Bill
You might want to look into conductive inks. It would probably require
some process development. Some curing would also be involved. Several
suppliers have these products on the market.
Best regards
Lee
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Brooks,Bill
Sent: Tuesday, November 30, 2004 7:08 PM
To: [log in to unmask]
Subject: [TN] Plating through a 2 layer board hole after assembly?
Don't laugh... I have been asked to find out if we can plate thru a 2
layer
board hole top to bottom after the board has been assembled... Is this
possible? If so how? And who would do it?
Other alternatives to get connectivity from the top to the bottom side
of an
already assembled board?
Z-wires? Eyelets? Any other ideas?
The non-plated hole is .156 diameter and the thickness of the board is
063
FR4 glass/epoxy material 2oz copper both sides.
Thanks in advance..
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://pcbwizards.com
-----Original Message-----
From: R Sedlak [mailto:[log in to unmask]]
Sent: Tuesday, November 30, 2004 3:31 PM
To: [log in to unmask]
Subject: Re: [TN] Immersion White Tin Plating Specification
Before we go off writing specifcations that make the fabrications people
spit and swear, I want to remind all that all immersion plating is
self-limiting, and when all the substrate is covered, you stop plating,
no
matter what temperature, or how long you leave it in the plating bath...
Most fabricators have trouble getting 50 microinches of Tin, and 40 is
pretty much the standard...
30 is pretty considered pretty thin..
And, no flat finishes are going to perform as well as HASL, if only
because
of thickness, nevermind superiority of alloy...
Rudy Sedlak
RD Chemical Company
---------------------------------
Do you Yahoo!?
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask]
or
847-615-7100 ext.2815
-----------------------------------------------------
All your favorites on one personal page - Try My Yahoo!
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text
in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at:
http://listserv.ipc.org/archives
Please visit IPC web site
http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
