Memory device and method for operating the same
First Claim
Patent Images
1. An operation method for a memory device including:
- a first memory element provided on a first side of a semiconductor member, the first memory element having a first word line extending in a first direction and a first charge storage layer, the semiconductor member extending to a second direction, the first side of the semiconductor member being along the second direction;
a second memory element provided on a second side of the semiconductor member, the second memory element having a second word line extending in the first direction and a second charge storage layer, the second side being opposed on the first side with the semiconductor member in a third direction crossing the first direction and the second direction parallel to the substrate, the first memory element and the second memory element formed in common with the semiconductor member; and
a bit line extending in the third direction, an end of the first side being electrically connected to the bit line, an end of the second side being electrically connected to the bit line,the operation method comprising;
when writing a first data to the first memory element,applying a first potential on the second word line to write a second data to the second memory element, the first potential increasing by a first step voltage; and
applying a second potential on the first word line to write the first data to the first memory element, the second potential increasing by a second step voltage.
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Abstract
According to an embodiment, an operation method for a memory device which has a first memory element and a second memory element respectively provided on both sides of a semiconductor member includes applying a first potential on the second word line to write a second data to the second memory and applying a second potential on the first word line to write the first data to the first memory. The first potential increases by a first step voltage and the second potential increases by a second step voltage.
14 Citations
19 Claims
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1. An operation method for a memory device including:
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a first memory element provided on a first side of a semiconductor member, the first memory element having a first word line extending in a first direction and a first charge storage layer, the semiconductor member extending to a second direction, the first side of the semiconductor member being along the second direction; a second memory element provided on a second side of the semiconductor member, the second memory element having a second word line extending in the first direction and a second charge storage layer, the second side being opposed on the first side with the semiconductor member in a third direction crossing the first direction and the second direction parallel to the substrate, the first memory element and the second memory element formed in common with the semiconductor member; and a bit line extending in the third direction, an end of the first side being electrically connected to the bit line, an end of the second side being electrically connected to the bit line, the operation method comprising; when writing a first data to the first memory element, applying a first potential on the second word line to write a second data to the second memory element, the first potential increasing by a first step voltage; and applying a second potential on the first word line to write the first data to the first memory element, the second potential increasing by a second step voltage. - View Dependent Claims (2, 3, 4, 5, 19)
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6. A memory device comprising:
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a substrate; a first memory element provided on a first side of a semiconductor member, the first memory element having a first word line extending in a first direction and a first charge storage layer, the first charge storage layer being provided between the first word line and the semiconductor member, the semiconductor member extending to a second direction crossing the first direction, the first side of the semiconductor member being along the second direction; a second memory element on a second side of the semiconductor member, the second memory element having a second word line extending in the first direction and a second charge storage layer, the charge storage layer being provided between the second word line and the semiconductor member, the second side being opposed on the first side in the third direction crossing the first direction and second direction parallel to the substrate with the semiconductor member, the first memory element and the second memory element formed in common with the semiconductor member; a bit line extending in the third direction, an end of the first side being electrically connected to the bit line, an end of the second side being electrically connected to the bit line; and a control unit configured to, when writing a first data to the first memory element, apply a first potential on the second word line to write a second data to the second memory element, the first potential increasing by a first step voltage, and apply a second potential on the first word line to write the first data to the first memory element, the second potential increasing by a second step voltage. - View Dependent Claims (7, 8, 9, 10)
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11. A memory device comprising:
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a first memory element provided on a first side of a semiconductor member, the first memory element including a first charge storage layer provide between a first electrode and the first side of the semiconductor member, the semiconductor member extending to a first direction, the first side of the semiconductor member being along the first direction; a second memory element on a second side of the semiconductor member, the second memory element including a second charge storage layer provided between a second electrode and the second side of the semiconductor member, the second side being opposed on the first side with the semiconductor member, the first memory element and the second memory element formed in common with the semiconductor member; a bit line extending in the second direction, an end of the first side being electrically connected to the bit line, an end of the second side being electrically connected to the bit line; and a control unit configured to, when writing a first data to the first memory element, apply a first potential on the second electrode to write a second data to the second memory element, the first potential increasing by a first step voltage, before applying a second potential on the first electrode to write the first data to the first memory element, the second potential increasing by a second step voltage. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification