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September 2001

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Subject:
From:
"Crepeau, Phil" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 27 Sep 2001 07:43:49 -0700
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hi,

keep in mind that dielectric strength (volts/mil) is a function of thickness.  by that i mean that the dielectric strength measured on a 'thin' sample will be greater than the dielectric strength measured on a thick sample.  if this is an important property, you should measure the breakdown strength on the dielectric at the thickness you intend to use.

phil

-----Original Message-----
From: Darnell, Barry (IndSys, GEFanuc, CDI)
[mailto:[log in to unmask]]
Sent: Thursday, September 27, 2001 6:56 AM
To: [log in to unmask]
Subject: [TN] Dielectric Strength


Can someone tell me the dielectric strength (how many dc volts per mil,
layer to layer) can FR-4 handle?  Also, I need to create a capacitor between
two pieces of copper
on opposite sides of the board.  How do I calculate the size of the copper
to achieve a given capacitance.

Thanks,

> Barry Darnell
> (864)627-8800 Ext. 217
> mailto:[log in to unmask]
> Computer Dynamics, Inc.
> Printed Circuit Board Designer
>

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