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NNTP-Posting-Date: Wed, 25 Dec 2002 18:25:45 -0600
Subject: What light effects photo resist?
Date: Wed, 25 Dec 2002 19:06:00 -0500
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I want to use a laser to develop a board. I want to do this so that I can
make small yet accurate lines on pcb. I'm not sure what wave lengths photo
resist is sensitive to though. I've read that it is sensitive to uv and
another website said that certain uv doesn't penetrate all the way through
thick photoresist. It also said that a wavelength of 365nm is just right or
I was planning on using wavelengths between 320mn and 400 which is UV-a .
if I use other types of uv I may have to be more careful about exposure.
the reason I need to know this is because each laser has a specific
output wavelength or wavelengths.
so what wavelength should I use?
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