18965260. SEMICONDUCTOR DEVICE (Semiconductor Energy Laboratory Co., Ltd.)

SEMICONDUCTOR DEVICE

Organization Name

Semiconductor Energy Laboratory Co., Ltd.

Inventor(s)

Kiyoshi Kato of Atsugi JP

SEMICONDUCTOR DEVICE

This abstract first appeared for US patent application 18965260 titled 'SEMICONDUCTOR DEVICE

Original Abstract Submitted

An object is to provide a semiconductor device with a novel structure in which stored data can be held even when power is not supplied and there is no limit on the number of write operations. The semiconductor device includes a first memory cell including a first transistor and a second transistor, a second memory cell including a third transistor and a fourth transistor, and a driver circuit. The first transistor and the second transistor overlap at least partly with each other. The third transistor and the fourth transistor overlap at least partly with each other. The second memory cell is provided over the first memory cell. The first transistor includes a first semiconductor material. The second transistor, the third transistor, and the fourth transistor include a second semiconductor material.