Flexible display, method for manufacturing same, and support substrate for flexible display

Abstract

A flexible display supporting substrate of the present disclosure includes: a glass base (11); a plastic film (12) which has a surface (12s), the surface having a polish recess (12c), the plastic film being supported by the glass base (11); and an oxide layer (20) overlying a part of the surface (12s) of the plastic film (12) and covering at least part of the polish recess (12c).

1 . A flexible display comprising:
 a flexible substrate;   an OLED device supported by the flexible substrate,   a first gas barrier film that covers the flexible substrate, the first gas barrier film located between the OLED device the flexible substrate; and   a second gas barrier film supported by the flexible substrate and covering the OLED device   wherein the flexible substrate includes
 a plastic film which has a surface, the surface having at least one polish recess, the polish recess comprising a plurality of polish scars including a minute protrusion that has a height of not less than 50 nm and not more than 300 nm and/or a minute recessed portion that has a depth of not less than 50 nm and not more than 300 nm, and 
 a sintered layer formed selectively on the at least one polish recess to planarize the plurality of polish scars. 
   
     
     
         2 . The flexible display of  claim 1 , wherein the sintered layer has an upper surface flatter than the polish recess in the surface of the plastic film. 
     
     
         3 . The flexible display of  claim 1 , wherein the sintered layer has a thickness of not less than 100 nm and not more than 500 nm. 
     
     
         4 . A flexible display supporting substrate comprising:
 a glass base;   a plastic film which has a surface, the surface having at least one polish recess, the polish recess comprising a plurality of polish scars including a minute protrusion that has a height of not less than 50 nm and not more than 300 nm and/or a minute recessed portion that has a depth of not less than 50 nm and not more than 300 nm, the plastic film being supported by the glass base; and   a sintered layer formed selectively on the at least one polish recess to planarize the plurality of polish scars.   
     
     
         5 . The flexible display supporting substrate of  claim 4 , wherein sintered layer has an upper surface flatter than the polish recess in the surface of the plastic film. 
     
     
         6 . The flexible display supporting substrate of  claim 4 , wherein the sintered layer has a thickness of not less than 100 nm and not more than 500 nm. 
     
     
         7 . The flexible display supporting substrate of  claim 4 , comprising a gas barrier film covering the surface of the plastic film and the sintered layer.