Patent ID: 8338855

Claim:
A voltage-controlled vertical bi-directional monolithic switch, the switch being referenced with respect to a first surface of the switch, the switch being formed from a lightly-doped N-type semiconductor substrate, the switch comprising: a control structure to control a conductive state of the switch, the control structure comprising, on a second surface side opposite the first surface, a first P-type well in which is formed an N-type region, and a second P-type well in which is formed a MOS transistor, the first P-type well and a gate of the MOS transistor being electrically connected to a control terminal, said N-type region being electrically connected to a main terminal of the MOS transistor, and a second main terminal of the MOS transistor being electrically connected to the first surface of the switch; a power area comprising at least one component for conducting a current through the switch; and on the first surface side, between the semiconductor substrate and a first surface metallization connected to the first surface, an insulating layer extending at least under the control structure comprising at least the first P-type well and the second P-type well and not under the power area of the switch.