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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, electric solid-state devices, semiconductor devices, etc., can solve problems such as high cost, difficulty in ensuring film uniformity, and complicated film-forming process, so as to reduce surface tension and improve Spreadability and effect of improving uniformity

Active Publication Date: 2018-07-31
GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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  • Claims
  • Application Information

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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

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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 preparation method of a printed display device, which comprises the steps of depositing a first electrode layer on a substrate; preparing a pixel defining layer on the firstelectrode layer, and forming a Bank structure and pixel pits; ink-jet printing functional layer ink in the pixel pits, ink-jet printing a second solvent on the top surface of the Bank structure, evaporating the second solvent in a sealed container, and performing steam treatment on the functional layer ink by the obtained steam of the second solvent, wherein the functional layer ink comprises a functional layer material and a first solvent; placing the device subjected to steam treatment in a room temperature condition, namely, an air environment or a nitrogen environment, for natural drying;then performing thermal treatment to form a functional layer; depositing an electron transport layer and a second electrode layer on the functional layer, and packaging to obtain the printed display device. The preparation method improves the uniformity of a thin film and the wettability of the functional ink and the pixel defining layer, ensures uniform spreading of the ink so as to play an effect of suppressing the leakage current, is simple and easy to implement and can substantially reduce the manufacturing difficulty and the manufacturing 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 Applications(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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