Materion (formerly Zentrix) is a leading manufacturer of ceramic packages for RF power transistors and MMICs. We offer BeO packages for VMOS and bipolar transistors. Our brazed ceramic air cavities are suitable for high power Si and GaN transistors. We are the exclusive vendor of our CuPack line of surface mount packages. CuPacks offer a very low thermal resistance and low microwave loss, making them the ideal package for high power GaN FETs and MMICs.