Mori Seiki Co., Ltd.

Nobuhiro Nakagawa

Masaaki Kusumi

Gunichi Nakamura

Disclosed herein is a position sensor including, a magnetic recording medium including two incremental layers and an absolute layer, the absolute layer provided between the incremental layers, each of the layers having magnetic information recorded therein, and a magnetic detection section including three magnetoresistance effect devices opposite to the layers of the magnetic recording medium, being moved relative to the magnetic recording medium in the extending direction of the layers, and being operative to detect the magnetic information in the layers by the magnetoresistance effect devices.

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Tokyo, Japan

Nobuhiro Nakagawa