Some Technologies in OLED Screen Manufacturing

Vapor deposition technology

Vapor deposition is the evaporation of vaporized materials into atoms or molecules in a vacuum by electric current heating, electron beam bombardment heating and laser heating, etc. They then move in a linear motion with a large free range and collide with the surface of the substrate to condense and form a thin film.

In fact, vapor deposition is indeed a major reason for the high cost of OLED screens. Such complex structures are impossible to micro-sculpt by hand. If these structures are put into practice, it is a matter of manufacturing process.

Preparation process

OLED because of its simple structure, so the production process is not as complicated as the LCD manufacturing process. However, because the OLED process equipment is still in the stage of continuous improvement, there is no unified standard mass production technology.

People should not only improve the performance of materials and enrich the variety of materials from the basis of the composition of the device; but also in-depth understanding of the physical process of the device and the internal physical mechanism, targeted improvement of the structure of the device to improve the performance of the device.

Film-forming technology

The preparation of OLED materialsincludes organic small molecules, polymers, metals and alloys. Most organic small molecule films are prepared by vacuum thermal evaporation, while soluble organic small molecule and polymer films can be prepared by the simpler, faster and lower cost solution method. Researchers have also developed solution preparation methods based on liquid metals such as conductive silver paste brushing in order to achieve full solution preparation of OLEDs.

Cathode process

Traditional cathode preparation method is to solid block, strip or filamentary silver, magnesium, aluminum and other metals by vacuum thermal vapor deposition with metal mask plate to get the desired film pattern. In recent years, due to the simple preparation process and low cost of equipment, the rapid development of wet preparation technology is moving toward the industrialization of mass production. Among them, silver nanoparticles are the research hotspot for wet preparation of electrodes.

Some of the Photoresist materials

Packaging Technology

Improving the lifetime of OLEDs to a commercial level is one of the key issues to achieve the industrial development of OLEDs, while water, oxygen and dust in contact with the electrodes will lead to bubbles in the electrodes of OLEDs, accelerating the aging of the devices and reducing the stability of OLEDs. Through the device packaging to isolate water and dust is an effective way to improve the life of OLED. At present, the commonly used encapsulation techniques include glass or metal cover encapsulation, thin film encapsulation, indium sealing, fusion block fusion sealing, etc.

What can I do

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