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. *************************************************************************** * TechNet mail list is provided as a service by IPC using SmartList v3.05 * *************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ***************************************************************************