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May 2000

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Subject:
From:
Barbara Burcham <[log in to unmask]>
Date:
Fri, 12 May 2000 14:06:52 -0500
MIME-Version:
1.0
X-To:
Phil Crepeau <[log in to unmask]>
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"TechNet E-Mail Forum." <[log in to unmask]>, Barbara Burcham <[log in to unmask]>
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Yes, I would mean 'permittivity'. Thanks for the correction, guess I'll
eventually get there.
Barbara

-----Original Message-----
From: Phil Crepeau [mailto:[log in to unmask]]
Sent: Friday, May 12, 2000 1:47 PM
To: [log in to unmask]
Subject: Re: [TN] Fr4 Board materials have a permeability of?


hi,

could you possibly mean permittivity rather that permeability?  permittivity
is commonly known as dielectric constant. i would expect permeability to be
meaningless with fr-4; it isn't ferromagnetic.

phil

-----Original Message-----
From: Barbara Burcham [mailto:[log in to unmask]]
Sent: Friday, May 12, 2000 11:09 AM
To: [log in to unmask]
Subject: [TN] Fr4 Board materials have a permeability of?


I was unclear when I asked this question, earlier.
Can anyone tell me how to find the permability of the FR4 family of board
materials in relationship to frequency?

Barbara Burcham

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