Polyimide polymers for flexible electrical device substrate materials and flexible electrical devices comprising the same

Abstract

A polyimide polymer of Formula (I) for flexible electrical device substrate material is provided. In Formula (I), B is a polycyclic aliphatic group, A is an aromatic group containing at least one ether bond, A′ is an aromatic or aliphatic group, and 1≦n/m≦4. The invention also provides a flexible electrical device including the polyimide polymer.

1 . A polyimide polymer for flexible electrical device substrate material, of Formula (I): 
       
         
           
           
               
               
           
         
         wherein 
         B is a polycyclic aliphatic group; 
         A is an aromatic group containing at least one ether bond; 
         A′ is an aromatic or aliphatic group; and 
         1≦n/m≦4. 
       
     
     
         2 . The polyimide polymer for flexible electrical device substrate material as claimed in  claim 1 , wherein B comprises: 
       
         
           
           
               
               
           
         
       
     
     
         3 . The polyimide polymer for flexible electrical device substrate material as claimed in  claim 1 , wherein A comprises: 
       
         
           
           
               
               
           
         
       
     
     
         4 . The polyimide polymer for flexible electrical device substrate material as claimed in  claim 1 , wherein A′ comprises: 
       
         
           
           
               
               
           
         
       
     
     
         5 . A flexible electrical device, comprising:
 a first substrate;   a second substrate opposed to the first substrate, wherein one of the first and second substrates comprises a polyimide polymer as claimed in  claim 1 ; and   a medium layer disposed between the first substrate and the second substrate.   
     
     
         6 . The flexible electrical device as claimed in  claim 5 , wherein the medium layer comprises liquid crystal or polymer. 
     
     
         7 . The flexible electrical device as claimed in  claim 5 , wherein the flexible electrical device comprises a particle display, liquid crystal display or micro electro mechanical system (MEMS) display. 
     
     
         8 . The flexible electrical device as claimed in  claim 7 , wherein the particle display comprises a electrochromic display (ECD) or electro-phoretic display (EPD). 
     
     
         9 . The flexible electrical device as claimed in  claim 7 , wherein the liquid crystal display comprises cholesteric liquid crystal display (ChLCD) or bistable twisted-nematic (TN) liquid crystal display. 
     
     
         10 . The flexible electrical device as claimed in  claim 5 , wherein the flexible electrical device comprises a solar cell.