Horizontal magnetic head with hall effect and its embodiment method

Claim 1

A magnetic head comprising: a semiconductive substrate with a recess engraved therein, said recess having a bottom; a first polar piece formed on said bottom of said recess, said first polar piece having first and second extremities; a first magnetic pillar including a first half formed on said first extremity of said first polar piece and a second half located above said first half; a second magnetic pillar including a first half formed on said second extremity of said first polar piece and a second half located above said first half; a gap formed between the first and second halves of at least one of said first and second magnetic pillars; a HALL effect sensor located in said gap; a plurality of conductive blocks spaced around at least one of said first and second magnetic pillars and connected to said HALL effect sensor; a second polar piece having a first section in contact with said second half of said first magnetic pillar and a second section in contact with said second half of said second magnetic pillar; a non-magnetic spacer between said first and second sections of said second polar piece; openings pierced through said insulating substrate for access to said conductive blocks; and electrical connections within said openings for electrically connecting to said HALL effect sensor.