Control of surface wettability for inkjet printing by combining hydrophobic coating and plasma treatment

We have obtained a wide range of surface wettabilities of PI substrate for inkjet printing by combining hydrophobic solution coating and O2 or Ar plasma treatments. Experiments were conducted to investigate the variation in inkjet-printed dot diameters with different surface treatments. The change i...

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Bibliographic Details
Published in:Thin solid films 2013-11, Vol.546, p.162-166
Main Authors: Park, Heung Yeol, Kang, Byung Ju, Lee, Dohyung, Oh, Je Hoon
Format: Article
Language:English
Subjects:
Coating
Condensed matter: structure, mechanical and thermal properties
Contact angle
Cross-disciplinary physics: materials science
rheology
Etching
Exact sciences and technology
Growth from solutions
Hydrophobic coating
Inkjet printing
Ion and electron beam-assisted deposition
ion plating
Materials science
Methods of crystal growth
physics of crystal growth
Methods of deposition of films and coatings
film growth and epitaxy
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Plasma applications
Plasma treatment
Plasma-based ion implantation and deposition
Printed electronics
Solid-fluid interfaces
Surface characterization
Surface roughness
Surface wettability
Surfaces and interfaces
thin films and whiskers (structure and nonelectronic properties)
Thin films
Wettability
Wetting
X-rays
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Summary:We have obtained a wide range of surface wettabilities of PI substrate for inkjet printing by combining hydrophobic solution coating and O2 or Ar plasma treatments. Experiments were conducted to investigate the variation in inkjet-printed dot diameters with different surface treatments. The change in chemical and physical characteristics of treated surfaces was evaluated using static contact angle measurements, field emission scanning electron microscopy, atomic force microscopy, and X-ray photoelectron spectroscopy. Only hydrophobic coated surface produces the smallest dot diameter and the largest contact angle. Dot diameter increases and contact angle decreases as the plasma treatment time increases. Since the removal of hydrophobic layer from the surface occurs due to the etching effect of O2 and Ar plasma during the plasma treatments, F/C ratio decreases with increasing the plasma treatment time. Surface roughness variations are also observed after plasma treatments. The ranges of printed dot sizes for O2 and Ar plasma treatments are 38μm–70μm and 38μm–92μm, respectively. Ar plasma treatment shows a wider range of surface wettability because of higher removal rate of the hydrophobic layer. This combination of hydrophobic coating and plasma treatment can offer an effective way to obtain a wide range of surface wettabilities for high quality inkjet-printed patterns. •Hydrophobic coating and plasma treatments were used to control surface wettability.•Inkjet-printed dot diameters increase with O2 or Ar plasma treatment time.•Contact angles of Ag ink agree well with the variation tendency of dot diameters.•The removal of hydrophobic layer occurs during the plasma treatments.•Ar plasma treatment shows a wider range of surface wettability than O2 plasma.
ISSN:0040-6090
1879-2731
DOI:10.1016/j.tsf.2013.03.067