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September 2013

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Subject:
Re: EXTERNAL: [TN] BGA pad drop
From:
"Wenger, George M. [Contractor]" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Wenger, George M. [Contractor]
Date:
Wed, 4 Sep 2013 08:35:04 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (1 lines) 
Hi Lyon,

You might want to send the picture to Steve to post on his site so we all can see it.

Regards,
George
George M. Wenger
Failure Signature & Characterization Lab LLC
609 Cokesbury Road, High Bridge, NJ 08829
(908) 638-8771 Home (732) 309-8964 Mobile
E-mail: [log in to unmask]
[log in to unmask]


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Lyon Yuan
Sent: Wednesday, September 04, 2013 9:32 AM
To: [log in to unmask]
Subject: Re: [TN] EXTERNAL: [TN] BGA pad drop

Hi Ben,

I send a clear picture for your reference

Lyon Yuan

-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]] On Behalf Of Gumpert, Ben
Sent: Wednesday, September 04, 2013 8:04 PM
To: [log in to unmask]
Subject: Re: [TN] EXTERNAL: [TN] BGA pad drop

Lyon,

I haven’t seen that.
Typically the pads on the BGA are solder mask defined, which makes them much more secure than the usual non-solder mask defined pads on the PWB.

Ben

From: [log in to unmask] [mailto:[log in to unmask]]
Sent: Wednesday, September 04, 2013 7:04 AM
To: Gumpert, Ben
Cc: TechNet
Subject: Re:Re: [TN] EXTERNAL: [TN] BGA pad drop

hi ben,

it is pad missing from bga
在2013/09/04， "Gumpert, Ben" <[log in to unmask]<mailto:[log in to unmask]>> 写道：
Lyon, By 'pad drop' do you mean lifted pads? (Pads stayed with the BGA?) Usually this means that there wasn't enough heat - that the solder was not melted in all locations. Ben -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Lyon Yuan Sent: Wednesday, September 04, 2013 6:40 AM To: [log in to unmask]<mailto:[log in to unmask]> Subject: EXTERNAL: [TN] BGA pad drop guys,we found a few BGA pad drop after removed from pcba boards.what is reason to cause the issue ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask]<mailto:[log in to unmask]> ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask]<mailto:[log in to unmask]> ______________________________________________________________________

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