Patent ID: 7492555
Filing Date: 2009-02-17
Classification: G11B,Y10T

Abstract:
1. A thin-film magnetic head structure adapted to manufacture a thin-film magnetic head comprising a main magnetic pole layer having a magnetic pole end part on a side of a medium-opposing surface opposing a recording medium; a write shield layer opposing the magnetic pole end part so as to form a recording gap layer on the medium-opposing surface side; a thin-film coil wound about the write shield layer or the main magnetic pole layer; and a base insulating layer formed with a magnetic pole forming depression, filled with the main magnetic pole layer, including a very narrow groove part defining a form of the magnetic pole end part and a main depression integrally extending from an end part of the very narrow groove part remote from the medium-opposing surface, wherein the bottom face of the main depression is positioned at a height lower than that of the bottom face of the very narrow groove part, and wherein the distance between the stepped part and the medium-opposing surface is 0.1 to 0.3 μm.