PC coard exposure

[Frank Pickens]

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

 

[peterken]

"Frank Pickens" <frankpickens@verizon.net> wrote in message
news:h8dKd.1082$ck5.321@trnddc05...

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

 

[Ban]

Frank Pickens wrote:

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.
--
ciao Ban
Bordighera, Italy