Patent ID: 8922948
Filing Date: 2014-12-30
Classification: G11B

Abstract:
1. A thin-film magnetic head constructed such that a main magnetic pole layer having a magnetic pole end face on a side of a medium-opposing surface opposing a recording medium, a write shield layer opposing the main magnetic pole layer on the medium-opposing surface side, a gap layer formed between the main magnetic pole layer and write shield layer, and a thin-film coil wound about the write shield layer or main magnetic pole layer are laminated on a substrate; wherein the thin-film coil has a plurality of turn parts arranged at respective positions having different distances from the medium-opposing surface; wherein a non-expandable part made of an insulating material having a coefficient of thermal expansion smaller than that of a photosensitive resin is formed between the turn parts, an upper surface of the non-expandable part being level with an upper surface of the turn parts; wherein the write shield layer is formed with a magnetic material and has a front shield part, a rear shield part, and a connecting shield part connecting the front and rear shield parts to each other, the connecting shield part being in direct contact with both the front shield part and the rear shield part; wherein the write shield layer further includes an opposing shield part that is in direct contact with the gap layer and opposes the main magnetic pole layer through the gap layer; wherein the front shield part, the connecting shield part and the rear shield part are distanced from the medium-opposing surface, an upper surface of the front shield part being level with an upper surface of the rear shield part; wherein the front shield part is closer to the medium-opposing surface than is the thin-film coil; and wherein the rear shield part is further from the medium-opposing surface than is the thin-film coil.