Patent ID: 7206214

Claim:
A one time programmable (OTP) memory having a two-bit memory cell, wherein the two-bit memory cell comprises: a first select transistor having a first current electrode coupled to a bit line, a control electrode coupled to a first word line, and a second current electrode; a programmable transistor having a first current electrode coupled to the second current electrode of the first select transistor, a control electrode dielectric, a control electrode coupled to a programming line, and a second current electrode; and a second select transistor having a first current electrode, a control electrode coupled to a second word line, and a second current electrode coupled to the second current electrode of the programmable transistor, wherein the programmable transistor has a first programmable region between the first current electrode thereof and the control electrode thereof and a second programmable region between the second current electrode thereof and the control electrode thereof, wherein in response to the first select transistor being conductive, current is passed through the first current electrode of the programmable transistor and the control electrode dielectric to the control electrode thereof in a region where the control electrode and the first current electrode overlap, and in response to the second select transistor being conductive, current is passed through the second current electrode of the programmable transistor and the control electrode dielectric to the control electrode thereof in a region where the control electrode and the second current electrode overlap, wherein current flows from the current electrode of the programmable transistor during a program operation.