Tdk Corporation

Ikuhito Onodera

Koji Kuroki

Makoto Kameno

Osamu Harakawa

To increase, in a magnetic sensor having a magnetoresistive strip and a ferromagnetic film, a magnetic bias to be applied to a magnetoresistive element by magnetically coupling the magnetoresistive strip and ferromagnetic film. A magnetic sensorincludes a magnetoresistive strip S, an insulating filmthat covers the magnetoresistive strip S, and ferromagnetic films Mand Mformed on the insulating filmand arranged in the x-direction through a magnetic gap G extending in the y-direction. The ferromagnetic films Mand Moverlap a plurality of hard magnetic members H through the insulating film. This allows two adjacent hard magnetic members H to be magnetically coupled through the ferromagnetic films Mand M. This makes it possible to increase the magnetic bias to be applied to a magnetoresistive element R without involving an increase in the size of the hard magnetic member H.

Magnetic sensor

Leading wires of an electrical circuit and a thin film magnetic head assembly are electrically connected with a conductive film. The leading wires are connected to an element pad and a circuit pad, respectively. An element bump is shared with the electrical circuit and the thin film magnetic assembly. Information of the processing degree of the thin film magnetic head assembly is electrically monitored via the element bump from a bonding pad which is electrically connected with the element bump.

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Tokyo, Japan

Ikuhito Onodera