Re:Dielectric Constant of Prepreg layer

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Re:Dielectric Constant of Prepreg layer

Postby Sal Hernandez » Mon May 14, 2012 9:30 am

The dielectric Constant of the FR4 material we use for our online services is 4.5 +/- 0.10. You can review the pcb stackups along with tolerances and Dk on our construction detail page. The dielectric constant is the same for the prepreg and core.

http://www.sunstone.com/products-services/quickturn-proto-boards/construction-detail.aspx

We also offer Rogers 4350 through our PCBexpress (Rogers 4350 material, .020 inch thickness, 2 layer prototype board, no silkscreen, no solder mask, 25 qty max with dimensions no more than 8 X 8 inches.)service. The dielectric constant for this material is 3.66.
Regards,

Sal Hernandez
Software Support Engineer I
Sunstone Circuits
13626 S. Freeman Road
Mulino, OR 97042
Phone: 503-829-9108 x226
Fax: 503-829-5482
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