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512-Mb PROM with a three-dimensional array of diode/antifuse memory cells

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14 Author(s)
Johnson, M. ; Matrix Semicond., Santa Clara, CA, USA ; Al-Shamma, A. ; Bosch, D. ; Crowley, M.
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A 512-Mb one-time-programmable memory is described, which uses a transistorless two-terminal memory cell containing an antifuse and a diode. Cells are fabricated in polycrystalline silicon, stacked vertically in eight layers above a 0.25-μm CMOS substrate. One-time programming is performed by applying a high voltage across the cell terminals, which ruptures the antifuse and permanently encodes a logic 0. Unruptured antifuses encode a logic 1. Cells are arranged in 8-Mb tiles, 1 K rows by 1 K columns by 8 bits high. The die contains 72 such tiles: 64 tiles for data and eight tiles for error-correcting code bits. Wordline and bitline decoders, bias circuits, and sense amplifiers are built in the CMOS substrate directly beneath the memory tiles, improving die efficiency. The device supports a generic standard NAND flash interface and operates from a single 3.3-V supply.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:38 ,  Issue: 11 )

Date of Publication:

Nov. 2003

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