Organic thin film transistor, preparation method and preparation device thereof

Abstract

The invention relates to the field of liquid crystal display and discloses an organic thin film transistor, a preparation method and a preparation device thereof. The preparation method for the organic thin film transistor comprises the steps that a grid electrode, a grid insulation layer, an organic semiconductor layer, a source electrode and a drain electrode are formed on a substrate; the organic semiconductor layer forming procedures include that a solution in which an organic semiconductor material used for forming the organic semiconductor layer is dissolved is subjected to blade coating, so that the organic semiconductor layer is formed. By adopting the technical scheme of the invention, in the blade coating process, the transverse shearing force applied on the solution in each row or column of the substrate is consistent, the thickness of the solution formed through the blade coating is consistent, the state of each device is equal, the difference between the edge and the center of the substrate, caused by centripetal force with the adoption of the rotary coating technique is avoided, and the defect-free rate of the organic thin film transistor devices is improved.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to an organic thin film transistor, a preparation method thereof, and a preparation device. Background technique [0002] Organic Thin Film Transistor (OTFT for short) is a semiconductor device that uses organic materials instead of traditional silicon semiconductor materials. Compared with silicon-based materials, organic materials are difficult to process and cost high. However, organic materials can be prepared into solutions and semiconductor devices can be prepared under mild conditions. Therefore, they have attracted more attention and have become the core link in the next generation of display technology. At present, many display giants such as Samsung and Sony have begun to develop integrated circuits based on organic thin film transistors. Organic thin film transistors have also become an indispensable technical component in foldable displays and panoramic d...

AI Technical Summary

Problems solved by technology

Another point, the spin coating method will throw off most of the solution, resulting in waste of raw materials

In addition, the spin-coating method is also difficult to apply to flexible substrates

Based on the above factors, this preparation method is difficult to achieve industrial application

[0007] The defect of the prior art is that, using the spin-coating process, the difference between the linear speed at the center of the substrate and the linear speed at the edge of the substrate leads to a large drop between the center and the edge, and poor uniformity, which makes the crystallization direction of the semiconductor material chaotic, resulting in device low yield

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