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US 10,949,037 B2Granted
Method for manufacturing flexible display device comprising touch sensor
AssigneeDongwoo Fine-Chem Co., Ltd.
InventorsDohyoung Kwon, Euk Kun Yoon
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Abstract
The present invention provides a method for manufacturing a flexible display device comprising a touch sensor, capable of controlling process dispersion and inhibiting cracks during the transfer of the touch sensor.
Drawings
Claims3
A method for manufacturing a flexible display device, comprising the steps of:
- (i) attaching a substrate film with a UV reactive adhesive to a touch sensor formed on a carrier substrate;
- (ii) separating the carrier substrate from the touch sensor to which the substrate film is attached;
- (iii) attaching an optical film to the touch sensor from which the carrier substrate is separated;
- and
- (iv) irradiating the UV reactive adhesive with UV rays to cure the adhesive and removing the substrate film with the UV reactive adhesive,
- wherein the UV reactive adhesive comprises an acryl-based copolymer, a cross-linking agent, a polyfunctional acrylate, and a photoinitiator,
- wherein the cross-linking agent is one or more selected from the group consisting of an isocyanate cross-linking agent, an epoxy cross-linking agent, a peroxide cross-linking agent, a metal chelate cross-linking agent, and an oxazoline cross-linking agent,
- wherein the acryl-based copolymer is crosslinked with the cross-linking agent without UV radiation in step (i), thereby imparting adhesion strength,
- wherein the polyfunctional acrylate is photopolymerized upon UV radiation in step (iv), thereby reducing peeling strength of the UV reactive adhesive,
- wherein all the steps of (i) to (iv) are carried out by a sheet-to-sheet method, and
- wherein a thickness of the substrate film is 75 to 200 μm.
8 more elements
Dependencies are inferred from the claim text.