Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Hi Folks,
I'm mostly a learning lurker on these tech exchange lists, but the
recent UV source discussion has stimulated a question I've been
wondering about. I need a really compact UV source for a very portable
exposure unit. Anyone know of any success using an array of UV LEDs
as a UV light source for exposures? LEDs are pretty directional, so
are fairly well collimated as is. And in their visible light forms,
bright enough to use in traffic lights. But can these UV LEDs put out
enough light energy to react the photoresist? Anybody have experience
or know?

-Karl in Kalifornia