Patent ID: 6680815
Filing Date: 2004-01-20
Classification: B82Y,G11B,Y10T

Abstract:
A thin film magnetic head comprising:two magnetic layers magnetically coupled to each other and having two magnetic poles which face each other with a gap layer in between and are to be faced with a recording medium, a thin film coil provided between the two magnetic layers, and an insulating layer for insulating the thin film coil from the two magnetic layers, wherein one of the two magnetic poles includes a first magnetic layer portion extending away from the recordini-medium-facing surface alone the gap layer and having a uniform width for defining a recording track width on the recording medium, the insulating layer includes a first insulating layer having a reference edge for defining the edge on a recording-medium-facing surface side of the insulating layer and formed in a region between the first magnetic layer portion and the thin film coils in the region alone the gap layer, and a second insulating layer for embedding the thin film coils, and one of the two magnetic layers including the one of the two magnetic poles includes the first magnetic layer portion and a second magnetic layer portion covering at least the first insulating layer and magnetically coupled to the first magnetic layer portion, wherein the third magnetic layer portion is surrounded on at least three sides by the second magnetic layer portion.