It seems to me that possibly something is not right here. IMHO there is a
distinct possibility of either a mistake. For example, they mean Silver not
lead and simply messed up their chemical symbols. Or they are on a fishing
trip: This addition has already happened accidentally for example and they
are looking for advise/information to know what to do.
Whether either or neither or something else the questions don't make much
sense however you look at them. I think a discrete off the record phone call
might be in order to clarify. 

Best Wishes
 
 
 
Mike

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Amol Kane
Sent: Tuesday, November 13, 2012 4:05 PM
To: [log in to unmask]
Subject: [TN] SnPb and Pb-free paste mixture

Hi,
We have this unusual (at least for me) request from a potential new
customer. This is taken verbatim from their request for process information.
Before I go and tell them this cannot be done, I want to ask the experts out
on technet if they have seen/done something like this. My thinking is that
this would be very hard to do on the floor unless there is a custom
formulation available. I am not aware of their reasoning for asking this
other than for a very unusual (and ineffective) way of mitigating tin
whiskers. Leaving the potential flux incompatibilities aside, is this
something that is being done/can be done? I could use some expertise or
references/studies on # 2 as well.


1.       "Since our products are not subject to RoHS and our customer is not
requiring lead mitigation, is there a vendor preferred process of Pb based
or Pb-free processing.

a.       Describe your history/experience and process for adding ~3% Pb to
Pb-free paste and utilizing Pb-free processes.

b.      Any quality or reliability concerns adding ~3% Pb to Pb-free
soldering.

c.       Describe your history/experience and processes used in
transitioning a product from Pb to Pb-free (or reduced Pb).

2.       Do you know of any issues with RoHS and reliability at -65C?"

Thanks,
Amol

________________________________
Confidentiality Notice

This e-mail and any attachment(s) are intended for the individual or entity
to which this email is addressed and may contain information that is
confidential. If you are not the intended recipient or an employee or agent
responsible for delivering this e-mail to the intended recipient, please be
aware that any dissemination, distribution or copying of this communication
is strictly prohibited. If you have received this in error, please notify
the sender by telephone at 604.430.4336 or by return e-mail, and please
delete or destroy all copies of this communication. Thank you!

P     Please consider the impact on the environment before printing this
email or its attachments

______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [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 [log in to unmask] 
______________________________________________________________________