Patent ID: 7786000
Filing Date: 2010-08-31
Classification: G11C,H01L

Abstract:
1. A method for programming an anti-fuse one-time-programmable nonvolatile memory cell which is part of an anti-fuse one-time-programmable nonvolatile memory array, comprising: providing an anti-fuse one-time-programmable nonvolatile memory cell that is defined in a substrate, first and second impurity doped regions defined on the substrate, wherein the first and second impurity doped regions having a first polarity, and a third impurity doped region being positioned adjacent and between the first and second impurity doped regions on the substrate, the third impurity doped region having a second polarity which is opposite to the first polarity of the first and second impurity doped regions, wherein an anti-fuse layer is defined over the third impurity doped region; and applying a forward programming voltage bias between a word line and a bit line of the anti-fuse one-time-programmable nonvolatile memory cell, wherein applying the forward programming voltage burns a link in the anti-fuse layer of the anti-fuse one-time-programmable nonvolatile memory cell, and the link functions as a diode between the word line and the bit line of the anti-fuse memory cell.