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US 7,442,959 B2Granted
Semiconductor device having identification number, manufacturing method thereof and electronic device
AssigneeHitachi, Ltd.
InventorMitsuo Usami
Life of this patent
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Abstract
An electronic device includes a semiconductor chip storing an identification number of N-bits and an antenna coupled to the semiconductor chip that sends out the identification number of N-bits. In order to provide a secure and efficient data storage arrangement, the identification number of N-bits is stored in accordance with the presence or absence of through holes that connect wirings to transistors included in the semiconductor chip through an insulating film formed over the transistors.
Claims19
An electronic device comprising:
- a semiconductor chip storing an identification number of N-bits;
- and
- an antenna coupled to said semiconductor chip that sends out the identification number of N-bits,
- wherein the identification number of N-bits is stored with presence or absence of a through hole that connects a wiring to a transistor included in said semiconductor chip through an insulating film formed over said transistor,
- wherein said through hole is formed on a portion irradiated by an electron beam.
2 more elements
An electronic device comprising:
- a semiconductor chip storing an identification number of N-bits;
- a demodulator;
- an antenna coupled to said semiconductor chip that sends out the identification number of N-bits;
- and
- a counter,
- wherein the identification number of N-bits is stored with presence or absence of a contact hole that connects a wiring to a transistor included in said semiconductor chip through an insulating film formed over said transistor;
- wherein said demodulator demodulates a signal received by said antenna to extract a clock signal;
- and
- wherein said counter divides said clock signal to output a divided signal, and the identification number of N-bits is outputted according to falling edges of said divided signal.
6 more elements
Dependencies are inferred from the claim text.