Plastic substrate, method for producing the same and touch screen panel containing the same
AssigneeKolon Industries, Inc.
InventorsHak Gee Jung, Hyo Jun Park, Chul Ha Ju
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Abstract
The present invention provides a plastic substrate, including: a polyimide film; a hard coating layer formed on one side of the polyimide film; and a transparent electrode layer formed on the other side of the polyimide film. The plastic substrate has excellent light transmittance high hardness characteristics, superior ITO processability and flexibility. Further, the plastic substrate can function as both a window film and an electrode film when it is applied to a touch screen panel. Thus, the present invention provides a touch screen panel which can be slimmed by reducing the number of laminated films including the plastic substrate.
Claims22
A plastic substrate, comprising:
- a polyimide film including a polyimide resin which is obtained by copolymerizing monomers comprising an aromatic dianhydride, an aromatic dicarbonyl compounds and an aromatic diamine, wherein the polyimide resin comprises a unit structure derived from the aromatic dianhydride, a unit structure derived from the aromatic dicarbonyl compound, and a unit structure derived from the aromatic diamine;
- and wherein the polyimide film has a yellowness of 5 or less and satisfying a light transmittance of 80% or more at a wavelength of 550 nm, measured by a UV spectrometer;
- a first hard coating layer formed on one side of the polyimide film;
- and
- a transparent electrode layer formed on the other side of the polyimide film.
A method of manufacturing a plastic substrate, comprising the steps of:
- forming a hard coating layer on one side of a polyimide film including imides of polyimide resin precursors prepared by a polymerization of aromatic dianhydrides, aromatic dicarbonyl compounds and aromatic dimaines, having a yellowness of 5 or less, and satisfying a light transmittance of 80% or more at a wavelength of 550 nm, as measured by a UV spectrometer;
- and
- forming a transparent electrode layer on the other side of the polyimide film,
- wherein the step of forming the transparent electrode layer includes a step of depositing the transparent electrode layer on the other side of the polyimide film and heat-treating the deposited transparent electrode layer, wherein the deposition or heat treatment is performed at 100 to 250° C.
Dependencies are inferred from the claim text.