Chris - I agree with Mike
It would be incorrect to test lower materials to higher standards

Jim

-----Original Message-----
From: IPC-600-6012 [mailto:[log in to unmask]] On Behalf Of Mike Hill
Sent: Monday, March 21, 2011 3:16 PM
To: [log in to unmask]
Subject: [IPC-600-6012] mixed stack thermal shock temps

Chris,

I do not think we have this documented in 6012 but

The product is only as good as the weakest material.  Based on that and
assuming the PTH goes through all three materials, it would revert to
the 40/85 cycles.

Mike Hill

-----Original Message-----
From: IPC-600-6012 [mailto:[log in to unmask]] On Behalf Of Chris
Mahanna
Sent: Monday, March 21, 2011 12:10 PM
To: [log in to unmask]
Subject: [IPC-600-6012] mixed stack thermal shock temps

Hi everyone,
We are testing product for a 6012 contract, but the product is mixed
Rogers/GF.
6012 Optional Thermal Shock is required, but no other advise is given.

So, in your opinion do we run it at:

-40/85 (GX/GY)
-55/125 (GF)
-65/105 (6018A) ?

I know, ask the end customer, but I'm wondering what the answer is from
a broader industry perspective.

Thanks,
Chris


Chris Mahanna
Robisan Laboratory Inc.
6502 E. 21st Street
Indianapolis, Indiana 46219
317-353-6249


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

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

NOTICE:  This email message is for the sole use of the intended recipient(s) and may contain confidential and privileged information.  Any unauthorized review, use, disclosure or distribution is prohibited.  If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message.

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