Carbon nanotube thin-film transistor, AMOLED (active matrix organic light emitting diode) pixel flexible driving circuit and manufacturing method thereof

Abstract

A thin film transistor (TFT), AMOLED pixel flexible drive circuit and manufacturing method; the AMOLED pixel flexible drive circuit comprises a switching TFT and a driving TFT; both the switching TFT and the driving TFT comprise: a substrate (1), and a gate electrode (6), a source electrode (2), a drain electrode (3), an active conductive layer (4) and a dielectric layer (5) all formed on the substrate (1); the active conductive layer (4) is a carbon nano tube; and the drain electrode of the switching TFT is electrically connected to the gate electrode of the driving TFT. The carbon nano tube thin film transistor has a great mobility ratio and a high switch ratio, thus better satisfying the requirements on light emission of OLED pixels. In addition, the present invention realizes manufacturing of an AMOLED pixel drive circuit on a flexible substrate, has a simple process, easy operation, low costs and good repeatability, and is suitable for large-scale industrial production, thus establishing a foundation for large-area printing of a flexible display.

Description

technical field [0001] The invention belongs to the field of displays, in particular to a carbon nanotube thin film transistor and a manufacturing method thereof, an AMOLED pixel flexible driving circuit and a manufacturing method thereof. Background technique [0002] A general flat-panel display is composed of two basic parts, the display pixel and the driving circuit. In a liquid crystal display, the display pixels are an array of cells filled with liquid crystal material. The driver circuit is a transistor circuit that controls the switching (lighting, flipping) of each pixel. Organic Light Emitting Diode (OLED) has unique advantages such as high brightness, high contrast, ultra-light and ultra-thin, wide viewing angle, fast response, low power consumption, and all-solid-state. Therefore, it has received wide attention in the flat panel display industry and is considered to be the most likely display device to replace LCD. Its driving circuit is the same as LCD, and i...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a carbon nanotube thin film transistor and its manufacturing method, AMOLED pixel flexible drive circuit and its manufacturing method, which solves the problem of low transistor mobility in the prior art, which cannot meet the needs of OLED light emission, and the problem in the prior art. Active layer materials are difficult to deposit on flexible materials or cannot guarantee flexibility

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