Flexible display and method for manufacturing the same

Abstract

A flexible display comprises a flexible substrate made of plastic material, a display element on a first surface of the flexible substrate, and a surface residual film containing at least one of a metal material or a metal oxide material. The surface residual film is bonded to at least a part of a second surface of the flexible substrate. The second surface is opposed to the first surface. A method for manufacturing a flexible display comprises preparing a glass substrate, forming adhesive material film on the glass substrate, the adhesive material film being made of at least one of a metal material or a metal oxide material, and forming a flexible substrate from plastic material on the adhesive material film.

1 . A flexible display, comprising:
 a flexible substrate made of plastic material;   a display element on a first surface of the flexible substrate; and   a surface residual film containing at least one of a metal material or a metal oxide material, the surface residual film being bonded to at least a part of a second surface of the flexible substrate, the second surface being opposed to the first surface.   
     
     
         2 . The flexible display as claimed in  claim 1 , wherein
 the plastic material includes a functional group of —CONH—.   
     
     
         3 . The flexible display as claimed in  claim 2 , wherein
 the flexible substrate is formed from a material containing a polyimide.   
     
     
         4 . The flexible display as claimed in  claim 2 , wherein
 the flexible substrate has a thickness ranging from 5 μm to 200 μm.   
     
     
         5 . The flexible display as claimed in  claim 2 , wherein
 the flexible substrate has a coefficient of thermal expansion ranging from 3 ppm/° C. to 10 ppm/° C.   
     
     
         6 . The flexible display as claimed in  claim 2 , wherein
 the surface residual film contains material bonded to the functional group of —CONH—.   
     
     
         7 . The flexible display as claimed in  claim 6 , wherein
 the metal material is bonded to the functional group of —CONH—, and   the metal material includes at least one of aluminum, gallium, indium, titanium, molybdenum, and zinc.   
     
     
         8 . The flexible display as claimed in  claim 6 , wherein
 the metal oxide material is bonded to the functional group of —CONH—, and   the metal oxide material includes at least one of aluminum oxide, gallium oxide, zinc oxide, titanium oxide, indium oxide, indium tin oxide, indium zinc oxide, and gallium indium zinc oxide.   
     
     
         9 . The flexible display as claimed in  claim 1 , wherein
 the display element includes a thin film transistor.   
     
     
         10 . The flexible display as claimed in  claim 9 , wherein
 the display element is any one of an organic light emitting diode display device, a liquid crystal display device, or an electrophoretic display device.   
     
     
         11 . The flexible display as claimed in  claim 1 , wherein
 the surface residual film has a thickness ranging from 0.1 nm to 1000 nm.   
     
     
         12 . A method for manufacturing a flexible display, comprising:
 preparing a glass substrate;   forming adhesive material film on the glass substrate, the adhesive material film being made of at least one of a metal material or a metal oxide material and   forming a flexible substrate from a plastic material on the adhesive material film.   
     
     
         13 . The method as claimed in  claim 12 , wherein
 the plastic material includes a functional group of —CONH—.   
     
     
         14 . The method as claimed in  claim 13 , wherein
 the flexible substrate is formed from a material containing polyimide.   
     
     
         15 . The method as claimed in  claim 13 , wherein
 the flexible substrate is formed by a slit coating method or a screen printing method.   
     
     
         16 . The method as claimed in  claim 15 , wherein
 the flexible substrate has a thickness ranging from 5 μm to 200 μm   
     
     
         17 . The method as claimed in  claim 13 , wherein
 the flexible substrate has the same coefficient of thermal expansion as the glass substrate.   
     
     
         18 . The method as claimed in  claim 13 , wherein
 the flexible substrate has a coefficient of thermal expansion of less than 10 ppm/° C.   
     
     
         19 . The method as claimed in  claim 13 , wherein
 the adhesive material film contains a material capable of being bonded to the functional group of —CONH—.   
     
     
         20 . The method as claimed in  claim 19 , wherein
 the metal material is bonded to the functional group of —CONH—, and   the metal material includes at least one of aluminum, gallium, indium, titanium, molybdenum, and zinc.   
     
     
         21 . The method as claimed in  claim 19 , wherein
 the metal oxide material is bonded to the functional group of —CONH—, and   the metal oxide material includes at least one of aluminum oxide, gallium oxide, zinc oxide, titanium oxide, indium oxide, indium tin oxide, indium zinc oxide, and gallium indium zinc oxide.   
     
     
         22 . The method as claimed in  claim 19 , wherein
 the adhesive material film is formed by atomic layer deposition.   
     
     
         23 . The method as claimed in  claim 22 , wherein
 the adhesive material film has a thickness ranging from 0.1 nm to 1000 nm.   
     
     
         24 . The method as claimed in  claim 12 , further comprising
 separating the flexible substrate and the glass substrate from each other.   
     
     
         25 . The method as claimed in  claim 24 , wherein
 the flexible substrate and the adhesive material film are separated from each other by radiation of laser light.   
     
     
         26 . The method as claimed in  claim 24 , wherein
 the adhesive material film and the glass substrate are separated from each other by radiation of laser light.   
     
     
         27 . The method as claimed in  claim 24 , further comprising
 forming a display element on the flexible substrate.   
     
     
         28 . The method as claimed in  claim 27 , wherein
 the display element includes a thin film transistor.   
     
     
         29 . The method as claimed in  claim 28 , wherein
 the display element is any one of an organic light emitting diode display device, a liquid crystal display device, and an electrophoretic display device.