Active solid-state devices (e.g. – transistors – solid-state diode – Gate arrays – With particular signal path connections
Reexamination Certificate
2005-12-06
2005-12-06
Wilson, Allan R. (Department: 2815)
Active solid-state devices (e.g., transistors, solid-state diode
Gate arrays
With particular signal path connections
C257S202000
Reexamination Certificate
active
06972446
ABSTRACT:
A number of transistors including gate oxide films of different thicknesses and an external terminal are formed on a semiconductor substrate. The transistor connected directly to the external terminal is a transistor other than the transistor having the thinnest gate oxide film. That is, a node which is in contact with an external power supply and thus requires a high breakdown voltage is formed of a thick gate oxide film transistor, while a node which is not in contact with the external power supply is formed of a thin gate oxide film transistor. With this structure, a number of transistors including gate oxide films of different thicknesses can be integrated in a single chip without deterioration of the transistor characteristics. Hence, the degree of freedom with which to design devices/circuits can be remarkably enhanced.
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Banner & Witcoff , Ltd.
Kabushiki Kaisha Toshiba
Wilson Allan R.
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