Importance

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Abstract

The subject is an apparatus for consecutively marking a plurality of packaged semiconductor devices such as ICs by using a laser beam marker. A plurality of packaged semiconductor devices are put into a tubular holder so as to form a single file. The tubular holder is generally rectangular in cross-sectional shape and has a lengthwise opening in the upside wall. The tubular holder is placed on a conveyor belt and secured to the conveyor belt by guide belts each of which makes tight contact with the upside wall or one of the side walls of the tubular holder and advances in the same direction as the conveyor belt. On the conveyor belt the tubular holder passes a marking station where a laser beam is projected on the semiconductor devices in the holder one after another. The apparatus includes a computarized controller to automatically control the positions of the conveyor belt and the guide belts according to the width and height of the tubular holder. In changing the object of marking to another kind of semiconductor device there arises a change in the width and/or height of the tubular holder, but the positions of the conveyor belt and the guide belts can quickly be adjusted by the function of the controller.

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First Claim