Our company  evaluated units from  some of these same companies, and had
the same concerns and questions.  The Colight 1530 really *does* deliver
40+ mW/cm at the wavelength we were interested in.. We took our UV
radiometer  (Dynachem model 500) to Minneapolis and measured. We were
also concerned about the possibility of the bulbs being overdriven, with
subsequent short life, but that has not been our experience.  We work 1
shift  and produce about 150 panels/day, using the 3kw setting for inner
layers and the 5kw setting for LPI.  We're on our second set of bulbs.
Regards,

Mike Matson
[log in to unmask]
(970) 498-3285

"Experience is what you get when you don't get what you want."
 ----------
From: [log in to unmask]
To: [log in to unmask]
Subject: (FAB) Fine Line Imaging
Date: Friday, November 01, 1996 5:46PM

      We are looking to purchase an additional exposure unit for use on
primary resist.
We do not intend at this time to purchase a collimated light source but
we
are still
interested in the ability to produce a sub 5 mil line and space.

      My question is this:

      of the 5K exposure units in our search: Colight, Byers, Orc and
Olec,
the light sources
and internal construction (ie. reflector sheilds ) appear to be very
similar.
 Are there any
major differences ?   Should I focus primarily on exposure plane
intensity ?
 If so, why
would unit A deliver 20 mw/cm2 and unit B deliver 40+ mw/cm2 when both
use
similar 5 K bulbs ? Are these actual intensities or marketing numbers?


      [log in to unmask]
      Nationwide Circuits Inc.

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