Patent ID: 7477884
Filing Date: 2009-01-13
Classification: H01H,H01P

Abstract:
1. A tri-state RF switch comprising: a first well formed in a first substrate; a first input signal line and a first output signal line forming a first gap therebetween in the first well; a first driving electrode formed in the first well; a second substrate having a second well and a third well, the second substrate disposed such that the second well and the third well face the first well; a post bar forming a boundary between the second well and third well in the second substrate; a second input signal line and a second output signal line forming a second gap therebetween in the second well; a third input signal line and a third output signal line forming a third gap therebetween in the third well; a second driving electrode and a third driving electrode formed in the second well and the third well, respectively; and a membrane disposed between the first substrate and the second substrate such that the membrane crosses the first gap, the second gap and the third gap, the membrane comprising a first conductive pad that faces the first gap, a second conductive pad that faces the second gap, and a third conductive pad that faces the third gap.