摘要
TFT-LCD端子区黏合玻璃芯片(COG)、柔性印刷电路板(FPC)时会出现显示异常,需要对集成电路(IC)进行返工并重新黏合,返工时异方性导电胶(ACF)去除液极易造成端子区腐蚀。实验对腐蚀位置进行扫描电子显微镜(SEM)表面像和断面像分析,确认了膜层结构与膜层厚度,验证了多种ACF去除液在不同时间的去除效率。实验表明,由于氧化铟锡(ITO)和M2刮伤,引起去除液渗透到各膜层,造成端子腐蚀,而采用G-430型去除液涂抹且静置1min后再用丙酮去除的方法,则可有效去除ACF且无腐蚀现象。该方法返工效率高,且棉签代替竹签操作方便,减少刮伤隐患,间接增强了端子耐腐蚀性能。
When TFT-LCD display becomes abnormal after terminal area bonding with chip on glass（COG）,flexible printed circuit（FPC）,it requires re-bonding the integrated circuit（IC） and anisotropic conductive film（ACF） removal fluid can easily lead to corrosion of the terminal area.In the experiment,the scanning electronic microscopy（SEM） surface image and cross-sectional image were used for the analysis of corrosion location,the film structure and thickness.The efficiency of various ACF removal fluids for different processing time was confirmed.The experimental results show that due to the scratch on indium tin oxide（ITO） ＆ M2,removal fluid is easy to penetrate into the layers after scratching,causing corrosion on the terminal.After applying G-430 removal fluid for 1 min,acetone can be removed.It can effectively remove the glue without corrosion.The efficiency is greatly improved.It is easy to operate with cotton swab instead of bamboo sticks for reducing the risk of scratches and enhancing the performance for the corrosion proof.
作者
高洪波
GAO Hongbo(Guangdong Shunde Industrial Design Institute（Guangdong Shunde Innovative Design Institute）,Foshan 528311,China;School of Electronics and Information Technology,Sun Yat-Sen University,Guangzhou 510006,China)
出处
《光学仪器》
2018年第3期71-75,共5页
Optical Instruments
