Re: PCB photo etch using inkjet?


"Abstract Dissonance" <Abstract.Dissonance.hotmail.com> wrote in message
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"Steve Butler" <ksbutler@xxxxxxxxxxxx> wrote in message
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ink doesnt dry quick enough consequently it runs or smudges edges
I have done a board or two printing artwork to plain paper and
exposing for a minute or so in sunlight , worked well but now
use Laser printer and transparencies for development

Steve


"Tom Biasi" <tombiasi@xxxxxxxxxxxxxxxxxxx> wrote in message
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If you're talking about the photographic process where a
sensitized board is exposed to light with the artwork on
a transparancy, then the inkjets typically don't get dark
enough for fine line work. Laser toner is much more opaque
than any of the inkjet inks I've seen so far.

JazzMan
--

Also there are methods that rely on the fusing of the toner to the
board. Ex. PNP Blue.




I tried printing the traces on a transparency with my inkjet and it turned
out almost perfect. There were no smudges or anything and it looks pretty
dark(it has a green hue to it though and I'm not sure if my printer is
using the black ink completely or not.) I'd say its 99% perfect as far as
the traces are concerned. There is a little "streak" about 1 mm long
through one of the traces but that is easily fixed. I will go ahead and
try it and see what happens. Hopefully the ink is thick enough to block
the UV light. I might post my results if they are decent.

Jon


So far so good. I was able to get the layout on perfectly. I could not place
a "weight" on the transparency since the ink would not try. I have to cut
the board to size and etch it. I was able to get about .008 trace width.
Don't know for sure since I didn't use any traces smaller than 0.040 but
my - sign's have a smaller than 0.01in so I guess its about 0.008.

So I guess everything is ok now. The etching should be routine(well gotta
figure out the proper time). The next hurdle will be the drilling.

Jon


.

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