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Characteristics of sub-80 nm three-layered film manufactured by continuous roll-to-roll processes

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2023, 33(5), pp.191~195
  • DOI : 10.6111/JKCGCT.2023.33.5.191
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : September 14, 2023
  • Accepted : October 11, 2023
  • Published : October 31, 2023

Kim, Namil 1,  Geug Tae Kim 1

1한남대학교

Accredited

ABSTRACT

Three-layer nano-coated films in applications for the back cover of mobile cellular phones were prepared utilizing a roll-to-roll continuous process. By introducing a coating layer with a ceramic/metal/ceramic three-layer structure,the inherent reflective properties of the metals were maintained while electrically insulating properties were maintained. The thickness of the composite coating layer on a large area PET film with a length of 1,500 nm and width of 500 nm was less than 60 nm, and a uniform thickness was maintained in all areas. The transmittance according to the wavelength range (240~1600 nm) of the nanocoating film gradually increases as the wavelength increases, and is about 48 % at 1,000 nm, which is within the infrared region, and about 35.5 % at 550 nm, which is within the visible region. These results meet the required level of coated backcover (< 40 %).

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