Patent ID: 6525901
Filing Date: 2003-02-25
Classification: B82Y,G11B

Abstract:
A thin film magnetic head comprising a slider having an air bearing surface opposing to a magnetic recording medium and an inductive type thin film magnetic head element, provided on the end face of the slider in air outflow side, including a first magnetic film, a second magnetic film, a gap film, and thin film coils,the first magnetic film having a first pole portion of which forefront is exposed to the air bearing surface and a first yoke portion which extends backward from the air bearing surface, the second magnetic film having a second pole portion which is opposed to the first pole portion of the first magnetic film and of which forefront is exposed to the air bearing surface and a second yoke portion which extends backward from the air bearing surface and magnetically joined with the first yoke portion of the first magnetic film at a back gap portion, the gap film being provided at least between the first pole portion of the first magnetic film and the second pole portion of the second magnetic film, the thin film coils winding around the back gap portion so as to pass through the magnetic circuit enclosed by the first and second magnetic films and being supported by insulating films, wherein the insulating films to support the thin film coils is provided in between the first and the second yoke portions, and the top thin film coil of the thin film coils has a coil winding body portion with a smaller thickness nearest the air bearing surface than that of a coil winding body portion at the middle between the first and second pole portions and the back gap portion.