Lyon Yuan

 

 

-----Original Message-----
From: [log in to unmask] [mailto:[log in to unmask]] On Behalf Of Lyon Yuan
Sent: Wednesday, September 04, 2013 9:32 PM
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" < <mailto:[log in to unmask]:[log in to unmask]> [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:[mailto:[log in to unmask]]> [mailto:[log in to unmask]] On Behalf Of Lyon Yuan Sent: Wednesday, September 04, 2013 6:40 AM To:  <mailto:[log in to unmask]:[log in to unmask]> [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  <mailto:[log in to unmask]:[log in to unmask]> [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  <mailto:[log in to unmask]:[log in to unmask]> [log in to unmask]<mailto:[log in to unmask]> ______________________________________________________________________

 

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