Japan Science and Technology Agency

Tianma Japan, Ltd.

Akita Prefecture

Shingo Takahashi

Kiyoshi Yamakawa

Ken Sumiyoshi

Koji Shigemura

Satoshi Miura

Nobuya Seko

Hidetaka Yamada

Haruki Yamane

Koki Takahashi

Kazuyuki Ise

An optical detection type chemical sensor includes a light source, a detection element and a photodetector. The detection element is constituted of a laminate in which a multilayer film including a chemical detection layer, an optical interference layer, and a half mirror layer is formed on a transparent substrate. At least one of the layers includes a magnetic material. Light from the light source is applied to the detection element under the condition that the light enters inside of the detection element from the rear surface of the transparent substrate on which the laminate is not formed and multiple reflection occurring in the laminate intensifies the magneto-optical effect. A subject is detected by using the photodetector to detect a magneto-optical signal indicating a change in reflected light from the laminate resulting from a change in an optical property resulting from a reaction in the chemical detection layer.

Optical detection type chemical sensor

A magnetic head has an opposite face opposite to a magnetic disk, a main pole having a distal end face and an inclined face exposed to the opposite face, and a shield yoke extended substantially facing the opposite face. An end face on which the shield yoke is opposite to the main pole via a gap is inclined substantially in parallel to the inclined face of the main pole.

Thin film magnetic head and method for manufacturing the same

Growing community of inventors

Akita, Japan

Shingo Takahashi