Patent ID: 7688066
Filing Date: 2010-03-30
Classification: G01D,H05K,Y02P

Abstract:
1. A rotation detector comprising: a magnet configured to form a magnetic field between the magnet and a rotary member; a magnetism detection element positioned in the proximity of the magnet to detect a variation in the magnetic field generated by a rotation of the rotary member; and a signal processing circuit configured to perform a signal processing for a signal from the magnetism detection element, the signal processing circuit being sealed and coated with a resin; wherein the signal processing circuit includes a part mounted on a surface electrode; wherein an adjoining region adjacent to an electrode forming region on which the surface electrode is installed is formed to be lower than the electrode forming region and formed as a recess from one end surface of the surface electrode toward a main body portion of a casing and the resin is filled within the adjoining region.