Robinson Intellectual Property Law Office, P.C.
Semiconductor device
An object is to provide a semiconductor device with a novel structure, which can hold stored data even when not powered and which has an unlimited number of write cycles. A semiconductor device is formed using a material capable of sufficiently reducing the off-state current of a transistor, such as an oxide semiconductor material that is a widegap semiconductor. The use of a semiconductor material capable of sufficiently reducing the off-state current of a transistor allows data to be held for a long time. In addition, the timing of potential change in a signal line is delayed relative to the timing of potential change in a write word line. This makes it possible to prevent a data writing error.
Semiconductor Energy Laboratory Co., Ltd.
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G11C H01L H01L H01L
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Shuhei Hiroki Kiyoshi Takanori
Nagatsuka Inoue Kato Matsuzaki