Patent 7256461 was granted and assigned to Winbond Electronics on August, 2007 by the United States Patent and Trademark Office.
The present invention provides a combinded FOX and poly gate structure, for effectively reducing the trigger voltage of a conventional field device, for improving the robustness of a NMOS transistor of a small drive I/O circuit, and for improving the ESD performance of a stack-gate voltage tolerant I/O.