am0c22867_si_004.mp4 (10.11 MB)
Download fileHigh-Efficiency Electrospray Deposition Method for Nonconductive Substrates: Applications of Superhydrophobic Coatings
media
posted on 2021-04-07, 18:36 authored by Md. Khalilur Rahman, Thanh Huy Phung, Soobin Oh, Se Hyun Kim, Tse Nga Ng, Kye-Si KwonWhen
highly insulating materials are used as substrates for electronic
devices, manufacturing yields become worse, and electronic components
are often damaged due to undissipated electrostatic charges on such
substrates. In the case of electrospray deposition, the problem of
undissipated charges is particularly vexing. If charges accumulated
on the substrate are not properly compensated, a repulsive force is
generated against the incoming charged droplets, which negatively
affects the uniformity and deposition rate of the coating layer. In
order to overcome this limitation, we demonstrated a new electrospray
method, which can significantly increase the deposition efficiency
even in the presence of accumulated charges on nonconductive substrates.
A highly reliable superhydrophobic layer was uniformly deposited on
highly insulating substrates, including printed circuit board (PCB),
polyester (PET), and polyimide (PI) substrates.