Patent ID: 7545246

Claim:
A piezoelectric Micro Electro Mechanical System (MEMS) switch comprising: a substrate; first and second fixed signal lines symmetrically formed in a spaced-apart relation to each other on the substrate to have a predetermined gap therebetween; a piezoelectric actuator disposed in alignment with the first and the second fixed signal lines in the predetermined gap, and comprising a first end supported on the substrate to allow the piezoelectric actuator to be movable up and down; and a movable signal line comprising a first end connected to one of the first and the second fixed signal lines, and a second end configured to be in contact with, or separate from the other of the first and second fixed signal lines, at least one side of the movable signal line being connected to an upper surface of the piezoelectric actuator, wherein the substrate has a first cavity formed below the predetermined gap to allow the piezoelectric actuator to be movable down, and wherein the substrate has a second cavity formed at a side of the first cavity to waft a first end of the one of the first and the second fixed signal lines.