Patent ID: 6781436
Filing Date: 2004-08-24
Classification: G11C

Abstract:
A method of programming an integrated electric fuse via a series coupled transistor having a drain, source and gate, wherein said fuse is coupled to one of said drain and source, said method comprising:applying a signal to said transistor gate of sufficient magnitude to activate said transistor for commencing a programming period; during said programming period, producing in said fuse a current of sufficient magnitude to produce an increase in electrical resistance in said fuse, including operating said transistor in its breakdown region; providing a voltage to said transistor such that the magnitude of said voltage is greater than the breakdown voltage of said transistor for operating said transistor in its breakdown region; and limiting said current to a magnitude that has been determined to be insufficient to damage said transistor, including dynamically varying said voltage relative to the increase in electrical resistance of said fuse during said programming period such that said current is maintained at a fixed magnitude.