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Preparation method of printed display device

A printing display and device technology, which is applied in semiconductor/solid-state device manufacturing, semiconductor devices, electric solid-state devices, etc. Effect of improving surface tension and spreadability

Active Publication Date: 2019-03-29
GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to solve the problems of complex film-forming process, high cost and difficulty in ensuring film uniformity in the prior art. The preparation method of the printed display device

Method used

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  • Preparation method of printed display device
  • Preparation method of printed display device
  • Preparation method of printed display device

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Experimental program
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Embodiment

[0039] See image 3 , a method for preparing a printed display device in this embodiment, comprising the following steps:

[0040] S1. Depositing a first electrode layer on the substrate;

[0041] S2. Prepare a pixel defining layer on the first electrode layer and form a Bank structure and a pixel pit; the pixel defining layer in this embodiment has a liquid-repellent property, and it is not necessary to carry out hydrophilic treatment on the structure of the pixel defining layer to ensure that Film formation uniformity;

[0042] S3. Inkjet print the functional layer ink in the pixel pit, inkjet print the second solvent on the top surface of the Bank structure, evaporate the second solvent in a sealed container, and use the vapor of the obtained second solvent to treat the functional layer. A layer of ink is subjected to steam treatment, and the functional layer ink includes a functional layer material and a first solvent;

[0043] Place the steam-treated device at room tem...

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Abstract

The invention discloses a method for preparing a printed display device: depositing a first electrode layer on a substrate; preparing a pixel defining layer on the first electrode layer and forming a Bank structure and a pixel pit; inkjet printing in the pixel pit Functional layer ink, inkjet printing a second solvent on the top surface of the Bank structure, evaporate the second solvent in a sealed container, and use the vapor of the obtained second solvent to steam treat the functional layer ink, the functional layer The ink includes a functional layer material and a first solvent; placing the steam-treated device at room temperature, air environment or nitrogen environment to dry naturally; then performing heat treatment to form a functional layer; depositing an electron transport layer on the functional layer and The second electrode layer is packaged to obtain the printed display device. The invention improves the uniformity of the film and the wettability of the functional ink and the pixel defining layer, ensures the uniform spreading of the ink and thereby suppresses leakage current generation, is simple and easy to implement, and can greatly reduce manufacturing difficulty and cost.

Description

technical field [0001] The invention relates to the technical field of display preparation, in particular to a preparation method of a printed display device. Background technique [0002] Solution processing technology has good development prospects because it does not require expensive vacuum equipment and can realize low-cost, large-area, large-scale, and high-efficiency production of OLED and QLED displays. Among them, the inkjet printing technology not only realizes the colorization of the display screen without a mask by selectively depositing functional inks in the corresponding pixels, but also greatly improves the utilization rate of materials, and is considered to be the most capable of promoting large-scale printing. Patterned film-forming technology for the industrialization of large-area flexible full-color displays. However, inkjet printing requires a process of desolventization and drying to form a film, and this process determines the quality of the film. U...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/32H01L51/56
CPCH10K59/122H10K59/123H10K71/00
Inventor 董婷
Owner GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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