Abstract
This article presents measurements of electrical and physical properties for a variety of FR4 fiberglass-reinforced resin laminates, and the respective changes following exposure to a $1.9 \times 10^{16}$ n/cm2 total neutron fluence. The selection of a printed circuit board (PCB) substrate is shown to be of consideration beyond the typical frequency-dependent parameters, specifically for high fluence radiation environments where small changes to the dielectric constant are of concern.
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