Patent ID: 7414398
Filing Date: 2008-08-19
Classification: G01R

Abstract:
1. A magnetic detection device comprising: a magnetic detection element with a multi-layered film structure in which an electric resistance varies with an external magnetic field using a magneto-resistance effect; and a detection circuit detecting a variation in electric resistance of the magnetic detection element, wherein an active element and an interconnection layer included in the detection circuit are disposed on a substrate, at least a portion on the surface of an insulating layer covering the active element and the interconnection layer is planarized into a flat surface, and the magnetic detection element is disposed on the flat surface, and wherein the interconnection layer on the substrate and the magnetic detection element on the insulating layer are electrically connected to each other, wherein an electrode layer of the magnetic detection element or a lead layer extending from the electrode layer that is disposed on the flat surface is disposed above the interconnection layer, the electrode layer or the lead layer and the interconnection layer, which are disposed above and below each other, are electrically connected to each other.