Patent ID: 7419868

Claim:
A method for making a nonvolatile memory device in an integrated circuit, the device including a diode having a first diode node and a second diode node, comprising: forming a first layer of a first charge type of the integrated circuit above a second layer of a second charge type of the integrated circuit, wherein the first charge type is opposite to the second charge type; removing part of the first layer and part of the second layer to form the first diode node in the first layer and to form the second diode node in the second layer, the first charge type of the first diode node being opposite to the second charge type of the second diode node, the first diode node and the second diode node separated by a junction; forming isolation dielectric areas of the integrated circuit to isolate at least part of the second diode node of the device from neighboring devices, such that the isolation dielectric areas leave the junction uncovered; forming a charge storage structure and one or more storage dielectric structures on the integrated circuit, the charge storage structure and the one or more storage dielectric structures covering at least the junction and parts of the first and second diode nodes adjacent to the junction, such that the one or more storage dielectric structures are at least partly between the charge storage structure and the first and second diode nodes, and the one or more storage dielectric structures are at least partly between the charge storage structure and a source of gate voltage of the device; and forming a gate supplying the gate voltage of the device.