Investigation on the Mechanical Behaviors of Flexible Film-Coated Substrates Subjected to Cycling Bending Loadings using Phase-Shifting Shadow Moire

• Main Authors: Shih-En Huang, 黃士恩
• Other Authors: 徐烱勛
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/99p4hz

碩士 === 國立虎尾科技大學 === 機械與機電工程研究所 === 100 === Although the flexible displays have the flexible advantages, the transparent conducting films (TCFs) deposited on the flexible substrates may generate cracks to degrade or even failure the displays. Accordingly, it is an important issue to investigate the mechanical behaviors of TCF-coated substrates. In this study, the mechanical behaviors as well as electrical properties of indium-tin-oxide (ITO)-coated on polyethylene terephthalate (PET) substrates subjected to cycling bending loadings were investigated. Different annealing temperatures were carried out to understand their influences on the tensile and compressive cycling bending loadings. A phase-shifting shadow moire (PSSM) were employed to measure the warpage and a four point probe was utilized to measure the sheet resistance of ITO films. In addition, to follow the relation between the deformation and resistance and time, the aforementioned properties were measured for 3 days after bending experiments. iv From the experimental results, it reveals that the warpage increases with increasing of bending time when the annealing temperature exceeds 80 ℃. Furthermore, the sheet resistance of ITO film considerably increases after the tensile bending loading. A microscopy was also used to observe the surface of ITO films to clarify the increasing reason of sheet resistance of ITO films.