Patent 11356070 was granted and assigned to Wolfspeed on June, 2022 by the United States Patent and Trademark Office.
RF transistor amplifiers include an RF transistor amplifier die having a semiconductor layer structure, a coupling element on an upper surface of the semiconductor layer structure, and an interconnect structure on an upper surface of the coupling element so that the RF transistor amplifier die and the interconnect structure are in a stacked arrangement. The coupling element includes a first shielded transmission line structure.