Id chip and ic card
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorShunpei YAMAZAKI
Life of this patent
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Abstract
The present invention provides an ID chip or an IC card in which the mechanical strength of an integrated circuit can be enhanced without suppressing a circuit scale. An ID chip or an IC card of the present invention has an integrated circuit in which a TFT (a thin film transistor) is formed from an insulated thin semiconductor film Further, an ID chip or an IC card of the present invention has a light-emitting element and a light-receiving element each using a non-single-crystal thin film for a layer conducting photoelectric conversion. Such a light-emitting element or a light-receiving element may be formed consecutively to (integrally with) an integrated circuit or may be formed separately and attached to an integrated circuit.
Claims20
(canceled)
A semiconductor device comprising:
- a conductive layer configured to generate an alternating voltage based on a received radio wave;
- a light-receiving element configured to receive a first optical signal and generate a first electrical signal;
- an integrated circuit including:
- a rectification circuit configured to rectify the alternating voltage;
- and a power supply circuit configured to generate a power supply voltage from rectified voltage and supply the power supply voltage to other circuits included in the integrated circuit, the integrated circuit being configured to generate a second electrical signal from the first electrical signal;
- and
- a light-emitting element configured to receive the second electrical signal from the integrated circuit and generate a second optical signal,
- wherein the light-receiving element and the light-emitting element are not provided in the integrated circuit.
A semiconductor device comprising:
- a conductive layer configured to generate an alternating voltage based on a received radio wave;
- a light-receiving element configured to receive a first optical signal from a reader/writer and generate a first electrical signal;
- an integrated circuit including:
- a rectification circuit configured to rectify the alternating voltage;
- and a power supply circuit configured to generate a power supply voltage from rectified voltage and supply the power supply voltage to other circuits included in the integrated circuit, the integrated circuit being configured to generate a second electrical signal from the first electrical signal;
- and
- a light-emitting element configured to receive the second electrical signal transmitted from the integrated circuit, generate a second optical signal, and send the second optical signal to the reader/writer,
- wherein the conductive layer, the light-emitting element, and the light-receiving element are not included in the integrated circuit, and
- wherein the integrated circuit, the light-emitting element, and the light-receiving element are attached to a substrate with an adhesive agent.
An IC card comprising:
- a conductive layer configured to generate an alternating voltage based on a received radio wave;
- a light-receiving element configured to receive a first optical signal sent from a reader/writer and generate a first electrical signal;
- an integrated circuit including:
- a rectification circuit configured to rectify the alternating voltage;
- and a power supply circuit configured to generate a power supply voltage from rectified voltage and supply the power supply voltage to other circuits included in the integrated circuit, the integrated circuit being configured to generate a second electrical signal from the first electrical signal;
- and
- a light-emitting element configured to receive the second electrical signal and send a second optical signal to the reader/writer,
- wherein the conductive layer, the light-emitting element, and the light-receiving element are not provided in the integrated circuit.
Dependencies are inferred from the claim text.