Homebrew_PCBs

What's the easiest way to photosensitize copper boards and get high quality
results? I'm making double sided boards with traces down to 10 mils.

Laminate photoresist film? Applying some liquid/spray solution?

Can anyone suggest sources or product names? I'm in Canada, but any
suggestions would be appreciated.

Thanks.

- Chris Graham

spraying will work.
also if the laquer is sold in bottles (not pressurized) spraying gives uniform layer.

if making small quantities use pressurized cans sold to use as they are.

be aware of dust, keep for drying in box to prevent dust from settling down. maybe put in box and spray
in there, then put lid on.

have no idea how the film works.

regards
st



11.05.2003 19:53:43, Chris Graham <Chrisgr@...> wrote:

>What's the easiest way to photosensitize copper boards and get high quality
>results? I'm making double sided boards with traces down to 10 mils.
>
>Laminate photoresist film? Applying some liquid/spray solution?
>
>Can anyone suggest sources or product names? I'm in Canada, but any
>suggestions would be appreciated.
>
>Thanks.
>
>- Chris Graham
>
>
>
>
>Be sure to visit the group home and check for new Bookmarks and files:
>http://groups.yahoo.com/group/Homebrew_PCBs
>
>To unsubscribe from this group, send an email to:
>Homebrew_PCBs-unsubscribe@yahoogroups.com
>
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>

Chris,
I do not know of a supplier in Canada, but this link -->
http://www.web-tronics.com/printed-circuit-board-supplies.html has
inexpensive pre-sensitized positive photo etch boards. Using a black light
will do a good job on these and you do not need a dark room. These can
withstand a little time in a room with the lights on with no damage. The
developer used is Anhydrous Sodium Metasilicate. They sell it as their part
number posdev.
There are probably other very good sources, but I see no one has answered
your question as yet. Hope this gives you a start in your search.
-Mike

----- Original Message -----
From: "Chris Graham" <Chrisgr@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Sunday, May 11, 2003 10:53 AM
Subject: [Homebrew_PCBs] Photosensitizing boards


> What's the easiest way to photosensitize copper boards and get high
quality
> results? I'm making double sided boards with traces down to 10 mils.
>
> Laminate photoresist film? Applying some liquid/spray solution?
>
> Can anyone suggest sources or product names? I'm in Canada, but any
> suggestions would be appreciated.
>
> Thanks.
>
> - Chris Graham
>
>
>
>
> Be sure to visit the group home and check for new Bookmarks and files:
> http://groups.yahoo.com/group/Homebrew_PCBs
>
> To unsubscribe from this group, send an email to:
> Homebrew_PCBs-unsubscribe@yahoogroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>

They charge $13.75 for a 6"x9" double sided.
http://www.web-tronics.com/6x9presdoubs.html

I've used Ocean State for many years They charge $9.50 for the same
thing !
http://www.oselectronics.com/ose_p78.htm

Best Regards
Hans Wedemeyer

Mike Putnam wrote:

> Chris,
> I do not know of a supplier in Canada, but this link -->
> http://www.web-tronics.com/printed-circuit-board-supplies.html has
> inexpensive pre-sensitized positive photo etch boards. Using a black
> light
> will do a good job on these and you do not need a dark room. These can
>
> withstand a little time in a room with the lights on with no damage.
> The
> developer used is Anhydrous Sodium Metasilicate. They sell it as their
> part
> number posdev.
> There are probably other very good sources, but I see no one has
> answered
> your question as yet. Hope this gives you a start in your search.
> -Mike
>
> ----- Original Message -----
> From: "Chris Graham" <Chrisgr@...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Sunday, May 11, 2003 10:53 AM
> Subject: [Homebrew_PCBs] Photosensitizing boards
>
>
> > What's the easiest way to photosensitize copper boards and get high
> quality
> > results? I'm making double sided boards with traces down to 10
> mils.
> >
> > Laminate photoresist film? Applying some liquid/spray solution?
> >
> > Can anyone suggest sources or product names? I'm in Canada, but
> any
> > suggestions would be appreciated.
> >
> > Thanks.
> >
> > - Chris Graham
> >
> >
> >
> >
> > Be sure to visit the group home and check for new Bookmarks and
> files:
> > http://groups.yahoo.com/group/Homebrew_PCBs
> >
> > To unsubscribe from this group, send an email to:
> > Homebrew_PCBs-unsubscribe@yahoogroups.com
> >
> >
> >
> > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> >
>
>
>
> Yahoo! Groups Sponsor

ADVERTISEMENT

>
> Be sure to visit the group home and check for new Bookmarks and files:
>
> http://groups.yahoo.com/group/Homebrew_PCBs
>
> To unsubscribe from this group, send an email to:
> Homebrew_PCBs-unsubscribe@yahoogroups.com
>
>
>
> Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.

[Non-text portions of this message have been removed]