Semiconductor device

• US 20070229279A1
• Filed: 03/09/2007
• Published: 10/04/2007
• Est. Priority Date: 03/10/2006
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Ishii, Masato, Kurokawa, Yoshiyuki, Atsumi, Tomoaki, Shionoiri, Yutaka, Ikeda, Takayuki, Koyama, Jun, Yamazaki, Shunpei, Osada, Takeshi
• Granted Patent: US 8,232,880 B2
• Time in Patent Office: Days
• US Class Current: 340/572.700
• CPC Class Codes: G06K 19/0701 at least one of the integrated circuit chips comprising an arrangement for power management
• CPC Class Codes: G06K 19/0702 the arrangement including a battery
• CPC Class Codes: G06K 19/0723 the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
• CPC Class Codes: G06K 19/07767 the first and second communication means being two different antennas types, e.g. dipole and coil type, or two antennas of the same kind but operating at different frequencies
• CPC Class Codes: H01Q 1/2225 used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal

Abstract

The present invention provides a battery as a power supply for supplying power in the RFID, and another antenna for charging the battery, in addition to an antenna which transmits and receives individual information to and from outside as a means for supplying power to the battery.

Claims

1. A semiconductor device comprising:

a booster antenna;

a signal processing circuit;

a battery;

a first antenna circuit to receive a first signal through the booster antenna and transmit a second signal for transmitting data stored in the signal processing circuit through the booster antenna; and

a second antenna circuit to receive a third signal for charging the battery,

wherein the second antenna circuit is operationally connected to the battery through the signal processing circuit.

7. The semiconductor device according to any one of claims 1 to 6, wherein the battery supplies power to a power supply circuit included in the signal processing circuit.

8. The semiconductor device according to any one of claims 1 to 6, wherein the first antenna circuit and the second antenna circuit transmit and receive a radio signal by an electromagnetic induction method.

9. The semiconductor device according to any one of claims 1 to 6, wherein a relation of 0.5 m<

M<

1.5 m is satisfied, where a frequency of a signal which is received by the first antenna circuit is set M (M is a positive number) and a frequency of a signal which is received by the second antenna circuit is set m (m is a positive number).

12. The semiconductor device according to any one of claims 1-6, 10 and 11, wherein the battery comprises one selected a lithium cell, a nickel metal hydride cell, a nickel cadmium cell, and a capacitor.

13. The semiconductor device according to any one of claims 1-3, further comprising

a first substrate;

a second substrate opposed to the first substrate;

the first and second antenna circuits and the signal processing circuit comprising first and second signal processing circuits over the first substrate;

the booster antenna under the second substrate;

wherein a portion of the battery are located between the booster antenna and one of the first and second antenna circuits.

2. A semiconductor device comprising:

a booster antenna;

a signal processing circuit;

a battery;

a first antenna circuit to receive a first signal and transmit a second signal for transmitting data stored in the signal processing circuit; and

a second antenna circuit to receive a third signal for charging the battery through the booster antenna,

wherein the second antenna circuit is operationally connected to the battery through the signal processing circuit.

3. A semiconductor device comprising:

a booster antenna;

a signal processing circuit;

a battery;

a first antenna circuit to receive a first signal through the booster antenna and transmit a second signal for transmitting data stored in the signal processing circuit through the booster antenna; and

a second antenna circuit to receive a third signal for charging the battery from a charger including an antenna circuit through the booster antenna,

wherein the second antenna circuit is operationally connected to the battery through the signal processing circuit.

4. A semiconductor device comprising:

a booster antenna;

a signal processing circuit;

a battery;

a first antenna circuit to receive a first signal and transmit a second signal for transmitting data stored in the signal processing circuit between a reader/writer and the first antenna through the booster antenna; and

a second first antenna circuit to receive a third signal for charging the battery,

wherein the second antenna circuit is operationally connected to the battery through the signal processing circuit.

5. A semiconductor device comprising:

a booster antenna;

a signal processing circuit;

a battery;

a first antenna circuit to receive a first signal and transmit a second signal for transmitting data stored in the signal processing circuit between a reader/writer and the first antenna; and

a second antenna circuit to receive a third signal for charging the battery from a charger including an antenna circuit through the booster antenna,

wherein the second antenna circuit is operationally connected to the battery through the signal processing circuit.

6. A semiconductor device comprising:

a booster antenna;

a signal processing circuit;

a battery;

a first antenna circuit to receive a first signal and transmit a second signal for transmitting data stored in the signal processing circuit between a reader/writer and the first antenna through the booster antenna; and

a second antenna circuit to receive a third signal for charging the battery from a charger including an antenna circuit through the booster antenna,

wherein the second antenna circuit is operationally connected to the battery through the signal processing circuit.

10. A semiconductor device comprising:

a first antenna circuit;

a second antenna circuit;

a signal processing circuit;

a battery;

a first antenna circuit to receives a first signal and transmit a second signal for transmitting data stored in the signal processing circuit; and

a second antenna circuit to receive a third signal for charging the battery, wherein the second antenna circuit is operationally connected to the battery through the signal processing circuit; and

wherein a relation of 0.5 m<

M<

1.5 m is satisfied, where a frequency of a signal which is received by the first antenna circuit is set M (M is a positive number) and a frequency of a signal which is received by the second antenna circuit is set m (m is a positive number).

11. A semiconductor device comprising:

a first antenna circuit;

a second antenna circuit;

a signal processing circuit;

a battery;

a first antenna circuit to receive a first signal and receive a second signal for transmitting data stored in the signal processing circuit between a reader/writer and the first antenna circuit; and

a second antenna circuit to receive a third signal for charging the battery from a charger including an antenna circuit,

wherein the second antenna circuit is operationally connected to the battery through the signal processing circuit; and

wherein a relation of 0.5 m<

M<

1.5 m is satisfied, where a frequency of a signal which is received by the first antenna circuit is set M (M is a positive number) and a frequency of a signal which is received by the second antenna circuit is set m (m is a positive number).