15 Dec
2009
15 Dec
'09
12:35 a.m.
Geoffrey Reed wrote:
Hey! I'm looking at doing some single sided pcb's. From what I can tell, if
I want the pre-sensitized board to expose in a reasonable amount of time, I
am going to need to make a UV box to expose it with. I could apparently use
a regular fluorescent bulb but it will take 30-50 minutes to be ready for
developing.... And with cats, dogs and teenagers (and a friends 3 year old
many days) that is way too long to assume something is going to be left
without being bumped or knocked over :)
So, anyone have a good source for UV bulbs between 350 and 440 nm ? At a
reasonable price?
More in the vein of humour than helpfulness, and I don't know about the tech
specs and how photo-resists may have changed, but in the 70's I used my Mom's
otherwise-neglected UV sun-tanning lamp for this purpose. I think it was on the
order of a few minutes exposure time, but that's a pretty vague recollection.