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Electron‐beam curing of color filters for flexible‐display applications
Author(s) -
Kim Jeong Seog,
Lee Kyoung Ho,
Cheon Chae Il,
Cho Jung Min,
Lee Byoung Cheol,
Han Young Hwan
Publication year - 2009
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/jsid17.9.757
Subject(s) - materials science , cathode ray , curing (chemistry) , resist , composite material , irradiation , electron beam processing , polymerization , thermal , optics , electron , optoelectronics , polymer , physics , layer (electronics) , quantum mechanics , meteorology , nuclear physics
— Color filters spin‐coated on plastic and glass substrates have been cured by electron‐beam radiation instead of by the conventional thermal‐heating method. The electron‐beam curing of the color filters has many advantages over the thermal curing method. Electron‐beam curing is, in principle, a non‐thermal method where low‐temperature (<100°C) curing of color filters on plastic substrates can be realized for the manufacturing process of flexible display panels. A color‐filter resist having a 1.5‐μm thickness was spin‐coated on plastic (polycarbonate) and glass (corning 1737) substrates. The effect of the electron‐beam radiation conditions, such as electron‐beam energy (0.3–1.0 keV), radiation dosage (10–200 kGy), and ambient oxygen has been characterized. The degree of curing was analyzed by using the characteristic absorption peaks at 808 and 1405 cm −1 in the FT‐IR spectrum. These two peaks originate from the carbon double bonds (>C=C<) of the multi‐functional acrylate monomer which exist in the color‐filter resist. By electron‐beam radiation, the spin‐coated color filter can be effectively polymerized at