| Summary: | 碩士 === 國立臺北科技大學 === 化學工程研究所 === 98 === It will be studied that how to reduce the cost of one chip in TFT-LCD industry. So, everyone work hard to reach the goal from the processes of TFT-LCD. Main processes of TFT-LCD contain Array & CF,Cell and Module. It is the composition of Cell that TFT and CF attached by polarizer. In attaching process, if particle exists between them, it will be found after voltage inspection.
It is the repairing process that Remove and re-attach polarizer now. Particle issue will be a bright point. If it is over product specification, polarizer will be into the repairing process. So, I want to save materials. Resin BM is opaque. I try to repair polarizer by resin BM and use UV curing it. Bright point becomes dark after them. The best parameter of UV curing is as below after experimental results.
UV height:2 mm
UV illumination:1050 mW/c㎡
UV curing time:60 seconds
After them, I pay attention to appearance of the polarizer, it is no problem. At the same time, High adhesive force exists between polarizer and resin BM.
The distance of top defect and backlight is far than bottom defect and backlight. It may be the gap concern. So, new repairing process for top is as below: Laser treatment→INK repair by resin BM→UV curing. After them, top defect comes close to resin BM more.
When using laser treatment on polarizer, laser energy is direct relative to laser shot. The best parameter of laser function is as below after experimental results. 13.3”Sumika polarizer:Laser wavelength:266 nm, laser energy:0.35 mJ, laser shot: 100 shots. PVA layer is broken by the best parameter of 13.3”Sumika polarizer. The depth is about 50~60 um. 19”Display:Laser wavelength:266 nm, laser energy:0.5 mJ, laser shot: 100 shots. 32”Display:Laser wavelength:266 nm, laser energy:1 mJ, laser shot: 100 shots. Laser energy will strengthen if polarizer size becomes bigger.
Laser energy and laser shot need to change when using different polarizer. In order to reduce laser shot, HC and TAC layers can be the treatment by different laser energy. In the opposite way, TAC layer can be treated with low laser energy after high laser energy versus HC layer. If the depth of laser treatment is bigger, high adhesive force exists between polarizer and resin BM. At the same time, I clean resin BM on polarizer with surfactant. Resin BM has not come off the polarizer. All my repairing tests are based on protecting polarizer.
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