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5Mask Applied Extensively to All Production Lines
2001-01-14
Our productivity and Yield Ratio have been significantly increased since 5Mask was applied to each Photo Mask Process of all production lines in last June. As the most important of LCD manufacturing processes, the Photo Mask Process is the TFT forming process, which requires multi-coatings of thin film on a thin crystal plate by repeated sequential processes of Fine Cleaning, Thin Film, Affix, Photo, and Etche. 5Mask means the technology that reduces the number of Masks required for the Photo Mask Process into five (5). Reduction of Masks meant proportionate reduction of processes, which would finally result in enhancement of productivity and Yield Ratio. The current LCD manufacturing companies in general require 6-7 Masks, while domestic producers including LG.Philips LCD require 5 for the Photo Mask Process. Especially, succeeded in implementing 5Mask with the most minimum process in the LCD industry, we have made a remarkable contribution to improving the production. After applying 5Mask to the 370 mm x 470 mm line, we have achieved additional output of 18,000 units of 14.1 inch Model, which resulted in 20 % increase of productivity and 3-4 % increase of Yield Ratio, without new capital investment.
Since last June, 5Mask has been extensively applied to the 590x670mm line, which resulted in increases of the productivity and yield ratio by greater percentages, so that we could meet the increasing demand of 15.1 and 18.1 inch TFT-LCD for computer monitors in the market. Meanwhile, patents of the related technologies are pending.