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May 2000

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Date:
Fri, 5 May 2000 12:41:02 -0700
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Thanks, Bob,

May be I did not make it clear. I know the number tells something about the
resin content, thickness, and the glass fabric layer. However, I'm looking for
the exact specification of each number. I would appreciate if someone can direct
me to the related websites, or publications.

Regards,
K.K. Chin
Artesyn Technologies,
Fremont, CA




Bob Dube <[log in to unmask]> on 05/05/2000 12:18:46 PM

Please respond to "TechNet E-Mail Forum." <[log in to unmask]>; Please respond to
      Bob Dube <[log in to unmask]>

To:   [log in to unmask]
cc:    (bcc: KK Chin)

Subject:  Re: [TN] Prepreg numbering



I'm not sure if "acronym" is the best word, but theyare designations for
pre-preg styles common to all manufacturers. They have their roots in the
glass cloth manufacture. Although it may vary somewhat from manufacturer to
manufacturer, these designators generally refer to thickness of the pre-preg
(with also some effect on resin content). You can usually use several
different combinations of pre-preg designations to acheive the same
dielectric thickness in the finished board. However, be careful, for there
is often a price to pay for the choices made.


Bob Dube

-----Original Message-----
From: KK Chin <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: Friday, May 05, 2000 2:15 PM
Subject: [TN] Prepreg numbering


>A PCB supplier recommended me to fine tune a  FR-4 multilayer lay-up to
make use
>of certain popular prepreg material. He named the prepregs by numbers like
7628,
>1652, 1080, etc. Are these numbers common acronym, or just from a specific
>manufacturer's catalog? How can I decipher these numbers?
>
>Thanks,
>
>K.K. Chin
>Artesyn Technologies,
>Fremont, CA
>
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