Parametric Study of Serpentine Electrode Shape for Stretchable Display

Abstract

The importance of display form factor is rapidly increasing in various display applications. As a result, shape deformable display evolves in terms of bendable, rollable and stretchable display. In particular, stretchable display is highly desirable and ideal due to its free and random shape transformability on various user and application demands. However, in order to fabricate realistic stretchable electronic device, technical challenge regarding how stable the electode under strain stress condition while maintaining high conductivity is crucial[1]. There are wo ways to fabricate stress-strain stavle electrode. One is to use intrinsically stretchable material such as conductive polymer.[2] Another appoach is to use conventional electrode material such as copper or aluminum and adjust eletrode shape structure. Considering that conventional electode materials in display lack stretchability, the materials provide good condcutivity in unstressed condition. Introdution of serpentine shape structure to conventional electrode material can effectivly allow good stretchable electric circuit connection. Since the effective extended stretchability is achieved by combining multiple shape parameters of sepentine electrode, shape paramatic analysis study of this sepentine electrode is highly demanding. In this study, we approached this analtical method to study serpentine electrode shape parameters and tried to figure out stable serpentine electode under stretching stress condition. From the four paramters analysed desing of sepentine electrode, computer based anlaytical study of strain-stress vulnerability is computed and anlaysed. In this study we report the parameterized alaytical stretchable sepentine electrode properties and suggest the better contioned serpentine shape design study in detail (Figure 1).