Patent ID: 7638855
Filing Date: 2009-12-29
Classification: G11C,H01L

Abstract:
1. An anti-fuse one-time-programmable nonvolatile memory cell, comprising: a substrate; a first impurity doped region in contact with and directly on the substrate, the first impurity doped region having a first polarity; a second impurity doped region in contact with and directly on the substrate being positioned adjacent the first impurity doped region, the second impurity doped region having a second polarity which is opposite to the first polarity of the first impurity doped region, and an isolation substrate junction contact surface of the first and the second impurity doped regions connecting the substrate to isolate adjacent cells; and an anti-fuse defined in contact with the second impurity doped region; wherein impurity concentrations of the first and second impurity doped regions are different from the substrate.