Homebrew PCBs

"storan4wd" <bob.balderson@...> writes:
> I usually make PCBs with Riston dry film and artwork from an Epson D92
> inkjet.
>
> Unfortunately, the inkjet can't cope with 0.5mm LQFP (edges are too
> ragged especially on diagonals + there's too much sputtering at high
> resolution 2400dpi or more and it won't print with black ink only at
> high resolution so opacity is not satisfactory).

I use an epson R280 printer (claria inks) and found that the regular
software just can't print decent films.  So I wrote my own.  I do 2880
dpi prints in solid black on Jetstar film.

> The only downside is the transparency film; both types of laser OHP
> film I've tried (Clarkes Stationers "el cheapo own brand" and Black
> Diamond 100micron Laser/Copier OHP Film) both buckle more than I would
> have expected making contact exposure unhappy.

Are you using a vacuum of some sort to hold it flat?