Mitsumi Electric Company Ltd.

Koichi Hosoya

Satoshi Ajiki

Hiroaki Tobitsuka

Yasuhiko Shinjo

Tsuyoshi Ishii

A plurality of magnetoresistive heads are arranged on a wafer substrate. A plurality of electrode pads are arranged on the wafer substrate in a first direction. Each electrode pad is connected to an associated magnetoresistive head. Respective adjacent electrode pads are shifted from each other in a second direction perpendicular to the first direction. The shifted amount of the adjacent pads in the second direction is larger than a dimension of the electrode pad in the second direction.

Multi-channel magnetoresistive head device

A plurality of magnetic head elements, each having a terminal portion, are arranged on a first face of the head chip. A wiring board member is electrically connected to the respective terminal portions of the magnetic head elements. A pair of side chips sandwich the head chip from both sides of the first face. Each of the side chips has faces forming a recessed portion which faces with at least the terminal portions of the magnetic head elements.

Magnetic head unit

In a magnetoresistive head, a first non-magnetic layer is formed on a first shield layer. A magnetoresistive element includes a magnetoresistive film and an electrode portion both formed on the first non-magnetic layer. A second non-magnetic layer is formed on the magnetoresistive element. A second shield layer is formed on the second non-magnetic layer. A non-magnetic metal layer electrically connects the first and the second shield layers. A first earth member is electrically connected to the electrode portion of the magnetoresistive element. A second earth member is electrically connected to the first and the second shield layers. A third earth member is electrically connected to the first earth member and the second earth member.

Magnetoresistive head including earth members

A pattern of lead terminals is formed on a side face of a head body provided with reproduction magnetic heads each being formed with a magnetic gap for reproducing at least an information signal, etc., recorded on a magnetic recording medium, and a preamplifier for amplifying reproduction output detected by the magnetic gap via the lead terminal is mounted directly on the side face of the head body

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Yamagata, Japan

Koichi Hosoya