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Fabrication of 3D embedded hollow structures inside polymer dielectric PMMA with femtosecond laser

机译:飞秒激光在聚合物电介质PMMA内制造3D嵌入式空心结构

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摘要

Recent progresses in femtosecond laser (fs) manufacturing have already proved that fs laser is a powerful tool in three dimensional internal structure fabrications. However, most studies are mainly focused on realize such structures in inorganic transparent dielectric, such as photosensitive glass and fused silica, etc. In this study, we present two methods to fabricate embedded internal 3D structures in a polymer dielectric material polymethyl methacrylate (PMMA). Both continuous hollow structure such as microfluidic channels and discrete hollow structures such as single microcavities are successfully fabricated with the help of femtosecond lasers. Among them, complicated 3D microchannel with a total length longer than 10mm and diameters around 80μm to 200μm are fabricated with a low repetition rate Ti: sapphire femtosecond laser by direct laser writing at a speed ranging from 25μm/s to 2000μm/s; microcavities which function as concave microball lenses (CMBLs) and can be applied in super-wide-angle imaging are fabricated with a high repetition rate femtosecond fiber laser due to the distinct heat accumulation effect after 5s irradiation with the tightly focused fs laser beam. These new approaches proved that femtosecond laser direct writing technology has great application potential in 3D integrated devices manufacturing in the future.
机译:飞秒激光器(fs)制造的最新进展已经证明,fs激光器是三维内部结构制造中的强大工具。但是,大多数研究主要集中于在无机透明电介质中实现这种结构,例如光敏玻璃和熔融石英等。在这项研究中,我们提出了两种在聚合物电介质材料聚甲基丙烯酸甲酯(PMMA)中制造嵌入的内部3D结构的方法。 。在飞秒激光器的帮助下,连续的空心结构(如微流体通道)和离散的空心结构(如单个微腔)都可以成功制造。其中,复杂的3D微通道的总长度超过10mm,直径大约为80μm至200μm,并通过直接激光写入以25μm/ s至2000μm/ s的速度通过低重复率的Ti:蓝宝石飞秒激光器制造;由于使用紧密聚焦的fs激光束照射5s后具有明显的蓄热效果,因此使用高重复率的飞秒光纤激光器制造了可用作凹面微球透镜(CMBL)且可用于超广角成像的微腔。这些新方法证明了飞秒激光直接写入技术在未来3D集成设备制造中具有巨大的应用潜力。

著录项

  • 来源
    《Advanced laser processing and manufacturing》|2016年|1001804.1-1001804.7|共7页
  • 会议地点 Beijing(CN)
  • 作者单位

    Institute of Laser Engineering, Beijing University of Technology, Pingleyuan 100, Chaoyang District, Beijing 100124, P. R. China,Science and Technology on Optical Radiation Laboratory, Beijing, 100854, P. R. China,Department of Mechanical, Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, Tennessee 37996, U.S.A.;

    Institute of Laser Engineering, Beijing University of Technology, Pingleyuan 100, Chaoyang District, Beijing 100124, P. R. China;

    Department of Mechanical, Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, Tennessee 37996, U.S.A.;

    Institute of Laser Engineering, Beijing University of Technology, Pingleyuan 100, Chaoyang District, Beijing 100124, P. R. China;

    Science and Technology on Optical Radiation Laboratory, Beijing, 100854, P. R. China;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    femtosecond laser; PMMA; internal manufacturing; microchannel; concave microball lens (CMBL); integrated device; microfluidic chip;

    机译:飞秒激光PMMA;内部制造;微通道凹面微球镜(CMBL);集成设备微流控芯片;

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