Investigation of ink modification for aerosol jet printing process on FR-4 substrate
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ORIGINAL ARTICLE
Investigation of ink modification for aerosol jet printing process on FR-4 substrate Kuan-Yi Hung 1 & Yi-Tse Chang 1 & Chih-Hsuan Chien 1 & Chien-Fang Ding 2
&
Ming-Chih Tsai 3 & Hong-Tsu Young 1
Received: 12 June 2020 / Accepted: 28 September 2020 / Published online: 8 October 2020 # Springer-Verlag London Ltd., part of Springer Nature 2020
Abstract Non-contact, direct-write aerosol jet (AJ) printing technology using a variety of functional nanomaterial inks has been regarded as one of the most promising approaches for large-area additive manufacturing. The development and atomization of inks have a considerable effect on the printing quality. Therefore, in this study, the effect of a specific ratio of silver nanoparticle ink and a cosolvent of propylene glycol monomethyl ether (PGME) and ethylene glycol (EG) was investigated. The results indicated that the proportion of the solvent in the silver nanoparticle ink could affect the electrical characteristics of the printed lines. The prepared conductive ink with 95% silver nanoparticle ink and 5% co-solvent at a curing temperature of 180 °C demonstrated superior electrical conductivity and adhesion on the substrate. Keywords Aerosol jet printing . Printed circuit board . Co-solvent ink . Printed electronics . Conductivity
1 Introduction Printed circuit boards (PCBs) are required for the installation and interconnection of electronic components, which are an important carrier of all electronic components. With the rapid development of smart devices such as smartphones, smartwatches, and iPads, the demand for circuit boards as a carrier has also increased. Currently, the manufacturing of PCBs still depends on the lithography process for highresolution structures and mass production; however, the overall process is quite complicated. In addition, the consumption of chemicals in the lithography process is much greater than what it is required for a product. A large amount of chemical waste is also produced, which may cause environmental pollution with huge disposal costs. Moreover, due to the increasing demand for short life cycle electronic products, the types of materials and substrates in product design and development
* Chien-Fang Ding [email protected] 1
Department of Mechanical Engineering, National Taiwan University, Taipei 10617, Taiwan
2
National Applied Laboratories, Taiwan Instrument Research Institute, Hsinchu 30076, Taiwan
3
Academia Sinica, Institute of Chemistry, Taipei 11529, Taiwan
would constantly change. Therefore, a more flexible manufacturing approach is necessary. In recent years, printed electronic technologies have attracted increasing attention, such as roll-to-roll printing [1], screen printing [2], gravure printing [3], and inkjet printing [4]. In comparison with the lithography process [5], printed electronic technologies have the advantages of being cheap, flexible, highly efficient, and environmentally friendly. Therefore, many manufacturers have attempted to make use of these technologies to replace the t
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