A semiconductor device where an interface circuit operating on a high power supply voltage and exchanging signals and data with an external device and an internal circuit operating on a low power supply voltage are integrated in a single chip. The interface circuit includes a transistor whose gate insulating...http://www.google.com/patents/US6699776?utm_source=gb-gplus-sharePatent US6699776 - MOSFET gate insulating film and method of manufacturing the same
