A new inkjet technology has been invented by Seiko Epson Corp and this new technology allows a uniform deposition of organic material in the production of large-screen organic light-emitting diode (OLED) TVs.
Reportedly, this new technology reflects a big leap toward the creation of 37-inch and larger full-HD OLED TVs by resolving the uneven layering that had previously been an issue with the inkjet method.
Seiko Epson said this OLED display fabrication process leverages the company’s proprietary Micro Piezo inkjet technology to achieve greater accuracy in organic material deposition than the conventional technology. The process has been used in trial production to fabricate a highly uniform prototype panel.
It said that extremely uniform layers (volume error <1%) are achieved by precisely controlling the selection and ejection of multi-size droplets of ink material on a substrate so that only the required volume of material is deposited.
Theoretically, an inkjet printing process is the better solution for larger display sizes because it enables thin-film layers to be formed via the deposition of liquid organic materials.
Using the same drop-on-demand approach as an inkjet printer, Epson’s process accurately deposits organic materials in the precise locations and amounts required.
Inkjet systems use materials that are extremely efficiently, so manufacturers are able to reduce cut production costs. Used as an OLED TV fabrication system, inkjet technology - which does not require masks and thus involves fewer process steps than VTE - is widely expected to raise production throughput.
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