Manufacturer should stand behind its own products that passed 4 or 5 (depend
its/customer SOW terms) thermal cycles (rework, reflow or re-balling).

Reuven

On Wed, Jun 1, 2011 at 10:21 PM, Gerald Bogert <
[log in to unmask]> wrote:

> June 1, 2011
>
>
>
> Anyone have technical data to support (or not support) re-balling of
> BGAs to change from SAC balls to Pb balls???
>
>
>
> My understanding is that because of the extra heat cycle involved, BGA
> manufacturers may not stand behind their part warranty if re-balling is
> done.  I also seem to recall a technical poster or paper presented at
> IPC several years ago which I believe indicated a reduction in
> reliability of the part if it is re-balled.
>
>
>
> Also seems to me that if one were to re-ball a BGA, this would be a
> repair and not a reqork process and as such may require specific
> customer approval.
>
>
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-- 

Best Regards,

*Reuven Rokah*

Mobile: 972-52-60-120-18
Tele-fax: 97239360688
<http://www.rokah-technologies.com/>[log in to unmask]
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