Semiconductor device
First Claim
1. A semiconductor device comprising:
- a transistor having a gate, a source, and a drain, one of the source and drain being a first end and the other being a second end; and
a capacitor comprising a storage node connected to the first end, and a plate electrode, whereina first current flowing between the source and drain when a potential Va is applied to said second end and a potential Vb, which is higher than Va, is applied to said storage node is smaller than a second current flowing between the source and drain when a potential Vb is applied to said second end and a potential Va is applied to said storage node, while a potential of the gate and a potential of the plate electrode are maintained to be constant and a voltage of the gate is smaller than a threshold voltage.
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Accused Products
Abstract
A semiconductor device comprises a transistor having a gate, a source, and a drain, one of the source and drain being a first end, and the other being a second end, and a capacitor comprising a storage node connected to the first end and a plate electrode, wherein a current flowing between the source and drain when a potential Va is applied to the second end and a potential Vb, which is lower than Va, is applied to the storage node is smaller than a current flowing the source and the drain when a potential Vb is applied to the second end and a potential Va is applied to the storage node, while the potential of the gate and the potential of the plate electrode are maintained to be constant. Here, the transistor should preferably be a MIS-type.
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Citations
21 Claims
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1. A semiconductor device comprising:
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a transistor having a gate, a source, and a drain, one of the source and drain being a first end and the other being a second end; and a capacitor comprising a storage node connected to the first end, and a plate electrode, wherein a first current flowing between the source and drain when a potential Va is applied to said second end and a potential Vb, which is higher than Va, is applied to said storage node is smaller than a second current flowing between the source and drain when a potential Vb is applied to said second end and a potential Va is applied to said storage node, while a potential of the gate and a potential of the plate electrode are maintained to be constant and a voltage of the gate is smaller than a threshold voltage.
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2. A semiconductor device comprising:
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a transistor having a gate connected to a gate control line, a source, and a drain, one of the source and drain being a first main electrode connected to a data transfer line, and the other being a second main electrode; and a capacitor comprising a storage node connected to the second main electrode, and a plate electrode connected to a common electrode, wherein the transistor and the capacitor constitute a memory cell, and a threshold voltage when a potential Va is applied to said data transfer line and a potential Vb, which is higher than Va, is applied to said storage node is higher than a threshold voltage when a potential Vb is applied to said data transfer line and a potential Va is applied to said storage node, while the potential of the gate and a potential of the plate electrode are maintained to be constant. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 21)
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18. A semiconductor comprising:
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a transistor having a gate, a source, and a drain, one of the source and drain being a first main electrode and the other being a second main electrode connected to the gate electrode; and a capacitor comprising a storage node connected to the second main electrode, and a plate electrode, wherein a predetermined voltage is applied to the plate electrode such that the storage node has potentials of two values, one being a first voltage higher than a threshold voltage of the transistor and the other being a second voltage lower than the threshold voltage, the storage node has a higher potential than the first main electrode when the storage node is applied with the first voltage, and the first main electrode has a higher potential than the storage node when the storage node is applied with the second voltage, and the transistor has a lower threshold voltage when the storage node is applied with the first voltage than when the storage node is applied with the second voltage.
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19. A semiconductor device comprising:
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a transistor having a gate connected to a gate control line, a source, and a drain, one of the source and drain being a first main electrode connected to a data transfer line, and the other being a second main electrode; and a capacitor having a storage node connected to the second main electrode and a plate electrode connected to a common electrode, wherein the transistor and the capacitor constitute a memory cell, the storage node is electrically connected with alternatively two voltage sources having different voltages from each other via said the data transfer line and said transistor, and data are stored as information of an electric charge or an electric polarity, and a retention time of an electric charge or an electric polarity is longer when data holding state is set after the storage node is connected to the first voltage source having a high voltage than when data holding state is set after the storage node is connected to the second voltage source having a low voltage. - View Dependent Claims (20)
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Specification