[SI-LIST] AW: Re: References on electrical properties of dielectric materi
- From: "Havermann, Gert" <Gert.Havermann@xxxxxxxxxxx>
- To: "hmurray@xxxxxxxxxxxxxxx" <hmurray@xxxxxxxxxxxxxxx>, "si-list@xxxxxxxxxxxxx" <si-list@xxxxxxxxxxxxx>
- Date: Fri, 23 May 2014 07:07:18 +0000
The Time depends on the Design because Solderresist is water tight. We use some
PCBs with two time Solderresist coating and bury them in earth, Concrete and in
some applications even in water directly and they stay dry on the inside. If
you want to get a homogenious and quick saturation: don't use any Solder resist.
In regards to temperature one also has to take the very high metallic losses
into account which, on a PCB, are somewhat higher than that of pure Copper.
BR
Gert
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-----Ursprüngliche Nachricht-----
Von: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] Im
Auftrag von Hal Murray
Gesendet: Freitag, 23. Mai 2014 07:28
An: si-list@xxxxxxxxxxxxx
Cc: Hal Murray
Betreff: [SI-LIST] Re: References on electrical properties of dielectric materi
Scott McMorrow <scott@xxxxxxxxxxxxx> said:
> Make sure that the material has been saturated. Which means that it
> has to be placed in a humidity chamber for extremely long periods of
> time, to allow the moisture to diffuse into the material.
How long is that? Hours? Weeks? Months? ...
Can I find the time scale by plotting the weight over time? (I'm expecting
something like an exponential convergence.)
--
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