Semiconductor memory device and methods thereof

Details Semiconductor memory device and methods thereof Semiconductor memory device and methods thereof

2006-11-28

2009-06-16

Mai, Son L (Department: 2827)

Static information storage and retrieval

Systems using particular element

Capacitors

C365S149000, C365S185010, C257S296000, C257S302000

Reexamination Certificate

active

07548447

ABSTRACT:
A semiconductor memory device and methods thereof. The example semiconductor memory device may include a semiconductor substrate, a first source line and a second source line oriented in a first direction, the first and second source lines not in contact with each other, at least one bit line oriented in the first direction and at least one drain positioned between the first and second source lines and the at least one bit line. A first example method may include applying a first voltage to a source line, connected to the memory cell, during a write operation of the memory cell and applying a second voltage to the source line during a read operation of the memory cell, the first and second voltages not being the same and the second voltage not being a ground voltage. A second example method may include applying a first positive voltage to a word line, applying a second positive voltage to a source line, detecting a voltage at a bit line, the detected bit line voltage based on the applied first and second positive voltages and determining whether the memory cell stores data at a first logic level or a second logic level based on the detected bit line voltage.

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