Bill,
There are many. You might try Ferro Corp., Hereaus, Electro-Science
Laboratories (ESL), DuPont.
Fred
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Brooks,Bill
Sent: Thursday, December 02, 2004 1:24 PM
To: [log in to unmask]
Subject: Re: [TN] Plating through a 2 layer board hole after assembly?
So in concept, I would be able to dab a cotton swab into a jar of this 'ink'
and coat the inside of the hole and maybe use a hot air gun to cure it? or
maybe something UV curable? Do you have some links to the manufacturers of
materials that do something like this? I'm sure if there was such a
material it could be used to repair traces and the like....
Bill Brooks - KG6VVP
PCB Design Engineer , C.I.D.+, C.I.I.
Tel: (760)597-1500 Ext 3772 Fax: (760)597-1510
e-mail:[log in to unmask]
http://www.dtwc.com <http://www.dtwc.com>
http://pcbwizards.com <http://pcbwizards.com>
-----Original Message-----
From: Lee parker [mailto:[log in to unmask]]
Sent: Thursday, December 02, 2004 9:54 AM
To: TechNet E-Mail Forum; Brooks,Bill
Subject: Re: [TN] Plating through a 2 layer board hole after assembly?
Bill
I would look at these, but there are others which have the constancy of ink
such as used in Hybrids that should do as well and will be far less trouble
to apply. To a large extent the application will probably dictate the
material.
Best regards
Lee
----- Original Message -----
From: Brooks,Bill <mailto:[log in to unmask]>
To: [log in to unmask] <mailto:[log in to unmask]>
Sent: Thursday, December 02, 2004 12:49 PM
Subject: Re: [TN] Plating through a 2 layer board hole after assembly?
Oh I think I see, much like the sliver loaded epoxy materials they use to
plug vias?
Bill Brooks - KG6VVP
PCB Design Engineer , C.I.D.+, C.I.I.
Tel: (760)597-1500 Ext 3772 Fax: (760)597-1510
e-mail:[log in to unmask]
http://www.dtwc.com <http://www.dtwc.com>
http://pcbwizards.com <http://pcbwizards.com>
-----Original Message-----
From: Dennis Fritz [mailto:[log in to unmask]]
Sent: Thursday, December 02, 2004 5:50 AM
To: [log in to unmask] <mailto:[log in to unmask]>
Subject: Re: [TN] Plating through a 2 layer board hole after assembly?
In a message dated 12/1/04 4:36:36 PM Central Standard Time,
[log in to unmask] <mailto:[log in to unmask]>
writes:
<< Selective electroless plating would be the ideal option but I don't think
anyone has invented it yet... >>
Electroless plating involves a sequence of at least five successive chemical
immersion steps. The amount of masking of the rest of the board would make
this impractical. Conductive ink is a distinct possiblity as a large number
of
"inexpensive" double sided boards are produced in the Far East with "Silver
Through Hole" paste in all the vias.
Denny Fritz
MacDermid, Inc.
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