Patent ID: 6335050
Filing Date: 2002-01-01
Classification: H01F,H01L,Y10T

Abstract:
A method of manufacturing a ferrite magnetic film structure exhibiting a magnetic anisotropy, the method comprising:forming a groove-like recessed portion and a ridge-like projected portion, each having a substantially rectangular cross section, on one main surface of an insulating substrate; forming a ferrite paste layer by coating a paste containing a ferrite powder on the one main surface; and baking the ferrite paste to form the ferrite magnetic film structure, which includes a ferrite magnetic film constituted by a continuous film having a substantially flat upper surface and having an in-plane magnetic anisotropy, wherein the ferrite magnetic film structure meets the following conditions: (a/(a+b))(h/(tâˆ’h))&gE;0.047 1&gE;(a+b), wherea is a width of the ridge-like projected portion; b is a width of the groove-like recessed portion; h is a height of a step between the groove-like recessed portion and the ridge-like projected portion; t is a thickness of the ferrite magnetic film at the recessed portion; and l is a length of the recessed portion and of the projected portion.