A few days ago, Seiko Epson invented a new technology called inkjet uniform film formation, which can make organic materials evenly deposited, which means that large-screen OLED TVs have the conditions for mass production, which is already wilting. The LCD TV market constitutes substantial pressure.
The process of forming a uniform film layer of organic material on a glass substrate is a key element in the production of OLED televisions. Currently, vacuum thermal evaporation (VTE) is one of the most widely used technologies. The process using this technique must be carried out in a vacuum chamber, requiring a visor to be placed next to the glass substrate to determine the pattern of deposited material on the substrate. However, vacuum thermal evaporation technology has several major drawbacks in the production of large-screen OLED TVs. For example, the visor is highly susceptible to offset by the high temperature environment in the process, making it difficult to maintain a uniform deposition rate on a large substrate.
Inkjet printing technology can form a thin film layer by uniform deposition of liquid organic materials. Therefore, this technology can theoretically better solve the size problem of large display screens. Epson uses the same drop-on-demand inkjet process as inkjet printers to accurately deposit organic materials in the right amount. Because inkjet systems have a very high material utilization rate, manufacturers can reduce production costs. In addition, when applied to the OLED TV production process, since there is no need to use a visor, the process steps will be less than the vacuum thermal evaporation technology, so the inkjet technology is expected to greatly increase the yield.
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