Method of efficiently laser marking singulated semiconductor devices
First Claim
Patent Images
1. A method for marking a surface of a singulated article, comprising:
- positioning at least one article at a first marking location to be marked by a laser beam;
marking said at least one article at said first marking location while positioning at least a second article at a second marking location; and
marking said at least a second article at said second marking location while removing said at least one marked article from said first marking location and positioning at least a third unmarked article at said first marking location.
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Abstract
A laser marking apparatus and method for marking the surface of a singulated article such as a semiconductor chip are described herein. Semiconductor chips are fed along inclined, parallel tracks to a laser marking field where they are subsequently marked by a laser beam. As the laser beam is marking chips associated with one track, chips associated with other tracks that have already been marked are replaced by unmarked chips. In this manner, the laser is continually being used to mark semiconductor chips without having to wait for unmarked chips to move to the marking location.
75 Citations
15 Claims
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1. A method for marking a surface of a singulated article, comprising:
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positioning at least one article at a first marking location to be marked by a laser beam; marking said at least one article at said first marking location while positioning at least a second article at a second marking location; and marking said at least a second article at said second marking location while removing said at least one marked article from said first marking location and positioning at least a third unmarked article at said first marking location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification