https://docs.oshpark.com/resources/four-layer-substrate-FR408HR.pdf
@ -41,6 +41,7 @@ static DIELECTRIC_SUBSTRATE substrateMaterial[] =
{
{ NotSpecifiedPrm(), 0.0, 0.0 }, // Not specified, not in .gbrjob
{ "FR4", 4.5, 0.02 }, // used in .gbrjob file
{ "FR408-HR", 3.69, 0.0091 }, // used in .gbrjob file
{ "Polyimide", 1.0, 0.0 }, // used in .gbrjob file
{ "Polyolefin", 1.0, 0.0 }, // used in .gbrjob file
{ "Al", 8.7, 0.001 }, // used in .gbrjob file