Electronics Forum: corners (Page 2 of 66)

Re: Shorts in corners of BGA devices

Electronics Forum | Fri Jun 23 08:52:16 EDT 2000 | Dave F

John: Seek your answers in the archives. As I recall someone said: � Biggest cause of BGA shorting was out-gassing in-package moisture. � Removing shorts w/o removing the device: - Preheat the board - Lower the nozzle and heat the device - Lift the

Re: Shorts in corners of BGA devices

Electronics Forum | Fri Jun 23 10:01:35 EDT 2000 | Bob Willis

A couple of weeks back I produced a video clip for Metcal to show what happens when BGA pop or the edge of the base warps causing shorts to form. Its 2.3meg if there is enough interest in seeing this I will put it up some where for download. Bob Wil

BGA corners curling up during rework install...

Electronics Forum | Fri Oct 27 08:53:25 EDT 2006 | russ

I thjink you should bake these parts for 24 hours at 125C I used to have this problem and I even think it was the same package to be honest. Since we started baking all BGAs for rework process regardless of "condition of storage" we have increased

BGA corners curling up during rework install...

Electronics Forum | Sat Oct 28 02:25:19 EDT 2006 | mika

Agree!! Where is Your thermocouple-probes attacded and can we get the info from this? Delta-T of the comp. is very, very important! The single most important smt-process step is the profiling/recipy and as a result of this, this poor package will cor

What causes Bga corners to lift during reflow

Electronics Forum | Sat Sep 27 09:32:36 EDT 2003 | mantis

All, I was wondering what causes the corners of a bga to lift during reflow process.Now just to clarify i have been running this one particular product for 4 years and i have the process and reflow profile down to a tee.But recently i have witnessed

What causes Bga corners to lift during reflow

Electronics Forum | Mon Sep 29 02:35:28 EDT 2003 | Sam

Hi Mantis. Has there been any changes in the BGA itself? One of our BGAs changed to a newer type, and after that we had problems with corner lifting. In that case problem was BGA's structure, there was mismatch in TCE between BGA's substrate and mo

What causes Bga corners to lift during reflow

Electronics Forum | Mon Sep 29 08:24:26 EDT 2003 | davef

Look here: http://www.smtnet.com//forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=6405&#Message25582

What causes Bga corners to lift during reflow

Electronics Forum | Mon Sep 29 16:14:34 EDT 2003 | mantis

DaveF, Thanks for the link very helpful and informative. I have got in contact with our part vendor on recomendations. Regards, Mantis

What causes Bga corners to lift during reflow

Electronics Forum | Tue Sep 30 20:59:40 EDT 2003 | Dean

Have you verified the thermal profile recently? I would start there and verify your process has not shifted. It does happen.

BGA Corner

Electronics Forum | Fri Jun 10 13:04:04 EDT 2011 | spitkis2

Any suggestions as to what can cause a PBGA's corner to warp down during installation process on a rework system? A couple solder balls bridge at the corner. It appears at the pin 1 corner where the metal indicator of a BGA is exposed. I am wonder


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