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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(shù)領(lǐng)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. 37A is a plan view illustrating a configuration example of the imaging device 610. The imaging device 610 includes a pixel portion 640, a first circuit 660, a second circuit 670, a third circuit 680, and a fourth circuit 690. In this specification and the like, the first circuit 660 to the fourth circuit 690 and the like may be referred to as a “peripheral circuit” or a “driver circuit”. For example, the first circuit 660 can be regarded as part of the peripheral circuit.

FIG. 37B illustrates a structure example of the pixel portion 640. The pixel portion 640 includes, for example, a plurality of pixels 645 (imaging elements) arranged in a matrix with p columns and q rows (p and q are each an integer greater than or equal to 2). Note that in FIG. 37B, n is a natural number of greater than or equal to 1 and smaller than or equal to p, and m is a natural number of greater than or equal to 1 and smaller than or equal to q.

權(quán)利要求

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