Effect of the geometric parameters of elastomer substrates on the flexibility of stretchable electronics
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摘要: 柔性電子系統主要由有機基板和附著其上的金屬導體構成,系統組件的幾何參數對柔性電子系統延展性能影響很大,良好的尺寸設計可以優化系統的力學性能.本文研究了柔性基板的尺寸參數(長度,寬度,厚度)對柔性電子系統延展性的影響.用ABAQUS軟件對附著在不同幾何參數的共聚酯材料上的兩種結構銅導體進行單軸拉伸模擬實驗,以此來確定基板的尺寸參數對整個系統延展性的影響.通過對模擬結果進行分析發現,柔性基板長度的改變對系統拉伸變形影響很小,而柔性基板寬度或厚度的增加可以減小整個系統的變形,但是會加大金屬導體的應變,因此需要根據實際情況對尺寸參數進行合理設計.這項工作可以為柔性電子系統中基板的幾何設計提供幫助.Abstract: Stretchable electronics are mainly composed of the organic substrate and the metal thin conductor attached to the substrate. The geometric parameters of both substrate and metal conductor play an important role in the flexibility of stretchable electronics. In this paper,the effect of geometric parameters(length,width,and thickness of the substrate) on the flexibility of stretchable electronics was studied. The ABAQUS software was used to simulate the uniaxial tensile tests on the polyimide-supported copper conductor to determine the effects of geometric parameters of the substrate on its flexibility. As shown in the results,the effect of substrate length on the deformation of the system is very small; while the increase of width or thickness of the substrate can decrease the substrate deformation but increase the strain of metal conductor. This work can provide a theoretical support for the geometrical design of stretchable electronics.
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