Bob,

Have run into the same situation...

In our case the customer was unable to get the product with leaded balls...
They did not want spend the time and cost to have a special run of chip manufactures and were too concerned with the cost and undefined reliability issues associated with re-balling...

Paul 

Paul Edwards
Process/Quality Engineering
Surface Art Engineering

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Robert Kondner
Sent: Tuesday, September 25, 2012 5:26 PM
To: [log in to unmask]
Subject: [TN] Leaded Paste and Lead Free BGAs - Do they mix?

Hi,

 

I have a customer using leaded paste with lead free BGAs. I think they want
to have the balls NOT collapse for better optical inspection.

 

Sounds like a really bad idea to me but I have no explanation where I can
say as why.

 

Can anyone make suggestions either way?

 

Thanks,

Bob K.



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