Patent ID: 6426620
Filing Date: 2002-07-30
Classification: G01R

Abstract:
A magnetic field sensing element comprising:an underlayer formed on a substrate; a giant magnetoresistance element for detecting a change in a magnetic field; an integrated circuit formed on said underlayer for carrying out predetermined arithmetic processing based on a change in a magnetic field detected by said giant magnetoresistance element; a first wiring for connecting said giant magnetoresistance element and said integrated circuit, said first wiring formed on said underlayer from a metal film for forming said integrated circuit which is not in a region for forming said integrated circuit; and a first level difference buffer layer formed on said underlayer in a region for forming said giant magnetoresistance element to decrease a difference in the levels between the surface of said first wiring and a surface for forming said giant magnetoresistance element, wherein said giant magnetoresistance element is formed on said first level difference buffer layer.