[11p-PA2-1~10] 1.3 Novel technologies and interdisciplinary engineering

▲ [11p-PA2-3] Design and fabrication of mechanical metamaterials for flexible electronic devices

〇Bongkyun Jang¹, Kwang-Seop Kim¹, Byung-Ik Choi¹, Jae-Hyun Kim¹, Hak-Joo Lee¹ (1.KIMM)

Keywords:Mechanical metamaterial, Flexible electronics, Thin film

Mechanical metamaterial is artificial structures with mechanical properties defined by their structures rather than their compositions. So far, a lot of examples of the mechanical metamaterials are suggested such as acoustic/phononic metamaterials, materials with negative poisson’s ratio, materials with negative longitudinal and volume compressibility transitions and penta mode metamaterials or meta-fluids [1]. In this study, we designed mechanical metamaterials for flexible electronic applications. Using finite element method, kirigami patterns are analyzed for design of flexible substrates. Numerical simulations demonstrate the deformation of flexible substrates. As a flexible substrate, we use polymeric sheet and we made kirigami patterns using laser cutting process. On the mechanical meta structure of flexible substrate, we transferred thin devices based on semiconducting materials.
[1] Zadpoor, A. A. Mechanical meta-materials, Mater. Horiz., 2016, 3, 371