Fabrication Technology Development of NFC Antenna on flexible substrate by inkjet printing method of conductive ink

• Main Author: MELIOLLA - NIM: 23216334 , GRASIA
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/27577
• Institution: Institut Teknologi Bandung

Near field communication (NFC) is a form of wireless communication technology that allows data transfer by placing two devices within close distance. The main idea behind NFC is to integrate wireless payment method and tag reading on cell phones along with peer-to-peer communication. One benefit of NFC peerto-peer communication is to quickly set up a Bluetooth or WLAN connection by a simple swipe motion. Wireless payments are also possible through card emulation mode. This allows NFC devices to be used in wireless payment terminals and to replace contactless plastic cards in RFID (radio frequency identification) infrastructure. Inkjet printing is a technology that can be applied along with conductive inks to form conductive pattern and electronic structures of NFC antennas. This printing method also potentially can be used on various substrates including flexible ones. The use of flexible substrates has also been investigated intensively because of the increasing demand for electronic devices which are cheap, environmentally friendly, wireless and have various functions. This research was carried out with the aim of developing techniques that could enable the design and fabrication of NFC antenna systems over flexible surfaces. The inkjet printing method is chosen as the main tool that enables this aim to be achieved because it is a non-contact process, a free form fabrication technique, and an additive process, thus electronic structures can be generated and not machined or etched. This method potentially can reduce many steps of the process and minimize material waste. Conductive ink has also been developed from silver nanoparticles (Ag). Coating of silver ink through inkjet printing can be applied to realize the function of NFC antennas on flexible PCB material. In this study, we conduct research on inkjet printing technique, conductive material for inkjet ink, polymer substrate for electronic circuit applications, and droplet interaction with the substrates. In addition, the design and fabrication of NFC antenna structures on flexible substrate such as polymide by silver ink inkjet printing are also conducted. The structure printed is then measured in terms of <br /> <br /> <br /> <br /> <br /> <br /> adhesion, conductivity, and RF characteristics. The measurement results obtained are then compared with the simulation results of the NFC antenna structure characteristics using MATLAB software.