TY - GEN
T1 - Buckling analysis for a rectangular membrane for touch panel applications
AU - Chuang, C. H.
AU - Hong, R. C.
AU - Chen, K. S.
AU - Chen, C. C.
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/10/13
Y1 - 2014/10/13
N2 - Thin ITO-based PET conductive membranes are the major sensing structure in resistive touch panels for network phones or other applications. However, device failures or malfunctions such as early touch and disagreement between force-applied and touched locations have been reported. By examining the surface profiles, it was found that these membranes have considerable initial out of plane deformation. This could be a sign of membrane buckling since the clamped design could cause additional in-plane compression which could trigger the structural buckling. As a result, it is important to analyze the buckling behavior of ITO/PET membranes due to initial imperfection, residual stress, or assembly issues, for developing engineering solutions for quality assurance. In this work, both finite element analyses and essential experimental characterizations are performed as the first step toward solving this problem. However, it could be difficult for analyzing the complete membrane and its elastomer support structure in a single model. Rather, it is better to split the study into two interrelated models. That is, the first model is focused on studying the elastomer behavior due to assembly loads and the other model is for investigating the behavior of a thin rectangular plate subjected to various in- and out-of-plane loadings. In parallel, several experimental investigations have been conducted for characterizing material properties of the membrane, elastomer, and adhesion tapes, for supporting the above stress analysis. By both simulation and experimental investigations, the major control factor for causing malfunction of touch panel could be identified and the corresponding engineering solutions would be developed for enhancing the device reliabilities.
AB - Thin ITO-based PET conductive membranes are the major sensing structure in resistive touch panels for network phones or other applications. However, device failures or malfunctions such as early touch and disagreement between force-applied and touched locations have been reported. By examining the surface profiles, it was found that these membranes have considerable initial out of plane deformation. This could be a sign of membrane buckling since the clamped design could cause additional in-plane compression which could trigger the structural buckling. As a result, it is important to analyze the buckling behavior of ITO/PET membranes due to initial imperfection, residual stress, or assembly issues, for developing engineering solutions for quality assurance. In this work, both finite element analyses and essential experimental characterizations are performed as the first step toward solving this problem. However, it could be difficult for analyzing the complete membrane and its elastomer support structure in a single model. Rather, it is better to split the study into two interrelated models. That is, the first model is focused on studying the elastomer behavior due to assembly loads and the other model is for investigating the behavior of a thin rectangular plate subjected to various in- and out-of-plane loadings. In parallel, several experimental investigations have been conducted for characterizing material properties of the membrane, elastomer, and adhesion tapes, for supporting the above stress analysis. By both simulation and experimental investigations, the major control factor for causing malfunction of touch panel could be identified and the corresponding engineering solutions would be developed for enhancing the device reliabilities.
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U2 - 10.1109/ICEPT.2014.6922937
DO - 10.1109/ICEPT.2014.6922937
M3 - Conference contribution
AN - SCOPUS:84908100503
T3 - Proceedings of the Electronic Packaging Technology Conference, EPTC
SP - 1495
EP - 1498
BT - 2014 15th International Conference on Electronic Packaging Technology, ICEPT 2014
A2 - Bi, Keyun
A2 - Tian, Zhong
A2 - Xu, Ziqiang
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 15th International Conference on Electronic Packaging Technology, ICEPT 2014
Y2 - 12 August 2014 through 15 August 2014
ER -