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Chip Makers Weigh Benefits and Costs of Laser Marking Systems

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Michael D. Wheeler, News Editor

In the fledgling days of the semiconductor industry, chip makers encoded serial numbers and dates on integrated circuit packages using conventional pad printed or ink-jet techniques. These methods offered users a high-contrast mark at a relatively affordable cost, but they also resulted in fumes, occasional smudging and the tedious task of refilling vast ink reservoirs. As incidents of counterfeit chips surfaced, so did concerns over ink's permanence. This spurred the industry to look for alternatives, and by the early 1980s the photonics sector took its cue and rolled out the first laser...Read full article

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    Published: December 1998
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