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Resistance laser cutting

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#50181

Resistance laser cutting | 11 May, 2007

Hi everybody,

Please could anyone shed any light on the subject: resistance laser cutting with flux- calibration of LEDs during electronic assembly phase. Should special equipments be used? What is exactly the process?

Thanks and Regards,

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Rob

#50190

Resistance laser cutting | 11 May, 2007

Hi Lupo,

Are you talking about laser trimming the current limiting resistors in front of the LEDs, whilst dynamically measuring their output to get set light levels?

If so then you need a laser trimmer & a very good photodiode/comparator feedback loop.

It's been about 10 years since I was last involved in laser trimming of caps and resistors so I wouldn't like to recommend any suppliers of equipment.

I hope that helps,

Cheers,

Rob.

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