EEPROM MEMORY CELL WITH LOW VOLTAGE READ PATH AND HIGH VOLTAGE ERASE/WRITE PATH
An electrically erasable programmable read only memory (EEPROM) cell may include a substrate including at least one active region, a floating gate adjacent the substrate, a write/erase gate defining a write/erase path for performing high voltage write and erase operations, and a read gate defining a...
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creator | HYMAS MEL ALVAREZ DANIEL SHIELDS JEFFREY A DARYANANI SONU HEWITT KENT CHEN BOMY WONG JACK |
description | An electrically erasable programmable read only memory (EEPROM) cell may include a substrate including at least one active region, a floating gate adjacent the substrate, a write/erase gate defining a write/erase path for performing high voltage write and erase operations, and a read gate defining a read path for performing low voltage read operations, wherein the read path is distinct from the write/erase path. This allows for a smaller read gate oxide, thus allowing the cell size to be reduced. Further, the EEPROM cell may include two independently controllable read gates, thereby defining two independent transistors which allows better programming voltage isolation. This allows the memory array to be drawn using a common source instead of each column of EEPROM cells needing its own source line. This makes the array more scalable because the cell x-dimension would otherwise be limited by each column needing two metal 1 pitches. |
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subjects | INFORMATION STORAGE PHYSICS STATIC STORES |
title | EEPROM MEMORY CELL WITH LOW VOLTAGE READ PATH AND HIGH VOLTAGE ERASE/WRITE PATH |
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