Memory device and semiconductor device
First Claim
1. A semiconductor device comprising:
- a control circuit;
a first reading circuit operationally connected to the control circuit;
a first memory portion operationally connected to the control circuit and the first reading circuit, the first memory portion including a first memory element;
a second reading circuit operationally connected to the control circuit;
a second memory portion operationally connected to the control circuit and the second reading circuit, the second memory portion including a first transistor and a second memory element; and
a comparison circuit operationally connected to the first reading circuit and the second reading circuit,wherein the first transistor includes an oxide semiconductor in a channel formation region.
1 Assignment
0 Petitions
Accused Products
Abstract
One of objects is to provide a nonvolatile memory device in which the occurrence of a defect in data writing is suppressed and whose area can be suppressed, or a semiconductor device including the nonvolatile memory device. A first memory portion including a nonvolatile memory element and a second memory portion (data buffer) for temporarily storing data in verifying operation in which whether the data is correctly written into the first memory portion is verified are provided. Further, the second memory portion includes a memory element and an insulated gate field effect transistor for controlling the holding of charge in the memory element; the off-state current or the leakage current of the transistor is extremely low.
148 Citations
22 Claims
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1. A semiconductor device comprising:
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a control circuit; a first reading circuit operationally connected to the control circuit; a first memory portion operationally connected to the control circuit and the first reading circuit, the first memory portion including a first memory element; a second reading circuit operationally connected to the control circuit; a second memory portion operationally connected to the control circuit and the second reading circuit, the second memory portion including a first transistor and a second memory element; and a comparison circuit operationally connected to the first reading circuit and the second reading circuit, wherein the first transistor includes an oxide semiconductor in a channel formation region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A semiconductor device comprising:
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a control circuit; a first reading circuit operationally connected to the control circuit; a first memory portion operationally connected to the control circuit and the first reading circuit, the first memory portion including a first memory element; a second reading circuit operationally connected to the control circuit; a second memory portion operationally connected to the control circuit and the second reading circuit, the second memory portion including a first transistor and a second memory element; and a comparison circuit operationally connected to the first reading circuit and the second reading circuit, wherein the first transistor includes an oxide semiconductor in a channel formation region, wherein the first memory element includes a second transistor, and wherein the second transistor includes silicon in a channel formation region. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification