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making PCBs with solder resist layers

making PCBs with solder resist layers

2008-10-10 by trevwhite74

Hi all.

I am really interested in making some pcbs with solder resist. I have
looked on the megauk site and found the following products. Has anyone
used either/both?

Dry Film Solder Mask
http://www.megauk.com/dry_film_laminators.php

With the dry film I am wondering if i could get away with just a cheap
hot laminator like the ones you can buy from Maplin or does it need to
be more industrial?

520 Solder Resist Ink
http://www.megauk.com/screen_printing.php

This seems to be relatively straight forward. No doubt needs some
pactice with but looks very promising.

Thanks

Trev

making PCBs with solder resist layers

2008-10-10 by trevwhite74

Hi all.

I am really interested in making some pcbs with solder resist. I have
looked on the megauk site and found the following products. Has anyone
used either/both?

Dry Film Solder Mask
http://www.megauk.com/dry_film_laminators.php

With the dry film I am wondering if i could get away with just a cheap
hot laminator like the ones you can buy from Maplin or does it need to
be more industrial?

520 Solder Resist Ink
http://www.megauk.com/screen_printing.php

This seems to be relatively straight forward. No doubt needs some
pactice with but looks very promising.

Thanks

Trev

Re: [Homebrew_PCBs] making PCBs with solder resist layers

2008-10-10 by leon Heller

----- Original Message -----
From: "trevwhite74" <trevor.white100@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Friday, October 10, 2008 11:48 AM
Subject: [Homebrew_PCBs] making PCBs with solder resist layers


> Hi all.
>
> I am really interested in making some pcbs with solder resist. I have
> looked on the megauk site and found the following products. Has anyone
> used either/both?
>
> Dry Film Solder Mask
> http://www.megauk.com/dry_film_laminators.php
>
> With the dry film I am wondering if i could get away with just a cheap
> hot laminator like the ones you can buy from Maplin or does it need to
> be more industrial?
>
> 520 Solder Resist Ink
> http://www.megauk.com/screen_printing.php
>
> This seems to be relatively straight forward. No doubt needs some
> pactice with but looks very promising.

If you ask them nicely they might send you a sample. They did that when I
wanted to try their JetStar film.

Leon

Re: [Homebrew_PCBs] making PCBs with solder resist layers

2008-10-10 by Stefan Trethan

I think you can get away with a cheaper laminator setup.
The advantage of the film is you can photo-process it.

I do not know how much use a screenprinting ink would be for hobby use,
since typically only a few boards are made of each design.

There also seems to be photo-process liquid resist but i do not know how
they prevent it from filling the holes. You could drill after, but that is
not an option for a commercial setup with PTH.

I have had moderate results with using toner for soldermask, it may be
sufficient for your requirements.


ST

On Fri, Oct 10, 2008 at 12:48 PM, trevwhite74 <
trevor.white100@...> wrote:

Show quoted textHide quoted text
> Hi all.
>
> I am really interested in making some pcbs with solder resist. I have
> looked on the megauk site and found the following products. Has anyone
> used either/both?
>
> Dry Film Solder Mask
> http://www.megauk.com/dry_film_laminators.php
>
> With the dry film I am wondering if i could get away with just a cheap
> hot laminator like the ones you can buy from Maplin or does it need to
> be more industrial?
>
> 520 Solder Resist Ink
> http://www.megauk.com/screen_printing.php
>
> This seems to be relatively straight forward. No doubt needs some
> pactice with but looks very promising.
>
> Thanks
>
> Trev
>
>


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

Re: making PCBs with solder resist layers

2008-10-13 by trevwhite74

> There also seems to be photo-process liquid resist but i do not know how
> they prevent it from filling the holes. You could drill after, but
that is
Show quoted textHide quoted text
> not an option for a commercial setup with PTH.
>


I just thought about this. You mask the areas that you want to remove.
So all the pads are masked off. Then you expose it to UV. Then you
clean it and all the areas that were masked wash away. So all the
stuff in the holes will simply wash away as well. I think that is the
way it would work.

Trev

Re: [Homebrew_PCBs] Re: making PCBs with solder resist layers

2008-10-13 by Stefan Trethan

Possibly, it could well be how they do it.
But would the developer work through the tiny holes fast enough? You have
like 1.5mm of soldermask there after all.

Maybe it's soft enough, or they use a forceful spray developer, or both.

I don't see another way really. I do know they use a curtain-coating machine
(where the liquid soldermask is like a waterfall and the boards travel
underneath).

ST

On Mon, Oct 13, 2008 at 12:19 PM, trevwhite74 <
trevor.white100@...> wrote:

Show quoted textHide quoted text
>
> > There also seems to be photo-process liquid resist but i do not know how
> > they prevent it from filling the holes. You could drill after, but
> that is
> > not an option for a commercial setup with PTH.
> >
>
>
> I just thought about this. You mask the areas that you want to remove.
> So all the pads are masked off. Then you expose it to UV. Then you
> clean it and all the areas that were masked wash away. So all the
> stuff in the holes will simply wash away as well. I think that is the
> way it would work.
>
> Trev
>
>
> ------------------------------------
>
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
>
>
>
>


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