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Transistor, semiconductor device, and electronic device

專利號
US10096720B2
公開日期
2018-10-09
申請人
Semiconductor Energy Laboratory Co., Ltd.（JP Atsugi-shi, Kanagawa-ken）
發(fā)明人
Yoshinori Ando
IPC分類
H01L27/12; H01L29/786; H01L29/66
技術領域
layer,transistor,insulating,electrode,in,109_1b,oxide,be,or,wiring
地域： Atsugi-shi, Kanagawa-ken

摘要

To provide a semiconductor device with high design flexibility. A first transistor and a second transistor having different electrical characteristics from those of the first transistor are provided over the same layer without significantly increasing the number of manufacturing steps. A semiconductor layer where a channel of the first transistor is formed and a semiconductor layer where a channel of the second transistor is formed are formed using semiconductor materials having different electron affinities. When an oxide semiconductor is used for the semiconductor layer, an insulating layer containing excess oxygen is used as an insulating layer below the semiconductor layer. By increasing the thickness of the insulating layer, a large amount of oxygen can be supplied to the semiconductor layer.

說明書

FIG. 38 is a configuration example of the first circuit 660. The first circuit 660 illustrated in FIG. 38 includes a signal processing circuit 661, a column driver circuit 662, and an output circuit 663. The signal processing circuit 661 includes a circuit 664 provided in each column. The circuit 664 includes a circuit 664a that can remove noise by a correlated double sampling (CDS) method (also referred to as a “CDS circuit”), a counter circuit 664b, and a latch circuit 664c. The circuit 664 has a function of analog-digital conversion. The signal processing circuit 661 can function as a column-parallel (column type) analog-digital conversion device.

The circuit 664a includes a comparator, a switch, and a capacitor. Two input terminals of the comparator are connected to each other via the switch. As the switch, a transistor, a microelectromechanical systems (MEMS) element, or the like may be used. One terminal of the comparator is connected to a wiring 667 via the capacitor. The other terminal of the comparator is connected to a wiring 623 that is provided in each column. Note that the other terminal of the comparator and the wiring 623 may be connected to each other via a capacitor.

權利要求

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