Hi Ioan!

We used to have a board shop right across the street where I could go and get some mask, but alas they closed the doors a couple of years ago after being in business over thirty years.

But we use now to repair soldermask is a loctite two-part epoxy mixed with coloring agents to match the mask on the board.

The epoxy is: 

http://tds.loctite.com/tds5/docs/HYSA0151-EN.PDF

And the coloring agents can be had here:

http://www.circuitmedic.com/products/115-9000.shtml

We also use the epoxy for minor base board repair and gluing pads down. I like the -0151 because it doesn't wick all over the place while curing and stays pretty much where you put it. One thing about the coloring agents if you haven't used them before, is a little goes a L-O-N-G way! It doesn't take much at all to get the shade of color you need.

Steve

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ioan Tempea
Sent: Friday, February 20, 2009 7:47 AM
To: [log in to unmask]
Subject: [TN] Repair soldermask

Hello Technos,
 
What kind of soldermask do you use for repair jobs under BGAs? You know, the original SM goes away when wicking the pads after BGA removal and we need to cover the vias back. And I'm talking lead-free. 
 
Thank you,
 
Ioan Tempea, ing.
Ingénieur Principal Fabrication / Sr. Manufacturing Engineer 
 
30 ans déjà! - Already 30 years!
950 rue Bergar, Laval, Québec, H7L 5A1
t : 450-967-7100 ext : 244
Mtl : 514-990-5762
f : 450-967-7444
[log in to unmask]
www.digico.cc <http://www.digico.cc/>
P N'imprimer que si nécessaire - Print only if you must
 

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
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 15.0
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
-----------------------------------------------------