Patent 10109623 was granted and assigned to Qorvo on October, 2018 by the United States Patent and Trademark Office.
A semiconductor device includes a first varactor diode and a second varactor diode. The second varactor diode is coupled in series with the first varactor diode and vertically disposed over the first varactor diode. By vertically disposing the second varactor diode over the first varactor diode, the space occupied by the pair of varactor diodes can be significantly reduced.