Patent ID: 6236538
Filing Date: 2001-05-22
Classification: G11B,H01F

Abstract:
A magnetic structure comprising a substrate having a plurality of ridge-like projections, each of said projections having slant side surfaces, adjacent slant side surfaces which oppose each other defining opposed slant side surfaces, said plurality of projections including a first subset of long projections having a first length and a second subset of short projections having a second length shorter than said first length, said long and short projections being arranged in an alternating fashion with nearest neighboring short projections being separated from one another by a respective one of the long projections, a short projection and an adjacent long projection defining a groove-shape recess therebetween;a first plurality of parallel and conductive passages formed on opposed slant side surfaces of adjacent long and short projections;a first insulating layer stacked on said first plurality of conductive passages and said substrate;a magnetic core made of magnetic material enclosed in said recess;a second insulating layer stacked on said magnetic core; anda second plurality of conductive passages formed on said second insulating layer to sequentially connect ends of said first plurality of conductive passages to form a helical coil.