BGA rework

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Dear All: We have a problem of soldering big BGA's (3.5Cm... - Mar 19, 2001 by Hany A. Salam

Have you done any analysis on the failed rework? There could... - Mar 19, 2001 by

Process Sciences, Inc. has had previous success with solderi... - Mar 19, 2001 by

Dear Mr. Stephen: After all boards we lost & hard time we... - Mar 20, 2001 by Hany A. Salam

Hany A. Salam

#5628

BGA rework | 19 March, 2001

Dear All:

We have a problem of soldering big BGA's (3.5Cm * 3.5 Cm)during rework or repair. With three big companies stations (hot air & infrared) with their support, they faild to re-solder even one BGA succesfully. Note that we workes on a good tested boards so we are sure of the results. Can any one help?

Hany

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Steve

#5633

BGA rework | 19 March, 2001

Have you done any analysis on the failed rework? There could be any one of several reasons, i.e. bad alignment, wrong reflow profile, bad pad plating, etc.

More information will help us help you.

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Stephen Schoppe

#5636

BGA rework | 19 March, 2001

Process Sciences, Inc. has had previous success with soldering BGAs of this size on large assemblies.

Please let us know if you would like us to provide assistance.

Stephen Schoppe 512-259-7070 ph. sms@process-sciences.com

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Hany A. Salam

#5647

BGA rework | 20 March, 2001

Dear Mr. Stephen:

After all boards we lost & hard time we had, the only convencing solution for us is to run a good pc_motherboard (which is our product)to confirm the experiment. After that we need to remove the big BGA ,clean & flux the PCB then solder a new one & finally run this motherboard again to be sure of the result. We are ready to ship all the needed boards & the new BGA to anyone who can do it right many times.

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