Patent ID: 7969148

Claim:
A magnetic sensor device comprising: “A”-phase magnetic resistance pattern and “B”-phase magnetic resistance pattern which are provided with a phase difference of 90° from each other; wherein the “A”-phase magnetic resistance pattern is provided with “+a” phase magnetic resistance pattern and “−a” phase magnetic resistance pattern with a phase difference of 180° from each other for detecting movement of a magnetic scale, and the “B”-phase magnetic resistance pattern is provided with “+b” phase magnetic resistance pattern and “-b” phase magnetic resistance pattern with a phase difference of 180° from each other for detecting movement of the magnetic scale, and wherein the “+a” phase magnetic resistance pattern, the “−a” phase magnetic resistance pattern, the “+b” phase magnetic resistance pattern and the “−b” phase magnetic resistance pattern are formed on a same face of one piece of board so that the “+a” phase magnetic resistance pattern and the “−a” phase magnetic resistance pattern are diagonally located and the “+b” phase magnetic resistance pattern and the “−b” phase magnetic resistance pattern are diagonally located.