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.

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.

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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Sal Hernandez
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