Many thanks for the great information. Will try to tie up the loose ends
and let you know what final resolution was.
Regards
Tom Gervascio
Principal Process Engineer
Sypris Electronics
Desk/VoiceMail 813-972-6763
Beeper 813-887-0098
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Igoshev, Vladimir
Sent: Wednesday, March 19, 2008 6:08 PM
To: [log in to unmask]
Subject: Re: [TN] Case of the popping BGAs
Well, that is what I see all the time. It muist be a "disconnectal
somewhere :-)
Regards,
Vladimir
----- Original Message -----
From: Wenger, George M. <[log in to unmask]>
To: Igoshev, Vladimir; [log in to unmask] <[log in to unmask]>
Sent: Wed Mar 19 17:42:44 2008
Subject: RE: [TN] Case of the popping BGAs
1 micron (40 microinches) of NiSn IMC is hard to believe. That is
much thicker than any NiSn IMC I've ever seen
Regards,
George
George M. Wenger
Andrew Wireless Solutions
Senior Principal FMA / Reliability Engineer
40 Technology Drive, Warren, NJ 07059
(908) 546-4531 [Office] (732) 309-8964 [Cell]
[log in to unmask]
________________________________
From: Igoshev, Vladimir [mailto:[log in to unmask]]
Sent: Wednesday, March 19, 2008 5:35 PM
To: [log in to unmask]; Wenger, George M.
Subject: Re: [TN] Case of the popping BGAs
That well could be. The penetration depth is only around 1 micron.
Regards,
Vladimir
----- Original Message -----
From: TechNet <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Sent: Wed Mar 19 17:30:54 2008
Subject: Re: [TN] Case of the popping BGAs
I have a hard time believing that at 10kV Werner,
I have a hard time believing that at 10kV acceleration potential that
they see only the SnNi IMC and very little of the SnPb solder behind the
IMC.
Regards,
George
George M. Wenger
Andrew Wireless Solutions
Senior Principal FMA / Reliability Engineer
40 Technology Drive, Warren, NJ 07059
(908) 546-4531 [Office] (732) 309-8964 [Cell]
[log in to unmask]
________________________________
From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Wednesday, March 19, 2008 5:15 PM
To: Wenger, George M.; [log in to unmask]
Subject: Re: [TN] Case of the popping BGAs
Hi George,
From my experience, what they seeing on the ball side is pretty much
SnNi IMC. What i find missing is any Au.
Werner
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