Homebrew PCBs

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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