Patent ID: 7635896

Claim:
An integrated electronic device of the SOI type comprising: a semiconductor substrate, an insulating layer on the semiconductor substrate, a semiconductor active layer on the insulating layer, components of the device integrated in the active layer, at least one contact trench crossing the insulating layer, the at least one contact trench being at least partially filled with semiconductor material; a contact region enclosing the at least one contact trench, the contact region having the same type of conductivity as and a concentration of impurities higher than the semiconductor substrate and the active layer, an insulating trench extending from an exposed surface of the active layer to the insulating layer around the at least one contact trench, the insulating trench insulating an active region of the active layer from a remaining portion thereof, the components being integrated in the remaining portion of the active layer, a further contact region in the active region extending from the exposed surface of the active layer to the contact region, the further contact region having the same type of conductivity as and a concentration of impurities higher than the active layer, and an electrical contact on a contact window of an exposed surface of the further contact region, the electrical contact contacting the semiconductor substrate through the at least one contact trench.