Durable and multifunctional magnetic rotation sensor for rotary encoders

A durable and multifunctional general purpose magnetic rotation sensor was developed. A magnetoresistive effect element was selected as the sensing device because of its excellent capability. The sensing element is manufactured by the process similar to semiconducter´s. After studying about the manufacturing process, we established a reliable double layer wiring process, and realized a more complicated pattern design. The authors also studied the magnetic materials used for the rotating drum, and the magnetizing process. Thus, several series of standard sensors which are easy to use, multifunctional, and highly reliable were developed.