Denny,
As long as the US military does not want to know about "wet" Vancouver
and "dry" Alberta Badlands. Contrary to what Dave Hillman says, we are
still not the fifty-first state.
Bev
RIM
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Dennis Fritz
Sent: Wednesday, August 29, 2007 10:01 AM
To: [log in to unmask]
Subject: Re: [TN] PCB matl properties - water effect
In a message dated 8/29/2007 2:23:11 A.M. Eastern Daylight Time,
[log in to unmask] writes:
Hi Leo,
I have some data about hydrolysis for a glassfiber reinforced PWB type
that is similar to FR-4. Two diagrams on tensile modulus and tensile
strength vs. immersion in stem and water vs time up to 1,000 hs. Can
send offline if you are interested.
Inge
I have the same interest - physical properties of laminate with changes
in
humidity. My interest is in vibration performance of military boards,
and we
have determined that laminate stiffness definitely plays a role.
However, we
would also like to know if "wet - Somalia" versus "dry - Saudi Arabia"
locations also affects vibration performance. Thanks in advanced.
Dennis Fritz
SAIC, Inc (Crane Naval Weapons Depot - Indiana).
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