NONVOLATILE STORAGE DEVICE AND ITS OPERATING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a nonvolatile storage device and its operating method.

SOLUTION: The nonvolatile storage device includes a first transistor connected to an n-th bit line and a second transistor connected to a (n+1)th bit line. The first transistor and the second transistor are connected in series between the n-th bit line and the (n+1)th bit line. A nonvolatile storage device having two-transistor one-bit unit cells which are the same or similar in the structures of the source areas and drain areas of storage cells can be formed. The storage capacity of the storage device can be doubled since it has two-transistor 2-bit unit cells.

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