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February 1998

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Subject:
From:
Manfred Huschka <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Fri, 20 Feb 1998 14:15:45 -0600
Content-Type:
TEXT/PLAIN
Parts/Attachments:
TEXT/PLAIN (100 lines)
Dielectric constants of glass fabric reinforced PTFE (Teflon) are
        Dielectric Constant range in increments         Tolerance
                2.17 - 2.40                             +/- 0.02
                2.45 - 2.65                             +/- 0.04
                2.95 - 3.00                             +/- 0.05
                3.00 - 3.20                             +/- 0.05
                10

of the Taconic product range, both at 1 MHz and 10 Ghz.

FR4 at 1 MHz is between 4.3 and 4.8 (56 percent and 42 percent resin content of a laminate, resp.), so is G10.
4.8 would be of rigid board or thin laminates consisting of multiples of 7628 glass fabric; 4.3 of a 6 mil
laminate consisting of 2 plies 1080. Typical DK tolerance of FR4 is +/- 0.20 at 1 MHz

Regards

Manfred Huschka
Taconic Advanced Dielectrics Division
Mullingar, Republic of Ireland

--- On Fri, 20 Feb 1998 11:18:22 -0800  Gary Griffin <[log in to unmask]> wrote:
Thanks to everyone who tried to help with my original question about pre-preg material dielectrics.


As it turns out I used the wrong term.  What I meant was, I would like to get the dielectric constants for the
materials commonly used to make PCBs.  These include FR4, Tetrafunctional FR4, G10, GTEK, Polyimide, Cyanate
Ester, Teflon and the new material from GORE, what ever it is called.  Would it be possible to get the ranges
as well, since I know that the dielectrics are not necessarily constant.


Assume that testing is out of the question.


Since I am at it.  Have I missed any materials?  I know that there are some new ones that I may  not be aware
of.


Gary



==================================================

<color><param>0000,0000,ffff</param>Gary Griffin

Engineering Manager

Phone (408) 501-7156

Fax   (408) 437-1976

Pager 1-800-759-7243 Pin: 145-1886

Alpha pager email griffin_p or [log in to unmask]

SABER group Interface Products</color>

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---------------End of Original Message-----------------

--------------------------------------------------------
Name: Manfred Huschka
Taconic Advanced Dielectric Division, Lynn Industrial Park, Mullingar,
Co. Westmeath, Republic of Ireland
Office: PF 1275, D-51676 Wipperfuerth, Germany
        Tel.: +49 2267 888004,
        Fax:  +49 2267 888005
E-mail: Manfred Huschka <[log in to unmask]>
Web: www.4taconic.com
Date: 02/20/98
Time: 21:08:23

This message was sent by Z-Mail Pro - from NetManage
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