Patent ID: 7206215

Claim:
A method of operating an antifuse, comprising: applying a voltage across electrodes including a bottom plate electrode and a top plate electrode of a capacitor having a tantalum oxynitride film; forming a hole in the tantalum oxynitride film; creating a resistance between approximately 1000 and 6000 ohms as a result of forming the hole in the tantalum oxynitride film; wherein applying the voltage across electrodes of the capacitor includes the capacitor fabricated on an integrated circuit including: forming the bottom plate electrode; forming the tantalum oxide film on the bottom plate electrode; introducing nitrogen into the tantalum oxide film to form a tantalum oxynitride film, wherein the nitrogen is introduced at temperatures greater than 800 degrees Celsius; annealing the tantalum oxynitride film in an environment containing oxygen, wherein annealing is performed after introducing nitrogen; and forming the top plate electrode on the tantalum oxynitride film.