Wireless sensor device
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorJun Koyama
Life of this patent
Estimating the term…
Abstract
A wireless sensor device capable of constant operation without replacement of batteries. The wireless sensor device is equipped with a rechargeable battery and the battery is recharged wirelessly. Radio waves received at an antenna circuit are converted into electrical energy and stored in the battery. A sensor circuit operates with the electrical energy stored in the battery, and acquires information. Then, a signal containing the information acquired is converted into radio waves at the antenna circuit, whereby the information can be read out wirelessly.
Claims21
A wireless sensor device comprising:
- a semiconductor substrate;
- a circuit comprising a plurality of semiconductor elements, wherein the plurality of semiconductor elements are formed using the semiconductor substrate;
- a first insulating film covering the plurality of semiconductor elements;
- a thin-film secondary battery over the first insulating film;
- a second insulating film covering the thin-film secondary battery;
- a sensor electrically connected to the circuit through the first insulating film and the second insulating film;
- an antenna;
- and
- a package packing the semiconductor substrate, the circuit, the thin-film secondary battery, the sensor and the antenna.
A wireless sensor device comprising:
- a first substrate;
- a second substrate;
- a thin-film secondary battery provided on a first surface of the first substrate;
- a circuit provided on a first surface of the second substrate, the circuit comprising a plurality of semiconductor elements;
- an insulating film covering the plurality of semiconductor elements;
- an antenna over the insulating film;
- a sensor electrically connected to the thin-film secondary battery and the circuit;
- and
- a package packing the first substrate, the second substrate, the thin-film secondary battery, the circuit, the sensor and the antenna,
- wherein the first surface of the first substrate and the first surface of the second substrate face each other, and
- wherein the sensor is provided between the first substrate and the second substrate.
A wireless sensor device comprising:
- a first substrate;
- a second substrate;
- a thin-film secondary battery provided on a first surface of the first substrate;
- a circuit provided on a first surface of the second substrate, the circuit comprising a plurality of semiconductor elements;
- an insulating film covering the plurality of semiconductor elements;
- an antenna over the insulating film;
- a sensor attached to a second surface of the first substrate, the sensor electrically connected to the thin-film secondary battery and the circuit through the first substrate;
- and
- a package packing the first substrate, the second substrate, the thin-film secondary battery, the circuit, the sensor and the antenna,
- wherein the first surface of the first substrate and the first surface of the second substrate face each other.
Dependencies are inferred from the claim text.