柔性基底导电银墨水喷墨打印工艺分析  

Inkjet-Printing Process Analysis of Conductive Silver Ink on Flexible Substrates

作　　者：曹威武 潘开林[1] 韩旭峰[1] 李婷婷[1] 王文佳[1] Cao Weiwu Pan Kailin Han Xufeng Li Tingting Wang Wenjia(School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology , Guilin 541004, China)

机构地区：[1]桂林电子科技大学机电工程学院,广西桂林541004

出　　处：《微纳电子技术》2017年第11期787-790,共4页Micronanoelectronic Technology

基　　金：国家自然科学基金资助项目(61474032);广西研究生教育创新计划资助项目(YCSW2017135)

摘　　要：以银导电墨水为打印墨水材料,以热塑性聚氨酯弹性体橡胶(TPU)薄膜为柔性基底材料,通过压电式材料喷墨打印机在柔性基底上打印导电膜图形。通过光学显微镜对基底材料表面打印银墨水状态观察发现:基底表面亲水处理可以有效提高基底对银墨水的吸附力;柔性薄膜适当的预拉伸有利于提高薄膜平整度,提高墨水打印导电膜图形的质量;墨滴质量、喷嘴状态及喷嘴和基底薄膜的间隙校正是保证打印均匀性的关键;在烧结工艺中,采用逐渐提高温度的方式,可达到逐渐释放热应力的目的,减少由于温度剧变对TPU薄膜表面银墨图形结构产生变形或龟裂的现象,可有效地提高烧结后所形成导电图案的完整性和连续性。Conductive film pattern was printed on the flexible substrate through the piezoelectric material inkier printer with the conductive silver ink as printing ink material and the thermoplastic polyurethanes （TPU） film as flexible substrate material. The state of the printed silver ink on the substrate surface was observed through the optical microscope. It is found that the hydrophi- lic treatment on the substrate surface can effectively improve the adsorbability of the substrate for the silver ink. The appropriate pre-stretching of the flexible film is helpful to improve the smoothness of the film and the printed quality of the ink transformed into the conductive film pat- tern. The ink drops quality, nozzle state and correction of the clearance between the nozzle and substrate film are the keys to guarantee the printing uniformity. The method of gradually increa- sing temperature in the sintering process can achieve the goal of gradually releasing the thermal stress, reduce the deformation or cracking phenomenon of the silver ink pattern structure on the surface of the TPU film caused by temperature drastic change, and effectively improve the integ- rity and continuity of the sintered conductive pattern.

关 键 词：喷墨打印 银墨水 柔性基底 薄膜 烧结 

分 类 号：TS801.4[轻工技术与工程]