Kevin - 

What are the board and lead finishes? I seem to remember this as an
issue when using ENIG or soft gold with Tin-Lead solder.


Jeffrey McGlaughlin, CID 
Engineering Designer 
Battelle 
Columbus Ohio 
http://www.battelle.org 



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Kevin Glidden
Sent: Tuesday, November 08, 2005 12:59 PM
To: [log in to unmask]
Subject: [TN] Grainy Solder Joints

We are experiencing dull / grainy TH solder joints, made by hand
soldering
w/ iron @ 500F.  At first, it appeared to be residue on the surface, so
I
started chasing the cleaner.  But all checked out OK.  I refluxed (water
soluble, ORH0) and reflowed (iron @ 600F).  This improved the finished
appearance, but not 100%.  While eutectic, the joint is perfect.  Then
when
I draw the iron away, it cools and the surface finish is no longer
smooth or
shiny.  What can cause this?


---------------------------------------------------
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
-----------------------------------------------------