Switchable wavelength laser-based etched circuit board processing system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Oct 18, 2001
app pub date -
Dec 5, 2000
filing date -
Dec 7, 1999
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A wavelength switchable laser (10) of this invention is based on a solid-state laser source (12) in which a fourth harmonic UV laser beam (26) is ordinarily used for processing, and a second harmonic 'green' laser beam (28) is dumped and wasted. However, this invention uses the ordinarily wasted green laser beam for processing ECB (30) conductor layers (32, 36), which enhances processing throughout because of the higher power of the green energy than of the UV energy. A Pockel cell (16) effects laser beam polarization switching that causes either the green beam or the UV beam to be directed to the ECB for processing different materials. This invention requires only a single rail laser source and is, therefore, simple, cost effective, efficient, inherently aligned, and has high processing throughput.
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