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Does more UV light result in less Photoresist exposure time?
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1
Nov 22.2019, 17:55:18
I'm setting up a photoresist light box using a LED matrix. I could lay the LED strips such that the LEDs are each evenly spaced on x,y axis...
but then got to thinking... why not just pack 'em in there?
I figure if I am using a Fresnel lens, I will get even coverage (collimation champion), and can probably even do boards that get pretty close to the edge.
But anyway, will more light reduce the needed exposure time?
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A****min
Nov 28.2019, 09:11:30
Yes, it will. Commercial PCB production often uses high powered arc lamps for very fast exposure. The wavelength matters too, make sure the wavelength from the LEDs you use is close to what the resist is intended for.
