Patent ID: 7876615
Filing Date: 2011-01-25
Classification: G11C,H01L

Abstract:
1. A method of operating a one-time programmable (OTP) single transistor device for storing at least one data bit situated on a substrate comprising: providing a floating gate for the OTP single transistor device; wherein said floating gate is comprised of a material that is also shared by an interconnect and/or another gate for a separate transistor device also situated on the substrate and associated with a separate logic gate and/or a volatile memory; providing a source region for the OTP single transistor device; and providing a drain region for the OTP single transistor device overlapping a variable areal portion of said floating gate and capacitively coupled thereto; wherein an amount of capacitive coupling can be adjusted for the OTP single transistor device based on one of altering a number of N (N>1) separate drain regions selected to overlap said floating gate and/or a variable programming voltage; setting a threshold of said floating gate for the OTP single transistor device by selecting said variable programming voltage and/or which of said N separate drain regions provide a current of channel hot electrons.