Open AccessElectric characterisation of fine wires formed with capillary‐effect‐based screen‐printing
Author(s) -
Hokari Ryohei,
Kurihara Kazuma,
Takada Naoki,
Matsumoto Junichi,
Matsumoto Sohei,
Hiroshima Hiroshi
Publication year - 2016
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2016.0269
Subject(s) - materials science , electrical conductor , screen printing , inkwell , capillary action , aspect ratio (aeronautics) , composite material , electrical resistance and conductance , line width , optoelectronics , nanotechnology , optics , physics
To improve the productivity of electronic devices, it is imperative to develop screen‐printing techniques that can form finer wires with a higher‐aspect ratio. The electric characteristics of conductive wires formed by the proposed screen‐printing process combined with an imprinting technique were evaluated. Fine wires with a high‐aspect ratio can be realised, owing to the capillary force of parallel‐walled structures (PWSs) on polymer films. With the proposed process, printed wires with a line width of only 7.0 µm and an aspect ratio of up to 8.6 were obtained. To optimise the shape of the PWS, the dependence of the shape of PWSs was evaluated electrically. They compared the electric resistance of wires with a width of 10 µm formed using the proposed process to that of 81 µm wires formed using a conventional process. The measured resistance was almost the same, at around 54 kΩ/mm, despite the fact that the proposed process realised wires that were an eighth of the width. By controlling the printing conditions, they confirmed that capillary‐effect‐based screen‐printing is also feasible using highly conductive ink. The resistance of a 13 µm wide printed wire achieved 3.0 Ω/mm.