Patent ID: 8074346

Claim:
A method of fabricating a radio frequency (RF) microelectromechanical system (MEMS) asymmetrical switch having two or more resonant frequencies, comprising: forming a first electrode, a second electrode and a conductive line between the first and second electrodes on a substrate; forming a first insulator layer on at least a portion of the second electrode and a second insulator layer on at least a portion of the conductive line located between the electrodes; and forming a deflectable member suspended over the conductive line in spaced relation with the second insulator layer on the conductive line and extending between and continuously asymmetrically coupled to the first and second electrodes, wherein the deflectable member is coupled to a top surface of the first electrode and covers at least a portion of the entire top surface of the first electrode and is coupled to a top surface of the first insulator layer on the second electrode and covers at least a portion of the entire top surface of the first insulator layer on the second electrode defining an area of overlap between the deflectable member and the second electrode, wherein the size of the overlap area at least partially determining a capacitance between the deflectable member and the second electrode, and wherein the deflectable member has an up-state where the deflectable member is coupled to the first electrode and the first insulator layer on the second electrode and out of contact with the insulator layer on the conductive line and a down-state where the deflectable member is coupled to the first electrode and the first insulator layer on the second electrode and in close proximity or is in contact with the insulator layer on the conductive line, wherein the switch has a first and a second resonant frequency in the down state wherein the second resonant frequency is adjustable as a function of the area of overlap between the deflectable member and the second electrode.