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Research of laser bonding for display device
- Chinese Journal of Liquid Crystals and Displays Vol. 35, Issue 12, Pages: 1258-1263(2020)
- 作者机构：
京东方科技集团股份有限公司, 北京 100176
- 作者简介：
- 基金信息：
DOI：10.37188/YJYXS20203512.1258
CLC： TN141.9Received：02 May 2020，
Revised：19 August 2020，
Accepted：19 August 2020，
Published：2020-12
- 稿件说明：
移动端阅览
Li-li WANG, Chao LIU, Yue-sheng SONG, et al. Research of laser bonding for display device[J]. Chinese journal of liquid crystals and displays, 2020, 35(12): 1258-1263.
Li-li WANG, Chao LIU, Yue-sheng SONG, et al. Research of laser bonding for display device[J]. Chinese journal of liquid crystals and displays, 2020, 35(12): 1258-1263. DOI： 10.37188/YJYXS20203512.1258.
摘要
随着显示技术的不断发展，全面屏显示愈发受到市场的欢迎和追捧。为了最大限度降低产品边框、提高显示产品的屏占比，本文研究了激光固化各向异性导电胶膜（Anisotropic Conductive Film，ACF）来实现显示器件绑定的新技术。通过对TFT的电极压痕、粒子形变量、ACF反应率、拉拔力和产品信赖性等测试，发现激光绑定是一项实际可行的显示器件绑定技术。本文进行了激光绑定技术优势验证，得到：（1）最小热损伤距离，相比较传统热压绑定技术，热损伤安全距离由0.75 mm降低至0.15 mm，极大地缩短了IC/COF到偏光片的距离，避免了偏光片烫伤内缩影响显示。（2）降低量产生产节拍时间，由于激光能量均匀集中，且直接加热ACF，使得ACF固化速度更快，在现有ACF条件下，本压时间可由5 s降低至3 s，大幅度加快生产节拍，提高产品的生产效率。可见，激光绑定既可以解决热压工艺瓶颈，实现极致窄边框显示器的绑定，又能降低生产节拍时间，提高生产效率，是一种非常有前途的新技术。
Abstract
With the continuous development of display technology
the comprehensive screen display has become highly sought-after by the market. In order to minimize the display border and improve the screen share of display products
a new technology of laser curing anisotropic conductive film (ACF) is studied to achieve the display bonding. Through the tests of TFT electrode indentation
particle deformation
ACF reaction rate
ACF die shear and product reliabilities
it is found that laser bonding is a viable bonding technology. In this paper
the experiments are designed to verify the advantages of laser bonding technology. Conclusions are as follows:(1)Compared with hotbar bonding technology
the safety distance of thermal is reduced from 0.75 mm to 0.15 mm
which greatly shortens the IC/COF to polarizer(POL) distance and avoids the shrinkage of POL scald. (2)Because of its concentrated laser beam and directly ACF cured
the main bonding time is reduced from 5 s to 3 s
which greatly speeds up the production takt time and improves the efficiency. All results show that laser bonding is a very promising new technology.
关键词
Keywords
references
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