Rohm Co., Ltd.

Hiroshi Kaida

Shigeru Kambara

Masato Doi

A chip resistor is formed with an elongated resistor connecting a pair of electrodes on a substrate and grooves are formed on the surface of the resistor in a characteristic pattern having a longer branch and a shorter branch. The longer branch may be L-shaped, extending between a selected point on a side edge of the resistor and an end point which is nearer towards one of the electrodes. The shorter branch extends between another point on the side edge of the resistor and an intermediate point on the longer branch other than the end point. To form the grooves in such a pattern, the longer branch is formed first by laser-trimming from the side edge of the resistor to the end point. The laser is then switched off and is moved to the intermediate branching point along the branch of the groove just formed. The shorter branch is then formed by switching on the laser and moving it from the branching point to the other end.

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Kyoto, Japan

Hiroshi Kaida