Buckling in serpentine microstructures and applications in elastomer-supported ultra-stretchable electronics with high areal coverage.
Buckling in serpentine microstructures and applications in elastomer-supported ultra-stretchable electronics with high areal coverage.
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作者：
Zhang Y;Xu S;Fu H;Lee J;Su J;Hwang KC;Rogers JA;Huang Y
已经广泛探索了具有薄的、非连续的蛇形布局的光刻限定的电互连件以用于由弹性体衬底支撑的可拉伸电子器件。我们提出了一个系统的和彻底的研究，在这种可拉伸的蛇形微结构的屈曲物理，和超可拉伸电极的蛇形布局的战略设计，通过分析模型，有限元法（FEM）计算，和定量实验。屈曲和屈曲后的行为进行检查，以确定临界屈曲应变和弹性行为的限制的比例律。两个屈曲模式，即对称和反对称模式，识别和分析，与实验图像和数值结果，显示出显着的水平的协议相关的后屈曲过程。基于这些研究和优化的设计布局，我们展示了路线的应用蛇形互连在超拉伸电极，同时提供，面积覆盖率高达81%，和双轴拉伸性高达~170%。
Lithographically defined electrical interconnects with thin, filamentary serpentine layouts have been widely explored for use in stretchable electronics supported by elastomeric substrates. We present a systematic and thorough study of buckling physics in such stretchable serpentine microstructures, and a strategic design of serpentine layout for ultra-stretchable electrode, via analytical models, finite element method (FEM) computations, and quantitative experiments. Both the onset of buckling and the postbuckling behaviors are examined, to determine scaling laws for the critical buckling strain and the limits of elastic behavior. Two buckling modes, namely the symmetric and anti-symmetric modes, are identified and analyzed, with experimental images and numerical results that show remarkable levels of agreement for the associated postbuckling processes. Based on these studies and an optimization in design layout, we demonstrate routes for application of serpentine interconnects in an ultra-stretchable electrode that offer, simultaneously, an areal coverage as high as 81%, and a biaxial stretchability as large as ~170%.