Patent ID: 7151425

Claim:
An RF MEMS switch comprising: a cap substrate having via holes at both sides thereof, the via hole provided with a connection line; a signal transmission line having a first signal transmission line and a second signal transmission line spaced from each other with a certain gap on a lower surface of the cap substrate; a ground line formed at both sides of the transmission line; a connection pad formed at an upper surface of the cap substrate and electrically connected to the transmission line and the ground line by the connection line; a bottom substrate having a certain gap from the cap substrate; a piezoelectric capacitor formed at one side of a suspension layer formed at an upper surface of the bottom substrate, and actuated with a piezoelectric characteristic by receiving an external power; and a contact electrode formed at another side of the suspension layer and moved up and down by a displacement of the piezoelectric capacitor, for selectively turning on/off RF signals of the first signal transmission line and the second signal transmission line.