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


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