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Date: | Fri, 23 Mar 2007 10:19:29 -0400 |
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Good Morning,
This is my first time having a test house run the IPC T260 test 2.4.24.1.
The Time to delamination test determines how long before the board
starts to delaminate.
The Question:
What "Time to delamination" is good enough for lead free assembly?
The results for the tests we had run on a 14 layer, FR408 samples were
in 25-27 minutes
range on a number of samples.
It would seem to me, that this test is only a relative comparison
between different materials.
For example if material "A" was 12 minutes and material " B" was 20
minutes, one could
assume that "B" was a better material than "A". But, one could not
determine the if the material
could survive all the temp cycles required by assembly.
Is this a correct assumption?
I'm willing to share pictures and charts, if anyone is interested.
Thanks.
Dave
--
Dave Seymour, CID+
Catapult Communications Inc.
800 Perimeter Park Dr, Suite A
Morrisville, NC 27560
Direct: (919)653-4249
Main: (919)653-4180
Fax: (919)653-4297
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