Semiconductor device
First Claim
1. A semiconductor device comprising:
- an antenna circuit;
a voltage detecting circuit;
a current amplifier circuit;
a signal processing circuit; and
a fuse having at least a first terminal and a second terminal,wherein the antenna circuit is electrically connected to the signal processing circuit through at least the fuse,wherein the voltage detecting circuit is electrically connected to the antenna circuit;
wherein the current amplifier circuit is connected to the voltage detecting circuit and the second terminal of the fuse; and
wherein the signal processing circuit is connected to the second terminal of the fuse.
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Accused Products
Abstract
A semiconductor device used as an ID chip is provided, of which operation is terminated when its role is finished or expires. According to the invention, an antenna circuit, a voltage detecting circuit, a current amplifier circuit, a signal processing circuit, and a fuse are provided over an insulating substrate. When large power is applied to the antenna circuit, a voltage is detected by voltage detecting circuit and a corresponding current is amplified by the current amplifier circuit, thereby the fuse is melted down. Also, when an anti-fuse is used, the anti-fuse can short an insulating film by applying an excessive voltage. In this manner, the semiconductor device has a function for making it invalid by stopping operation of the signal processing circuit when the role of the device is finished or expires.
26 Citations
28 Claims
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1. A semiconductor device comprising:
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an antenna circuit; a voltage detecting circuit; a current amplifier circuit; a signal processing circuit; and a fuse having at least a first terminal and a second terminal, wherein the antenna circuit is electrically connected to the signal processing circuit through at least the fuse, wherein the voltage detecting circuit is electrically connected to the antenna circuit; wherein the current amplifier circuit is connected to the voltage detecting circuit and the second terminal of the fuse; and wherein the signal processing circuit is connected to the second terminal of the fuse. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A semiconductor device comprising:
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an antenna circuit; a voltage detecting circuit; a current amplifier circuit; a signal processing circuit; and a fuse having at least a first terminal and a second terminal, wherein the antenna circuit is electrically connected to the signal processing circuit through at least the fuse, wherein the voltage detecting circuit is electrically connected to the antenna circuit; wherein the current amplifier circuit is connected to the voltage detecting circuit and the second terminal of the fuse, wherein the signal processing circuit is connected to the second terminal of the fuse, and wherein the current amplifier circuit supplies a large current from a power source terminal and the fuse is melted down due to self-heating when the large current flows to the fuse. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification