Encapsulation film for organic light emitting display device, method of manufacturing the same, and organic light emitting display device using the same

Abstract

Disclosed is an organic light emitting display apparatus. An outer portion of an adhesive layer is set higher in degree of cure than a center portion of the adhesive layer, and thus, a driving defect is prevented from occurring because the adhesive layer stretches in a manufacturing process, and various defects are prevented from being caused by a jig, thereby enhancing reliability and productivity of the organic light emitting display apparatus.

What is claimed is: 
     
         1 . A structure comprising:
 a first film having metal properties; and   a second film adhered to one surface of the first film having metal properties, the second film including: a first area having a relatively low viscosity; and a second area having a relatively high viscosity compared to the first area and surrounding an outer portion of the first area having the relatively lower viscosity, and the second film enabling roll-to-roll processing to be performed,   wherein the first film and the second film are provided as one body to function as an encapsulation part for an organic light emitting display apparatus.   
     
     
         2 . The structure of  claim 1 , wherein the second area having the relatively high viscosity is formed through heat or light curing in a laser cutting process of the structure. 
     
     
         3 . The structure of  claim 2 , wherein a dimension characteristic of the second area having the relatively high viscosity is determined based on at least one of a condition of the laser cutting process, a characteristic for functioning as the encapsulation part for organic light emitting display apparatuses, and a characteristic of the second film. 
     
     
         4 . The structure of  claim 3 , wherein,
 a side surface of the first film is configured to protrudes further than a side surface of the second film so that the second film is effectively supported and protected, and a margin area for a case where the second film stretches due to heat or pressure in a bonding process of the second film is provided.   
     
     
         5 . An encapsulation film for an organic light emitting display apparatus, the encapsulation film comprising:
 a metal layer and an adhesive layer, configured to function as an encapsulation part of the organic light emitting display apparatus,   wherein the adhesive layer comprises a first area that is higher in viscosity than a second area to prevent the adhesive layer from excessively stretching in a process of manufacturing the organic light emitting display apparatus.   
     
     
         6 . The encapsulation film of  claim 5 , wherein the second area of the adhesive layer surrounds the first area of the adhesive layer. 
     
     
         7 . The encapsulation film of  claim 6 , wherein
 a degree of cure of the second area is higher than a degree of cure of the first area, or   reaction energy of the first area is higher than reaction energy of the second area.   
     
     
         8 . The encapsulation film of  claim 7 , wherein the degree of cure of the second area is 95% to 100%. 
     
     
         9 . The encapsulation film of  claim 6 , wherein an area of the metal layer is broader than an area of the adhesive layer. 
     
     
         10 . An organic light emitting display apparatus comprising:
 an organic light emitting device on a substrate;   an adhesive layer configured to seal the organic light emitting device; and   a metal layer on the adhesive layer,   wherein the adhesive layer comprises a first portion and a second portion, a degree of cure of the second portion is higher than a degree of cure of the first portion, and the second portion surrounds the first portion.   
     
     
         11 . The organic light emitting display apparatus of  claim 10 , wherein reaction energy of the first portion of the adhesive layer is higher than reaction energy of the second portion of the adhesive layer. 
     
     
         12 . The organic light emitting display apparatus of  claim 11 , wherein a degree of cure of the second portion of the adhesive layer is 98% to 100%. 
     
     
         13 . The organic light emitting display apparatus of  claim 12 , wherein the second portion of the adhesive layer does not overlap the organic light emitting device. 
     
     
         14 . The organic light emitting display apparatus of  claim 10 , wherein a side surface of a metal layer protrudes further than a side surface of the adhesive layer. 
     
     
         15 . The organic light emitting display apparatus of  claim 10 , wherein the metal layer and the adhesive layer are simultaneously adhered to the organic light emitting device. 
     
     
         16 . A method of manufacturing an encapsulation film for an organic light emitting display apparatus, the method comprising:
 laminating a base metal layer and a base adhesive layer;   forming an adhesive layer including a first portion, and a second portion that is higher in viscosity than the first portion by removing a cut portion of the base adhesive layer with a first laser; and   forming a metal layer by removing a cut portion of the base metal layer with a second laser,   wherein the second portion is formed simultaneously with removing the cut portion of the base adhesive layer.   
     
     
         17 . The method of  claim 16 , wherein the second portion surrounds the first portion. 
     
     
         18 . The method of  claim 16 , wherein an irradiation area of the second laser corresponds to an irradiation area of the first laser. 
     
     
         19 . The method of  claim 18 , wherein the first laser uses a gas laser, and the second laser uses an optical fiber laser. 
     
     
         20 . The method of  claim 16 , wherein a width of the cut portion of the base metal layer is more narrow than a width of the cut portion of the base adhesive layer.