Open AccessStretchable anisotropic conductive film (S-ACF) for electrical interfacing in high-resolution stretchable circuits
Author(s) -
Hong Jin Hwang,
Minsik Kong,
Kyung-Hwan Kim,
Doo-Won Park,
Sangyeop Lee,
SooJin Park,
Ho-Jin Song,
Unyong Jeong
Publication year - 2021
Publication title -
science advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.928
H-Index - 146
ISSN - 2375-2548
DOI - 10.1126/sciadv.abh0171
Subject(s) - interfacing , materials science , electrical conductor , stretchable electronics , electronic circuit , optoelectronics , nanotechnology , anisotropy , electrical engineering , computer science , composite material , optics , electronics , physics , computer hardware , engineering
In stretchable electronics, high-resolution stretchable interfacing at a mild temperature is considered as a great challenge and has not been achieved yet. This study presents a stretchable anisotropic conductive film (S-ACF) that can electrically connect high-resolution stretchable circuit lines to other electrodes whether they are rigid, flexible, or stretchable. The key concepts of this study are (i) high-resolution (~50 μm) but low-contact resistance (0.2 ohm in 0.25 mm 2 ) interfacing by periodically embedding conductive microparticles in thermoplastic film, (ii) low-temperature interfacing through the formation of chemical bonds between the S-ACF and the substrates, (iii) economical interfacing by selectively patterning the S-ACF, and (iv) direct interfacing of chips by using the adhesion of the thermoplastic matrix. We integrate light-emitting diodes on the patterned S-ACF and demonstrate stable light operation at large biaxial areal stretching (ε xy = 70%).