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<p>This study employed the UV imprinting technology utilizing SU-8 as the photoresist. The curved imprinting and the square incurved Negative Poisson’s Ratio (NPR) structures were utilized to manage the deformation of the polydimethylsiloxane (PDMS) microstructure mold. The Poisson’s ratio of the microstructure was analyzed through the variation of curvature and NPR structures. The ANSYS software used finite element analysis to simulate the NPR structure’s effect on the mold. Geometric parameters of the NPR structure were adjusted to optimize regulation and control, and the optimal parameters were identified. Subsequently, leveraging the rapid prototyping capabilities of 3D printing, a self-designed NPR control mold was manufactured. The relationship between the microstructure and the NPR structure was investigated across different curvatures and NPR variations. The results, derived using specific equations, facilitated the creation of a highly flexible curved mold capable of controlling deformation proportions. These findings are expected to be utilized in producing micro-optical structure components, such as backlight modules for curved screens and flexible displays, offering the advantages of high flexibility and rapid manufacturing.</p>

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Development of a Poisson effect-assisted replication process for UV-curable curved microstructure components

  • 期刊论文

  • 发表日期：

    2025年8月18日

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  • Zi-Jia Wang,
  • Yung-Jin Weng

摘要

This study employed the UV imprinting technology utilizing SU-8 as the photoresist. The curved imprinting and the square incurved Negative Poisson’s Ratio (NPR) structures were utilized to manage the deformation of the polydimethylsiloxane (PDMS) microstructure mold. The Poisson’s ratio of the microstructure was analyzed through the variation of curvature and NPR structures. The ANSYS software used finite element analysis to simulate the NPR structure’s effect on the mold. Geometric parameters of the NPR structure were adjusted to optimize regulation and control, and the optimal parameters were identified. Subsequently, leveraging the rapid prototyping capabilities of 3D printing, a self-designed NPR control mold was manufactured. The relationship between the microstructure and the NPR structure was investigated across different curvatures and NPR variations. The results, derived using specific equations, facilitated the creation of a highly flexible curved mold capable of controlling deformation proportions. These findings are expected to be utilized in producing micro-optical structure components, such as backlight modules for curved screens and flexible displays, offering the advantages of high flexibility and rapid manufacturing.