pcb's

[Matt Haines]

>I've used conventional overhead transparencies for laser printers and
>photocopiers, the ones I've used were made by Xerox. I have found
>that it's important to clean the pcb well, it's best to put it into
>FeCl for 10 seconds before ironing. I have to fix some tracks with
>Sharpie, too. I think the slowest laser printers are better when
>printing on transparencies (or other TTS sheets).

Oh yeah! I forgot about the cleaning thing. I was having problems with the
edges of PCBs for awhile. It turned out that since I was handling things by
the edges, the oil from my fingers was enough to screw things up. So now I
clean the thing whilst wearing rubber gloves, and handle it that way until
I'm finished. I've been cleaning with isopropyl alcohol (the strong stuff,
like 90-99%).

Now let me get this straight...you can use regular ol' *transparencies*??!
When I was looking at the TecFilm 200 stuff, I thought it didn't look much
different than a regular transparency. And the advantage is that you can
clean off mistakes with acetone (although you've got to cut them to fit
boards smaller than 8.5x11", so it's not exactly recyclable).
Transparencies are a darn sight cheaper than these fancy transfer things.
Even at the copy store they're only a dollar each.


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Matt Haines  haines at apc.net         .       .       .       .
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Aliens suck.