Flexible substrate

Abstract

There is provided a flexible substrate having excellent flexibility and gas barrier properties. A flexible substrate 100 according to the present invention includes: a base material 20 including an inorganic glass 10 and resin layers 11 and 11 ′ placed on both sides of the inorganic glass 10 ; and an inorganic thin film 12 placed on a side of one of the resin layers where the inorganic glass is not placed, wherein the inorganic thin film 12 is formed on at least a peripheral edge of one surface of the base material.

1 . A flexible substrate, comprising:
 abase material including an inorganic glass and resin layers placed on both sides of the inorganic glass; and   an inorganic thin film placed on a side of one of the resin layers where the inorganic glass is not placed,   wherein the inorganic thin film is formed on at least a peripheral edge of one surface of the base material.   
     
     
         2 . A flexible substrate according to  claim 1 , wherein the inorganic thin film is formed on an entire surface of the one surface of the base material. 
     
     
         3 . A flexible substrate according to  claim 1 , further comprising a smoothing layer, the smoothing layer being placed on a side of the inorganic thin film where the resin layers are not placed. 
     
     
         4 . A flexible substrate according to  claim 3 , further comprising another inorganic thin film, wherein the another inorganic thin film is placed on a side of the smoothing layer where the resin layers are not placed. 
     
     
         5 . A flexible substrate according to  claim 1 , wherein the flexible substrate has a thickness (total thickness) of 600 μm or less. 
     
     
         6 . A flexible substrate according to  claim 1 , wherein the resin layers are each formed of a resin composition containing an epoxy-based resin and/or an oxetane-based resin as a main component. 
     
     
         7 . A flexible substrate according to  claim 1 , wherein the resin layers each contain a thermoplastic resin having repeating units represented by a general formula (X) and/or a general formula (Y): 
       
         
           
           
               
               
           
         
         where:
 R 1  represents a substituted or unsubstituted aryl group having 6 to 24 carbon atoms, a cycloalkylene group having 4 to 14 carbon atoms, or a linear or branched alkylene group having 1 to 8 carbon atoms; 
 R 2  represents a substituted or unsubstituted aryl group having 6 to 24 carbon atoms, a linear or branched alkyl group having 1 to 8 carbon atoms, a linear or branched alkylene group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 12 carbon atoms, a cycloalkylene group having 5 to 12 carbon atoms, or a hydrogen atom; 
 R 3  and R 4  each independently represent a linear or branched alkyl group having 1 to 8 carbon atoms, a hydrogen atom, a linear or branched alkylene group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 12 carbon atoms, or a cycloalkylene group having 5 to 12 carbon atoms; 
 A represents a carbonyl group, or a linear or branched alkylene group having 1 to 8 carbon atoms; 
 m represents an integer of 0 to 8; and 
 n represents an integer of 0 to 4. 
 
       
     
     
         8 . A flexible substrate according to  claim 1 , wherein the resin layers each contain a thermoplastic resin having one or more repeating units represented by a general formula (Z): 
       
         
           
           
               
               
           
         
         where:
 R 1  represents a substituted or unsubstituted aryl group having 6 to 24 carbon atoms, a linear or branched alkylene group having 1 to 8 carbon atoms, or a cycloalkylene group having 4 to 14 carbon atoms, or an oxygen atom; and 
 R 2  represents a substituted or unsubstituted aryl group having 6 to 24 carbon atoms, a linear or branched alkyl group having 1 to 8 carbon atoms, a linear or branched alkylene group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 12 carbon atoms, a cycloalkylene group having 5 to 12 carbon atoms, or a hydrogen atom. 
 
       
     
     
         9 . A flexible substrate according to  claim 1 , wherein the resin layers each contain a polyether sulfone-based resin. 
     
     
         10 . A flexible substrate according to  claim 1 , wherein the inorganic thin film contains at least one kind of an inorganic compound selected from the group consisting of oxides, nitrides, hydrides, and composite compounds of them. 
     
     
         11 . A flexible substrate according to  claim 10 , wherein the inorganic compound has an amorphous structure. 
     
     
         12 . A flexible substrate according to  claim 1 , wherein the inorganic thin film is of a three-layer configuration having an inorganic oxide layer, an inorganic nitride layer, and an inorganic oxide layer. 
     
     
         13 . A flexible substrate according to  claim 1 , further comprising a transparent electrode placed on a side of the inorganic thin film where the resin layers are not placed. 
     
     
         14 . An organic electroluminescence display apparatus comprising the flexible substrate according to  claim 1 .