Semiconductor device
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United States of America Patent
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Mar 22, 2011
Grant Date -
Apr 15, 2010
app pub date -
Dec 15, 2009
filing date -
Sep 10, 2004
priority date (Note) -
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status (Latency Note)
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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.
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