SEMICONDUCTOR MEMORY DEVICE
First Claim
1. A semiconductor memory device comprising:
- a first memory cell transistor;
a bit line electrically connected to a first end of the first memory cell transistor;
a source line electrically connected to a second end of the first memory cell transistor; and
a control circuit,whereinwhen a read operation being read data from the first memory cell transistor is performed, the control circuit is configured toapply a first voltage to the bit line in a first period,apply a second voltage higher than the first voltage to the bit line and also apply a third voltage lower than the first voltage to the source line, in a second period subsequent to the first period, andsense a threshold voltage of the first memory cell transistor in a third period subsequent to the second period.
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Accused Products
Abstract
According to one embodiment, a semiconductor memory device includes: a first memory cell transistor; a bit line electrically connected to a first end of the first memory cell transistor; a source line electrically connected to a second end of the first memory cell transistor; and a control circuit. When a read operation being read data from the first memory cell transistor is performed, the control circuit is configured to apply a first voltage to the bit line in a first period, apply a second voltage higher than the first voltage to the bit line and also apply a third voltage lower than the first voltage to the source line, in a second period subsequent to the first period, and sense a threshold voltage of the first memory cell transistor in a third period subsequent to the second period.
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Citations
18 Claims
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1. A semiconductor memory device comprising:
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a first memory cell transistor; a bit line electrically connected to a first end of the first memory cell transistor; a source line electrically connected to a second end of the first memory cell transistor; and a control circuit, wherein when a read operation being read data from the first memory cell transistor is performed, the control circuit is configured to apply a first voltage to the bit line in a first period, apply a second voltage higher than the first voltage to the bit line and also apply a third voltage lower than the first voltage to the source line, in a second period subsequent to the first period, and sense a threshold voltage of the first memory cell transistor in a third period subsequent to the second period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification