I hope you don't mean mercury arc lamps. They have the right wavelength (365 nm) for fast exposure, but they can cause serious eye damage. Try some of those 'black light' tubes. The exposure is longer, but they last a long time and they won't produce any eye damage.
----- Original Message -----
From: Terry Mickelson
To: Homebrew_PCBs@yahoogroups.com
Sent: Thursday, January 20, 2005 4:33 PM
Subject: [Homebrew_PCBs] UV lamps?
I'd like to build a UV box to do positive resist exposure. The
presensitized boards are 5 by 7 inches, so the box and lamps need not
be too large. Also not too hot as this box is only open on the bottom.
LED's are under consideration but so far a pre-made PC board to hold
400 or so is too expensive. The board is nothing more than etched
parallel lines with drilled holes every .1 inch. UV lamps are a second
choice but they tend to fade and burn out over time.
What are your recommendations?
Terry M
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