Patent ID: 6943408

Claim:
A bidirectional switch, comprising: a semiconductor substrate having a first surface for forming a trench; a control structure formed in the trench to enable a conduction channel in response to a control signal, and having a dielectric layer along a wall of the trench and a control electrode adjacent to the dielectric layer, wherein the dielectric layer extends onto the first surface, and wherein the dielectric layer has a first thickness along the wall, and wherein the dielectric layer has a second thickness along the first surface, wherein the second thickness is greater than the first thickness, and wherein the control electrode extends above the first surface; a first conduction electrode having a first layer formed at the first surface for receiving a current and a second layer underlying the first layer for coupling the current to the conduction channel, wherein the first layer is spaced a predefined distance from the control electrode; and a second conduction electrode disposed at a lower portion of the trench for receiving the current from the conduction channel.