Did you look at the back of the peel? Is it copper or nickel?


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Charming Chan
Sent: Friday, September 09, 2011 12:32 PM
To: [log in to unmask]
Subject: [TN] What caused gold peel off from gold finger?

Hi All, 

Would you all help check out this peel off defects for any possible cause?
The gold fingers were protected with 3M tape and reflowed for soldering, the
plating peel off from gold fingers when strip 3M tape after reflow soldering
finished. In appearance, the peel-off plating is possible gold layer. 

My question is , It's caused by nickel passivation? Any methods to analyze
the root cause?


Hi Steve, 

Would you help get the defect picture posted? Thanks.


Best Regards
Charming Chan




______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 16.0
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
For additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------


______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 16.0
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
For additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------