Patent ID: 6487042
Filing Date: 2002-11-26
Classification: G11B

Abstract:
A thin-film magnetic head comprising:a write gap layer formed on a lower pole layer, and a first flattening layer, a coil pattern layer, and a second flattening layer laminated in order on the write gap layer excluding the vicinity of an ABS plane; and an upper pole layer formed on the write gap layer at least nearby the ABS plane, wherein the upper pole layer is configured of a front end portion facing to the ABS plane and a yoke portion connected to the front end portion through a junction, wherein magnetic easy axis at the front end portion at the ABS plane is oriented in the film thickness direction of the front end portion; and wherein a concave portion is formed in a recess in the upper of the two pole piece layers at a position separated form the ABS plane, the concave portion is filled with nonmagnetic material, the gap depth between the upper pole layer and the lower pole layer is determined by the concave portion, and the margin of the concave portion near the ABS-plane becomes narrower toward the ABS plane.