Asahi Kasei Electronics Co., Ltd.

Toshiaki Fukunaka

Atsushi Yamamoto

A ultrathin magnetoelectric transducer and its manufacturing method are provided which enable the quality of mounting to be inspected nondestructively, and can reduce a footprint. The magnetoelectric transducer has a substrate composed of a nonmagnetic substrate, and includes bottom surface connecting electrodes whose leads have a first thickness, and side electrodes which are exposed by dicing and have the first thickness. A more sensitive Hall element has a high-permeability magnetic substrate as the substrate, and includes the bottom surface connecting electrodes whose leads have the first thickness, and the side electrodes exposed by the dicing and having the first thickness. The bottom surface connecting electrodes of the leads with the first thickness are formed across the internal electrodes of adjacent magnetoelectric transducers with maintaining the first thickness. The side electrodes with the first thickness are formed by cutting the center between the adjacent magnetoelectric transducers.

Magnetoelectric transducer and its manufacturing method

The present invention provides a thin magnetoelectric transducer which has a projected size substantially equal to that of a pellet and which can be subjected to an inspection test nondestructively. The magnetoelectric transducer has a semiconductor device provided on the upper surface of a projecting portion of a projecting nonmagnetic insulating substrate and comprising a magnetosensitive section and inner electrodes made of metal. A conductive resin layer is formed on the internal electrodes and on part of the side surfaces of the projecting portion. A strain buffering layer is formed at least on the magnetosensitive section . Furthermore, at least the strain buffering layer on the magnetosensitive section is coated with a protective layer

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Nobeoka, Japan

Toshiaki Fukunaka