Are there recommendations for size of via hole in-pad for your GaN devices?
Yes! The best resource are the demo boards that use the device of choice. You can access this information by typing in the part number into search box on www.epc-co.com and choosing the first option (the landing page). This page offers all the demo boards that we have using the specific part and the vias are specified in the quick start guide. We recommend a fabrication house that can fabricated HDI level boards.