잉크젯 프린팅 기술을 이용한 Ag 전극 균일성 및 발열 센서 연구

Abstract

Inkjet printing technology is used to mass-produce displays and electrochemical sensors by dropping tens of pico-liters or less of specific-purpose ink through nozzles, just as ink is sprayed and printed on paper. Unlike the deposition method for vaporizing material ina vacuum, inkjet printing technology can be used for processing even under general atmospheric pressure and has a cost advantagebecause the material is dissolved in a solvent and used in the form of ink. In addition, because it can only be printed on the desired part,masks are not required. However, a technical shortcoming is the difficulty for commercialization, such as uniformity for forming thethickness and coffee ring effect. As sizes of devices decrease, the need to print electrodes with precision, thinness, and uniformityincreases. In this study, we improved the printing and processing conditions to form a homogeneous electrode using Ag ink (DGP-45LT15C)and applied this for patterning to fabricate a heat sensor. Upon the application of voltage to the heat sensor, the model with anextended width exhibited superior heat performance. However, in terms of sheet resistance, the model yielded an equivalent value of21.6 Ω/□ compared to the ITO.