magnetic pole and having a saturated magnetic flux density Bs2,the first and the second magnetic material layers contact each other at a contacting portion,the contacting portion of the first and the second magnetic layers has a width w1 of the track width direction, andthe following relation is satisfied:w1/w0.gtoreq.Bs1/Bs2.