New inkjet printing technology reduces OLED manufacturing costs

Another important concern for OLED manufacturers is the service life of displays, which may be negatively affected by oxygen and moisture in the air. Therefore, traditionally, deposition must be performed in a vacuum chamber to allow the material to isolate oxygen and moisture. However, inkjet printers cannot print in a vacuum, so other inkjet printer manufacturers have to operate in air, resulting in precision organic thin films being exposed to oxygen and moisture during the manufacturing process, seriously affecting the use of OLED life.

"Printing in the air itself will reduce the quality of the device," Madigan said.

In order to solve this problem, Kateeva first isolates the printer in a nitrogen atmosphere during the OLED manufacturing process, so that the life of the OLED display manufactured through the Yieldjet platform is expected to increase by two times.

The third key issue Kateeva claims to have solved is the uniformity of printing. As long as anyone who has ever used an inkjet printer knows that inkjet clogging may cause a discontinuous banding effect on the printed image, this will also have a serious impact on the manufacturing yield of OLED panels. However, Kateeva claimed that they have solved this problem through the learning experience of inkjet imprinting.

Madigan introduced: "We borrowed the algorithm used in the graphic arts industry (to improve the problem of unevenness in the nozzles of inkjet printers), and applied this algorithm in the OLED manufacturing process, directly monitoring our printing system All the nozzles in the machine allow us to know the amount of each drop flowing out of the nozzle at any time. "

Yieldjet is an eighth-generation printing machine that can print OLED display panels up to 2,500x2,200mm (98x86 ??) and small panels for flexible displays. Kateeva claims that the Yieldjet platform is currently used Several customers are expected to use OLED displays manufactured by Yieldjet after 2014.

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