Here are a few links concerning the subject of direct printing on copper
....
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http://www.smh.com.au/articles/2003...l?oneclick=true Article on conductive
inks and their applications.
http://homepage.tinet.ie/~ei9gq/pcb.html How to make PCB's using toner
transfer, using UK available paper.
http://americanprinter.com/mag/prin...introducing_uv/ Article on UV inks.
http://www.capv.com/home/CAPStats/C...03/3.30.04.html Article on UV cure
Inks giving 0.2 second cure time and advantages over solvent inks.
http://www.signindustry.com/outdoor...5-JL_UVpt2.php3 Article on UV cured
inks.
http://members.whattheythink.com/al...le.cfm?id=17518 Article on commercial
UV cured inks.
http://www.oce.com/en/News/Newsbull...izonaT220UV.htm Commercial article on
UV cured ink.
http://www.oce.com/en/News/Newsbull...izonaT220UV.htm UV inks and machine
development
http://www.screenweb.com/inks/cont/UVCuring.html Mysteries and myths of UV
cured inks.
http://my.ecplaza.net/cnkcho/2.asp Small commercial thick material flatbed
printer showing table height mechanism.
http://www.circuitree.com/CDA/Artic...,121582,00.html Article on the
application of Jetink printing of PCB's and limitations.
http://www.xaar.co.uk/ One of the leaders in this field. Printheads, Ink
etc. A company to watch.
----- Original Message -----
From: "Stefan Trethan" <stefan_trethan@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Saturday, May 07, 2005 8:20 PM
Subject: Re: [Homebrew_PCBs] INkejet printing right on a circuit board....
> Please do keep us informed if you find a suitable UV curing ink.
> I agree it seems the most promising.
>
> I would not mind putting the "wet" pcb under UV lamps for curing.
>
> ST
>
>
>
> On Sat, 7 May 2005 20:14:39 +0100, John Kent <moonshadow@...>
> wrote:
>
>> Thank you for the reply, I found it very interesting. As you say part of
>> the answer is in cleaning or preparing the copper surface but most of my
>> problems lay with the ink. I got in contact with many ink manufacturers
>> and
>> we had some rewarding discussions about this application. It basically
>> boils down to the choice between a solvent based ink or an UV cured ink.
>> The
>> water solvent based inks I have tried so far, simply wash off in the acid
>> bath. There can also be a problem with the solvent vaopurising and
>> cloggung
>> the head. I came to the conclusion that a UV cured ink may be a possible
>> all
>> round solution. These are actually resin based and offer a much more
>> durable
>> printed image. UV inks are available that will cure in a fraction of a
>> second. So it might be possible to mount a fibre bundle from a UV light
>> source to just behind the print nozzles as a low mass light cure source.
>> Taking the idea one step further, it would also be possible
>> to
>> print, graphics, flux as well as acid resist direct onto the board. This
>> leads us onto conductive inks, which already exist. They normally
>> require
>> special for purpose heads, but seem to work well for most low power
>> applications. I think for my own purposes a simple A5 flat bed printer,
>> using UV cured ink would do the trick. Another advantage of UV ink is
>> that
>> it does not dry in the nozzles as solvent ink does. I have seen
>> applications
>> where multilayer boards have been produced using UV inks, with an
>> insulating
>> ink between layers ... and all of this printed on a flexible substrata.
>> Anyway who says we have to have a purpose substrata since we can print
>> onto
>> anything!
>> It is possible to convert the older models of Cannon
>> printers
>> into flat bed, I have one on the bench at the moment. Thanks again for
>> the
>> reply. .
>> John.
>> ----- Original Message -----
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