Patent ID: 6136458
Filing Date: 2000-10-24
Classification: H01F,H01L,Y10T

Abstract:
A ferrite magnetic film structure exhibiting a magnetic anisotropy, said ferrite magnetic film structure comprising;a substrate provided on one main surface thereof with a groove-like recessed portion and with a ridge-like projected portion located neighboring to said groove-like recessed portion; anda ferrite magnetic film constituted by a continuous film having a substantially flat upper surface and formed on one main surface of the substrate;wherein said ferrite magnetic film structure meets the following conditions:(a/(a+b)) (h/(t-h)).gtoreq.0.0471.gtoreq.(a+b)where ""a"" is a width of said ridge-like projected portion; b is a width of said groove-like recessed portion; h is a height of step between said groove-like recessed portion and said ridge-like projected portion; t is a thickness of said ferrite magnetic film at the recessed portion; and 1 is a length of said recessed portion and of said projected portion.