Patent ID: 6721132
Filing Date: 2004-04-13
Classification: B82Y,G11B,Y10S

Abstract:
An inductive head comprising a lower magnetic core formed on a substrate, a magnetic pole tip layer formed on the lower magnetic core, an upper magnetic core coupled in its front end to the magnetic pole tip layer, coupled in its rear end to the lower magnetic core, having a width of the front end smaller than that of the rear end, and having at least partially a shape gradually reducing the width from the rear end to the front end, coils disposed between the upper magnetic core and the lower magnetic core, and an insulating layer formed between the coils and the upper magnetic core or the lower magnetic core,wherein the distance between a top surface of the magnetic pole tip layer and an under surface of magnetic pole tip layer in a rear end region away from an air bearing surface in a region connecting the magnetic pole tip layer to said upper magnetic core is shorter than the distance between the top surface of said magnetic pole tip layer in the air bearing surface and the under surface of magnetic pole tip layer, and said magnetic pole tip layer consists of three layers of a magnetic layer/magnetic gap layer/magnetic layer.