Patent ID: 6920684
Filing Date: 2005-07-26
Classification: G01R,Y10T

Abstract:
1. An assembling method of a magnetic sensor, characterized by comprising the steps of: forming a plurality of magnetoresistive elements on the same substrate in such a manner that the magnetoresistive elements are arranged regularly; forming a plurality of connection pads at regular positions on the same substrate in such a manner that the connection pads are connected to terminals of the magnetoresistive elements; magnetizing, in the same magnetization direction, fixed layers of all the magnetoresistive elements that are formed on the same substrate; cutting out a plurality of chips each having a set of magnetoresistive elements and connection pads from the substrate; and combining a plurality of cut-out chips together with consideration given to the magnetization directions of the fixed layers of the magnetoresistive elements in the chips, wherein chips are cut out in such a manner that each chip includes at least two magnetoresistive elements and two sets of connection pads, wherein four chips are used in each of which at least two magnetoresistive elements are formed; and wherein bridge circuits that produce a multiple-phase output signal are formed by combining the four chips together in such a manner that the magnetization directions of the fixed layers of the magnetoresistive elements belonging to chips adjacent to each other deviate from each other by 90° in order in the same rotational direction and connecting, in series, magnetoresistive elements whose fixed layers are magnetized in opposite directions.