Jack, you are presenting some good support for Werner's assertation that the 
slash sheets aren't good enough.  Don't worry about them, focus on the specs 
of the material.  Didn't you mention a rather wide in service temperature 
range?  CTE and CAF resistance are going to be important after you ship 
boards that make it through reflow.

Too many vendors do like to focus only on Tg and Td.  Which I suppose 
should make us happy that they have progressed beyond just Tg.  This is why 
we have a short number of approved fab vendors, and we request material 
data sheets for anything they prefer to use.  I would rather they narrow down 
the list to what they are comfortable with, we'll approve or reject from that 
list.

Pete

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