A Novel Method to Fabricate a Thick-Film Cu Electrode Fired in Air Through Printing Al Electrode and Reduction-Oxidation Substitution Reaction

Kuo, Tzu-Chiang; Kuo, Ching-Ming; Lee, Wen−Hsi

doi:10.1109/tcpmt.2021.3049495

Cited by 3 publications

(1 citation statement)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this work, a cost-efective aluminum paste is used in place of the prohibitively expensive nanosilver paste and other copper paste substitutes that are typically used in classic thick flm processes [6,7]. Te most abundant metal on Earth (after silicon and oxygen) is aluminum, which is printed onto a fexible PET substrate sheet using an epoxy resin paste [8,9]. However, since the Al paste with epoxy resin is nonconductive, the thick flm aluminum electrode, which was screen printed and had a higher oxidation potential, was immersed in an aqueous solution of CuSO 4 for a certain duration.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of a Flexible RFID Antenna by Using the Novel Environmentally Friendly Additive Process

Divya,

Lee

2023

International Journal of Antennas and Propagation

Self Cite

View full text Add to dashboard Cite

The fabrication of flexible antennas for RFID applications can be divided into subtractive and additive methods. In this study, a low-cost additive method is proposed, which involves printing aluminum paste and utilizing a galvanic replacement reaction. Through a galvanic replacement process, copper sulfate waste effluent was employed to convert the aluminum electrode into a highly conductive copper electrode. The physical characteristics of the Cu electrode, such as surface flatness, thickness, and Al-Cu conversion ratio, were studied. The Cu electrode, produced using an innovative additive technique at a temperature of 75°C for 15 minutes, exhibits the lowest resistivity of 5.89 × 10–8 Ωm. This resistivity is comparable to that of a commercial silver thick film electrode, making it suitable for use in manufacturing RFID antennas for RFID module applications. With an S11 of −40 dB at 1.26 GHz, a maximum gain of 2.87 dBi, a maximum efficiency of 53.63%, and a reading distance of 9 meters, the RFID module demonstrates impressive performance. The reading distance of an RFID module with a copper foil antenna is longer (8.5 meters).

show abstract