Patent ID: 9006851
Filing Date: 2015-04-14
Classification: H01L,Y02E

Abstract:
1. A device comprising: a silicon wafer having its front surface comprising a first layer of a first conductivity type and a second layer of a second conductivity type forming a photovoltaic cell; first vias crossing the wafer from a rear surface of the first layer and second vias crossing the wafer from the rear surface of the second layer; metallization levels on the rear surface of the wafer, an external level of these metallization levels defining contact pads; an antenna formed in one of the metallization levels; one or more chips assembled on the contact pads and attached to the rear surface of the wafer; and an encapsulant embedding the one or more chips; wherein the metallization levels are shaped to provide selected interconnects between different elements of the device; wherein the device comprises a stand-alone device; and wherein the photovoltaic cell is coupled to only chips within the encapsulant and is configured to supply power to only chips within the encapsulant.