Stencil or stamp?

Hi all,

I have much experience in making printed circuit boards
using photoetching techniques. Recently I got 10 Kgs of
epoxy glass copper clad boards, double sided, from a
friend that quitted his electronics activity.

My past experiences with photoetching have been a great
success if I used already-photoresist-coated boards, and
a total failure when I tried to apply photoresist via a
spray on non photoresist-coated boards (like those 10 Kg
of epoxy glass I recently got).

So I wanted to use a different system for these uncoated
epoxy glass copper boards.

So far I'm imagining two possible solutions:

1) make stencils, and then spray a normal acid-resistant
varnish through its "holes".

2) make stamps, and apply them on the epoxy glass to put
a strate of ink where necessary (will it be thick enough?)

I need to produce really fine detail, like 0.2 mm lines
(surface mount devices), and these lines must not have any
breaks in them, because that would mean an electrical
connection break.

What would be the best path to follow, stencils or stamps?
I would prefer stamps, ideally.

And, then, what would be the best way to make such a high
resolution stamps or stencils?

Thanks!
Giovanni

You're in the wrong newsgroup; this one is devoted to artisans who work
with polymer clay. That being said, you might want to try Peel-n-Press
Blue Stencil Film. Here's a resource:
http://www.techniks.com/

All the best,
Katherine Dewey
http://www.elvenwork.com


wrote:

Hi all,

I have much experience in making printed circuit boards
using photoetching techniques. Recently I got 10 Kgs of
epoxy glass copper clad boards, double sided, from a
friend that quitted his electronics activity.

My past experiences with photoetching have been a great
success if I used already-photoresist-coated boards, and
a total failure when I tried to apply photoresist via a
spray on non photoresist-coated boards (like those 10 Kg
of epoxy glass I recently got).

So I wanted to use a different system for these uncoated
epoxy glass copper boards.

So far I'm imagining two possible solutions:

1) make stencils, and then spray a normal acid-resistant
varnish through its "holes".

2) make stamps, and apply them on the epoxy glass to put
a strate of ink where necessary (will it be thick enough?)

I need to produce really fine detail, like 0.2 mm lines
(surface mount devices), and these lines must not have any
breaks in them, because that would mean an electrical
connection break.

What would be the best path to follow, stencils or stamps?
I would prefer stamps, ideally.

And, then, what would be the best way to make such a high
resolution stamps or stencils?

Thanks!
Giovanni

On Sat, 06 Dec 2003 14:50:40 GMT, Katherine Dewey
wrote:

You're in the wrong newsgroup; this one is devoted to artisans who work
with polymer clay. That being said, you might want to try Peel-n-Press
Blue Stencil Film. Here's a resource:
http://www.techniks.com/

I'll second this [sorry for more OT stuff]. It's great stuff for high
quality prototypes and one-offs. Pain in the neck to do multiples
unless you buy the laminator designed for it [paper laminators are not
hot enough]. It can also be used for quite a few other things. The
only problem is finding something to print on it with. Laser printer
is better. Photocopiers are a hit-or-miss as far as being able to run
it through without melting it.

It's also great stuff for creating detailed texture plates and stencils
for use with polymer clay. Judy Kuskin's work is an example.

Katherine Dewey
http://www.elvenwork.com


"Xane 'MegaWolf' T." wrote:

On Sat, 06 Dec 2003 14:50:40 GMT, Katherine Dewey
wrote:

You're in the wrong newsgroup; this one is devoted to artisans who work
with polymer clay. That being said, you might want to try Peel-n-Press
Blue Stencil Film. Here's a resource:
http://www.techniks.com/

I'll second this [sorry for more OT stuff]. It's great stuff for high
quality prototypes and one-offs. Pain in the neck to do multiples
unless you buy the laminator designed for it [paper laminators are not
hot enough]. It can also be used for quite a few other things. The
only problem is finding something to print on it with. Laser printer
is better. Photocopiers are a hit-or-miss as far as being able to run
it through without melting it.

Try these groups instead:

I believe the newsgroup for scientific polymer discussions is
rec.sci.polymer or something similar.

http://www.plasticsusa.com/ (Forums)
http://www.4spe.org/myspe/students/studentchapters.htm
http://plastics.about.com/cs/assocplastics/index.htm
http://directory.google.com/Top/Science/Chemistry/
http://directory.google.com/Top/Scie...olymers/?tc=1/

YAHOO groups
.... (137 groups for scientific polymer groups, as well as clay polymer groups)
http://groups.yahoo.com/search?query=polymer
.....Emulsion Polymers (scientific uses of polymer, not clay) "we have a group
about emulsion polymer . i have created this group because water based polymers
is better than solvent born and without damage to environment . please see this
group at http://groups.yahoo.com/group/emulsionpolymers/ and join for
conversation.

Diane B.
http://glassattic.com --polymer clay "encyclopedia"
. . . . . . . . . . . . . (don't use AOL address
!!!!!!!)