MEMORY DEVICE
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Accused Products
Abstract
It is an object to provide a memory device where an area occupied by a memory cell is small, and moreover, a memory device where an area occupied by a memory cell is small and a data holding period is long. A memory device includes a bit line, a capacitor, a first insulating layer provided over the bit line and including a groove portion, a semiconductor layer, a second insulating layer in contact with the semiconductor layer, and a word line in contact with the second insulating layer. Part of the semiconductor layer is electrically connected to the bit line in a bottom portion of the groove portion, and another part of the semiconductor layer is electrically connected to one electrode of the capacitor in a top surface of the first insulating layer.
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Citations
19 Claims
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1. (canceled)
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2. A semiconductor device comprising:
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an insulator; an oxide semiconductor film on a side surface of the insulator; a gate insulating film adjacent to the side surface of the insulator; a gate electrode adjacent to the oxide semiconductor film; a first electrode in contact with the oxide semiconductor film at a first level; and a second electrode in contact with the oxide semiconductor film at a second level that is higher than the first level, wherein the oxide semiconductor film is provided between the insulator and the gate insulating film, wherein the gate insulating film is provided between the gate electrode and the oxide semiconductor film, and wherein the oxide semiconductor film comprises indium, tin, and zinc. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10)
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11. A semiconductor device comprising a transistor, the transistor comprising:
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a first electrode; an oxide semiconductor film on and in contact with the first electrode; a second electrode on and in contact with the oxide semiconductor film; a gate electrode adjacent to the oxide semiconductor film; and a gate insulating film between the oxide semiconductor film and a side surface of the gate electrode, wherein the oxide semiconductor film comprises indium, tin, and zinc. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification