Abstract: A thin film magnetic head has first and second magnetic pole layers and, a thin film coil, a magnetic gap layer, and a magnetically insulating layer. The magnetically insulating layer is disposed along a plane facing a recording medium, and divides at least one of the front end section of the first magnetic pole layer and the frond end section of the second magnetic pole layer into a plurality of sub-sections. An additional magnetic pole layer may be provided on at least one of the front end section of the first magnetic pole layer and the front end section of the second magnetic pole layer with a magnetically insulating layer being interposed therebetween. The thin film magnetic head thus fabricated enables the reduction of undershoots to appear at both sides of a main peak of the waveform a signal reproduced by the magnetic head.

Abstract: An ID head is formed after a MR head is formed. An upper shield far from a substrate is a first magnetic pole. A nonmagnetic insulator existing through a magnetic gap on the first magnetic pole determines zero throat height, thereby specifying a recording track width of less than 2 .mu.m. The ID head comprises a front end portion of a second magnetic pole, which is exposed to ABS and partly rides over the nonmagnetic insulator, a nonmagnetic insulator for burying a step by the front end portion, a coil which is formed on the nonmagnetic insulator and covered with a nonmagnetic insulator, and a main body portion of the second magnetic pole formed so as to ride over the coil and front end portion. As a result, it is possible to solved various problems of the ID head in which the front end portion of the second magnetic pole is formed first to realize a narrow track width.

Abstract: A thin film magnetic head has first and second magnetic pole layers and, a thin film coil, a magnetic gap layer, and a magnetically insulating layer. The magnetically insulating layer is disposed along a plane facing a recording medium, and divides at least one of the front end section of the first magnetic pole layer and the frond end section of the second magnetic pole layer into a plurality of sub-sections. An additional magnetic pole layer may be provided on at least one of the front end section of the first magnetic pole layer and the front end section of the second magnetic pole layer with a magnetically insulating layer being interposed therebetween, The thin film magnetic head thus fabricated enables the reduction of undershoots to appear at both sides of a main peak of the waveform a signal reproduced by the magnetic head.