纳米银油墨压电喷墨液滴成形及喷头驱动参数优化研究OA北大核心CSTPCD
Nano-silver ink droplet formation in piezoelectric inkjet printing and optimization of printhead driving parameter
为了有效消除单孔式压电喷墨喷头打印纳米银油墨时产生的卫星液滴,提高导电图案成形精度,采用集成式CCD相机观墨模块观测完整的液滴形成过程,研究了喷头驱动参数(包括驱动波的各阶段时间和电压)对腔内压力波的影响,以及驱动电压、液体粘度和表面张力对液滴形成过程中液线形态的影响.结果表明:在电压上升沿1时间2μs、波峰电压持续时间28μs、电压下降沿时间4μs、波谷电压持续时间11 μs、电压上升沿2时间2 μs,驱动电压45～55 V的喷头驱动参数下,喷头产生了理想的压力波并达到了无卫星液滴产生的稳定喷墨状态.液体粘度越小、表面张力越大,液线越容易破裂形成小液滴进而成为卫星液滴,可通过控制液线长度低于发生破裂的阈值从而抑制卫星液滴的产生.
In order to effectively eliminate the satellite droplets during the inkjet printing of nano-silver ink using single-hole piezoelectric printhead,so as to improve the forming accuracy of conductive pattern,the integrated CCD camera was used to observe the droplet formation process.The influence of the printhead driving parameters,such as the time and voltage of the driving waveform,on the pressure wave generated in the pressure chamber was investigated.The influence of the driving voltage,viscosity and surface tension of the ink on the morphology of the liquid line during droplet formation was also investigated.The results show that the ideal pressure wave and stable inkjet droplet without satellite can be obtained at the rise time 1 of 2 μs,peak voltage dwell time of 28 µs,fall time of 4 µs,trough voltage dwell time of 11 µs,rise time 2 of 2 μs,and voltage of 45-55 V.When lower viscosity and higher surface tension is applied,the liquid line is prone to break into small droplets and subsequently become satellite droplets.The formation of satellite droplets can be suppressed by controlling the length of the liquid line below the threshold length.
加泽贤;黄佳豪;吕景祥;李超;朱晨辉
长安大学工程机械学院,陕西西安 710064中国电子科技集团公司第二十研究所,陕西西安 710068||西安瑞特三维科技有限公司,陕西西安 710068西安瑞特三维科技有限公司,陕西西安 710068
电子信息工程
纳米银油墨驱动参数压力波卫星液滴液滴成形液线长度
nano-silver inkdriving parameterspressure wavesatellite dropletdroplet formationliquid line length
《电子元件与材料》 2024 (007)
845-852 / 8
国家重点研发计划(2022YFB4602800);西安市科技计划重点产业链关键核心技术攻关项目(23LLRH0079)
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