摘要
纳米银导电油墨是目前应用较多的金属系导电油墨。由于织物、纸张、塑料等柔性电路基底耐热性差,印刷电路的低温烧结(<200℃)乃至室温烧结,已经成为研究热点。结合文献报道及课题组工作,本文讨论了纳米银及其制备技术;分析对比了几种低温烧结技术,重点考察了化学烧结。相对其他烧结技术,化学烧结适用范围广、操作简单、高效节能,通过配体交换法可得到电阻率为1.21×10^(-7)Ω·m的纳米银印刷电路;光子烧结时间短,效率高,但价格昂贵;电烧结选择性强,受制于电热转换;微波烧结具有较高的选择性,但耗时长,且烧结效果与纳米颗粒的大小密切相关;等离子体烧结要求真空条件,设备复杂,烧结时间长。总体上,选择具体印刷电路的低温烧结方式,要综合考虑导电油墨、印刷电路和基材等因素。
Nano silver conductive inks are currently the most widely used metallic conductive inks.Due to the poor heat resistance of flexible substrates such as fabrics,paper,and plastics,the low-temperature sintering(<200℃)and even room temperature sintering of printed circuits has become a hot topic in research.Combined with the literature report and the work of our group,nanosilver and its preparation technology were discussed,several low-temperature sintering techniques were analyzed and compared,especially the chemical sintering.Compared with other sintering technologies,chemical sintering has a wide range of applications,simple operation,high efficiency and energy saving.Nano silver printed circuits with a resistivity of 1.21×10^(-7)Ω·m can be obtained by the ligand switching method.The optical sintering time is short and the efficiency is high,but it is expensive.Electrosintering is highly selective and subject to electrothermal conversion.Microwave sintering has high selectivity,but takes a long time,and the sintering effect is closely related to the size of the nanoparticles.Plasma sintering requires vacuum conditions,complex equipment,and long sintering times.In general,the low-temperature sintering method of the specific printed circuit should be selected by comprehensively considering the factors such as conductive ink,printed circuit and substrate.
作者
李路海
刘媛琪
韩璐
曹梅娟
高波
莫黎昕
曹秀华
黄俊
沈跃桐
吴桢
LI Lu-hai;LIU Yuan-qi;HAN Lu;CAO Mei-juan;GAO Bo;MO Li-xin;CAO Xiu-hua;HUANG Jun;SHEN Yue-tong;WU Zhen(Beijing Printing and Electronic Engineering Technology Research Center,Beijing Institute of Graphic Communication,Beijing 102600,China;State Key Laboratory of Key Materials and Processes for New Electronic Components,Zhaoqing 526040,China)
出处
《印刷与数字媒体技术研究》
CAS
北大核心
2023年第2期10-21,共12页
Printing and Digital Media Technology Study
基金
北京市科委自然基金市教委重点课题(No.KZ202110015019)
风华高科新型电子元器件关键材料与工艺国家重点实验室开放课题(No.201909004)。
关键词
银纳米颗粒
低温烧结
保护剂
化学烧结
印刷电子
Silver nanoparticles
Low temperature sintering
Protective agents
Chemical sintering
Printing electronic
