Semiconductor device manufacturing: process – Including control responsive to sensed condition – Optical characteristic sensed
Reexamination Certificate
2007-12-04
2007-12-04
Lebentritt, Michael (Department: 2812)
Semiconductor device manufacturing: process
Including control responsive to sensed condition
Optical characteristic sensed
C438S005000, C438S014000, C438S016000, C257SE21521
Reexamination Certificate
active
10532991
ABSTRACT:
A sensor on a semiconductor wafer is used as a process monitor and a capacitor is employed as a power supply for the sensor. The capacitor can be formed by stacking a poly-silicon layer and a silicon nitride layer on the wafer. A timer can be used to specify an operation time or an operation timing, etc. Furthermore, unauthorized use is prevented by storing a keyword in an ROM of the process monitor.
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Crowell & Moring LLP
Lebentritt Michael
Roman Angel
Tokyo Electron Limited
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