TFT-LCD的Line Zara失效机制及改善

Chinese Journal of Liquid Crystals and Displays(2019)

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Abstract
为了彻底改善TFT-LCD的Line Zara不良,本文建立了Line Zara失效模型,并分析了Line Zara失效机制,其中Line Zara发生率与外力大小及玻璃弯曲形变程度成正比,与框胶至柱状隔垫物距离、框胶粘结力成反比.基于Line Zara的失效机制,针对性地提出了改善措施并进行了实验验证.实验结果表明,减薄时的抛光工艺、减薄后运输箱的填充密度和框胶粘结力对Line Zara有显著的影响.随着抛光压力的减小和时间缩短,Line Zara发生率逐渐减少.随着运输箱中玻璃数量或隔垫物数量的增加,运输箱的填充密度逐渐增大,玻璃受外力发生的弯曲形变逐渐减小,相应的Line Zara发生率逐渐减小;当隔垫物为无尘纸时,玻璃的弯曲形变最小,Line Zara发生率最低.此外,当框胶与ITO粘结力增加12.5%、与PI粘结力增加66%后,Line Zara的发生率可降低至2%以下.TFT-LCD的Line Zara不良可通过降低抛光压力与时间、增加运输箱的填充密度和增加框胶粘结力彻底改善.
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Key words
TFT-LCD, Line Zara, failure mechanism, bending deformation, polishing process, packing density, sealant adhesive strength
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