Patent ID: 6366428
Filing Date: 2002-04-02
Classification: B82Y,G11B

Abstract:
A thin film magnetic head comprising a slider, at least one inductive type electromagnetic conversion element and a protection film,the inductive type electromagnetic conversion element including a first magnetic film, a second magnetic film, a gap film, a coil film and an insulating film which are supported by the slider, the forefronts of the first and the second magnetic films being opposed via the gap film in the air bearing surface side of the slider, and thereby, constituting a pole portion the first magnetic film being extended backward from the pole portion on the basis of the air bearing surface, the second magnetic film being extended backward from the pole portion with maintaining a given space for the first magnetic film, and being joined with the first magnetic film, the insulating film, on which the second magnetic film is formed, embedding the space in between the first and the second magnetic films, the coil film being embedded in the insulating film, and being wound spirally around the backward joined portion of the first and the second magnetic films, the protection film covering the at least one inductive type electromagnetic conversion element entirely, wherein the relation of â€œ1&lE;(A/B)&lE;2.5â€  is satisfied, provided that the minimum thickness on the second magnetic film of the protection film is â€œAâ€  and the maximum thickness in the space in between the first and the second magnetic films of the insulating film is â€œBâ€ .