Ron,
Let me know if you need help with laminated panels. I have a dry film
laminator and use a resist similar to the DuPont material. The resist
I use is called ETERTEC HQ6015. It is 1.5 mils thick and processes
the same as the DuPont 4015 we used in the past. Exposure time is 17
seconds when using a Colight DMVL-930 exposure unit with 1.5 Kw lamps.
Development is in 1% sodium carbonate. Resist stripping uses a weak
sodium hydroxide solution heated to about 120 degress F. This resist
can be stripped at room temperature with longer process times.
I can supply single or double sided panels laminated with this resist
and sealed in opaque black poly bags. Contact me off list with your
requirements if you are interested in these materials.
Tom
--- In
Homebrew_PCBs@yahoogroups.com, "Ron Amundson"
<ron_amundson@h...> wrote:
> Since Kepro went out of business, I need to find a new supplier of
> presensized negative acting photoresist material . I tried some
positive
> material from Injectorall, but can't seem to get a decent board
from it. I'm
> sure it will work after I figure out the correct process, but that
can get
> pretty expensive.
>
> Ideally I'd like to find some place that provides the same type of
material
> as Kepro had. It was a 1.3mil thick laminated negative acting
photoresist,
> Riston EM312 Photopolymer film made by Dupont. It was developed
with sodium
> carbonate.
>
> Any ideas
> Ron