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PC coard exposure

F

Frank Pickens

Jan 1, 1970
0
I have several PC boards that that are coated with a POSITIVE resist. I
cannot afford an ultraviolet light to expose these boards with. Can I
expose them with sunlight and if so can anyone suggest an approximate
exposure time by sunlight
Thanks
fp
 
P

peterken

Jan 1, 1970
0
Frank Pickens said:
I have several PC boards that that are coated with a POSITIVE resist. I
cannot afford an ultraviolet light to expose these boards with. Can I
expose them with sunlight and if so can anyone suggest an approximate
exposure time by sunlight
Thanks
fp

No need for "special" pre-assembled UV lights,
just go get one or two fluorescent lamps with an UV component (eg in the
TLD18-series)
and yes, direct sunlight IS usable but rather unstable in needed exposure
time
 
B

Ban

Jan 1, 1970
0
Frank said:
I have several PC boards that that are coated with a POSITIVE resist.
I cannot afford an ultraviolet light to expose these boards with. Can
I expose them with sunlight and if so can anyone suggest an
approximate exposure time by sunlight
Thanks
fp

I used to do that ages ago, 20min.
 
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