Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2006-03-14
2006-03-14
Cunningham, Terry D. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S437000, C307S130000, C307S156000
Reexamination Certificate
active
07012460
ABSTRACT:
An IC device has a MOSFET serving as a power switch, a condenser connected between a first input terminal of the IC and the gate of the MOSFET, and a ferroelectric condenser connected between a second input terminal of the IC and the gate of the MOSFET. A prescribed voltage having a predetermined polarity is applied across the first and the second input terminals to generate a remanent polarization oriented in a specific direction in the ferroelectric condenser, thereby raising the threshold voltage of the MOSFET to a higher level than its original level. The power switching MOSFET is fabricated in the same manufacturing process as for other circuit blocks of the IC device such that it has substantially the same threshold voltage as that of the MOSFETs in other circuit blocks.
REFERENCES:
patent: 5155573 (1992-10-01), Abe et al.
patent: 6327172 (2001-12-01), Ishiwara
patent: 2002/0043676 (2002-04-01), Ohtsuka et al.
patent: 2003/0094640 (2003-05-01), Ohtsuka et al.
patent: 2003/0142533 (2003-07-01), Ueda et al.
Cunningham Terry D.
Hogan & Hartson LLP
Rohm & Co., Ltd.
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