Electronics Forum: tg and td (Page 1 of 5)

Td and Tg

Electronics Forum | Wed Aug 27 09:29:10 EDT 2008 | blnorman

I read somewhere there is a thermal measure that takes into account Tg and Td. Offhand I can't remember what it is, does anybody know what I'm talking about?

Td and Tg

Electronics Forum | Wed Aug 27 13:08:30 EDT 2008 | vladig

Td - is the degradation temperature for a laminate (board), while Tg - is glass transition one. There is one more (even more important) - delta Tg. They characterize the quality of the laminate material. Regards, Vlad www.sentec.ca

Td and Tg

Electronics Forum | Wed Aug 27 17:50:48 EDT 2008 | blnorman

I know, but somewhere I read about an equation or relationship that takes both into account to generate another number.

Td and Tg

Electronics Forum | Wed Aug 27 22:03:16 EDT 2008 | vladig

Yep, that is probably the one in the Werner's paper. Vlad www.sentec.ca

Td and Tg

Electronics Forum | Thu Aug 28 11:15:08 EDT 2008 | blnorman

BINGO. I knew there was some relationship between the 2, thanks guys.

Td and Tg

Electronics Forum | Wed Aug 27 21:22:44 EDT 2008 | davef

While you're waiting for others to reply, here are a couple of previous postings from the fine SMTnet Archives: * http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=45013 * http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=50312

Tg and reflow

Electronics Forum | Mon Dec 19 07:29:30 EST 2005 | jax

Tg is just a way to say when the board goes limp... or a quick way to rank laminates... who cares. For lead free you want to look at Td, Decomposition Temperatures. ( Temp at which the material weight changes by 5% )

Tg and reflow

Electronics Forum | Mon Dec 19 07:49:33 EST 2005 | davef

=330*C is good advice. Search the fine SMTnet Archives for earlier discussions on Td, like http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=32430

RoHS Board Delamination

Electronics Forum | Mon Nov 20 10:40:35 EST 2006 | SWAG

Thanks Mark and Dave. It sounds like our board design and problem areas are similar to yours, Mark. We talked with our customer about the grid pattern but I'm not sure where we are at with that. In reference to the Tg/Td thread, the material is a

Biral T&D and Threebond

Electronics Forum | Thu Jul 17 16:40:56 EDT 2008 | mdm93070

You can get the T&D thru Grainger.

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