Patent ID: 8357550

Claim:
Method for manufacturing a sensor device comprising a thermal sensor, a battery, an antenna, an electronic circuitry and a solar cell together integrally in one semiconductor carrier, the method comprising the steps of: providing a silicon wafer having a wafer body with two opposite, mutually parallel main surfaces; in a first processing stage, manufacturing a first functional layer in or on one of said main surfaces, comprising a thermal sensor portion with at least one thermal sensor, and manufacturing a functional layer comprising electronic circuitry arranged in a non-overlapping relationship with the thermal sensor portion; in a second processing stage following the first processing stage, manufacturing a second functional layer having a material portion containing a battery and an antenna arranged in a non-overlapping relationship with the thermal sensor portion; in a third processing stage following the first processing stage, manufacturing a third functional layer having a material portion containing one or more solar cells arranged in a non-overlapping relationship with the thermal sensor portion; in a fourth processing stage following the third processing stage, the portion of the wafer body underneath the thermal sensor portion is removed, such as to result in a recess having a depth reaching from the bottom surface side to the thermal sensor portion in the first functional layer.