Laser & Optoelectronics Progress, Volume. 60, Issue 19, 1914001(2023)

Effect of Pulse Duration on Laser-Induced Forward Transfer of Microdroplets

Shuaikang Cheng, Di Wu, Guohu Luo, and Yongxiang Hu*
Author Affiliations
  • State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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    Figures & Tables(10)
    Schematic of LIFT (a) process and (b) experimental setup
    Physical pictures of experimental (a) setup and (b) samples
    SEM images of donor copper film and receiving substrate under different pulse durations. (a) 14 ns; (b) 20 ns; (c) 30 ns; (d) 50 ns; (e) 100 ns
    Processing map of LIFT under different pulse durations
    SEM images of deposition microdroplets under different laser energy flux densities at pulse durations of 14 ns and 50 ns (sample rotated 55°). (a) 14 ns; (b) 50 ns
    Schematic of formation of deposition microdroplet morphology under short pulse duration. (a) Single droplet; (b) stacked droplet; (c) fused droplet
    Images of copper film and deposition microdroplet ablated by 20 ns, 4916 mJ/cm2 laser. (a) SEM image of copper film; (b) SEM image of deposition microdroplet; (c) confocal microscopy image of deposition microdroplet
    Material transfer rates under different pulse durations
    Large-scale microdroplet array. (a) SEM image of microdroplet array; (b) mesh matching diagram of deposition microdroplet and ablative pit; (c) landing errors of Δx and Δy
    • Table 1. Experimental scheme of LIFT

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      Table 1. Experimental scheme of LIFT

      No.Pulse duration /nsRepetition rate /kHzSpot size /μmSingle pulse energy /μJEnergy division
      11420198.65‒16.5010
      22020199.00‒19.3015
      33020198.84‒19.2021
      45020198.83‒22.5023
      510020198.92‒23.9021
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    Shuaikang Cheng, Di Wu, Guohu Luo, Yongxiang Hu. Effect of Pulse Duration on Laser-Induced Forward Transfer of Microdroplets[J]. Laser & Optoelectronics Progress, 2023, 60(19): 1914001

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    Paper Information

    Category: Lasers and Laser Optics

    Received: Nov. 9, 2022

    Accepted: Nov. 30, 2022

    Published Online: Sep. 25, 2023

    The Author Email: Hu Yongxiang (huyx@sjtu.edu.cn)

    DOI:10.3788/LOP223006

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