Metal substrate for flexible display and method of manufacturing the same

Abstract

The present disclosure discloses a metal substrate for a flexible display and a method of manufacturing the same, which reduce surface roughness of the metal substrate for a flexible display. The method comprises: providing a core mold adapted for a metal substrate for a flexible display; forming an electroforming metal layer at the surface of the core mold by using the core mold as a cathode, an electroforming metal used for the metal substrate for a flexible display as an anode, and a solution of a salt of the electroforming metal as an electroforming solution, and by immerging the core mold in the electroforming solution together with the electroforming metal to carry out electroforming; peeling off the electroforming metal layer from the core mold.

1 . A method of manufacturing a metal substrate for a flexible display, comprising:
 providing a core mold adapted for a metal substrate for a flexible display;   forming an electroforming metal layer at the surface of the core mold by using the core mold as a cathode, an electroforming metal used for the metal substrate for a flexible display as an anode, and a solution of a salt of the electroforming metal as an electroforming solution, and immerging the core mold in the electroforming solution together with the electroforming metal to carry out electroforming; and   peeling off the electroforming metal layer from the core mold.   
     
     
         2 . The method according to  claim 1 , wherein, after immerging the core mold in the electroforming solution together with the electroforming metal, and during the electroforming, the method further includes:
 jetting the electroforming solution to the surface of the core mold, and at the same time stirring the electroforming solution around the core mold.   
     
     
         3 . The method according to  claim 1 , wherein components of the electroforming solution and contents thereof include: 
       
         
           
                 
                 
                 
               
                     
                     
                 
                     
                   nickel sulfamate 
                   54.0 g/l~63.0 g/l, 
                 
                     
                   nickel chloride 
                   140.0 g/l~180.0 g/l, 
                 
                     
                   benzoic sulfimide 
                   0.5 g/l~1.0 g/l, 
                 
                     
                   sodium lauryl sulfate 
                   0.05 g/l~1.0 g/l,  
                 
                     
                   1,4-butanediol 
                         0.2 g/l~0.6 g/l, and 
                 
                     
                   boric acid 
                   30.0 g/l~45.0 g/l. 
                 
                     
                     
                 
             
                
               
               
                
                
                
                
                
                
                
               
            
           
         
       
     
     
         4 . The method according to  claim 3 , wherein the electroforming solution is an electroforming solution that is obtained via filtration through a filtrating core of 1 μm, a PH of the electroforming solution is from 4.5 to 5.5, and a temperature of the electroforming solution is from 45° C. to 60° C. 
     
     
         5 . The method according to  claim 2 , wherein components of the electroforming solution and contents thereof include: 
       
         
           
                 
                 
                 
               
                     
                     
                 
                     
                   nickel sulfamate 
                   54.0 g/l~63.0 g/l, 
                 
                     
                   nickel chloride 
                   140.0 g/l~180.0 g/l, 
                 
                     
                   benzoic sulfimide 
                   0.5 g/l~1.0 g/l, 
                 
                     
                   sodium lauryl sulfate 
                   0.05 g/l~1.0 g/l,  
                 
                     
                   1,4-butanediol 
                         0.2 g/l~0.6 g/l, and 
                 
                     
                   boric acid 
                   30.0 g/l~45.0 g/l. 
                 
                     
                     
                 
             
                
               
               
                
                
                
                
                
                
                
               
            
           
         
       
     
     
         6 . The method according to  claim 5 , wherein the electroforming solution is an electroforming solution that is obtained via filtration through a filtrating core of 1 μm, a PH of the electroforming solution is from 4.5 to 5.5, and a temperature of the electroforming solution is from 45° C. to 60° C. 
     
     
         7 . The method according to  claim 1 , wherein an electric current used during the electroforming is an electric current having a current density of 2-10 A/cm 2 , and an electrical source used during the electroforming is a high frequency pulse electrical source having a pulse frequency of 10-5000 hertz. 
     
     
         8 . The method according to  claim 2 , wherein an electric current used during the electroforming is an electric current having a current density of 2-10 A/cm 2 , and an electrical source used during the electroforming is a high frequency pulse electrical source having a pulse frequency of 10-5000 hertz. 
     
     
         9 . The method according to  claim 1 , wherein after immerging the core mold in the electroforming solution together with the electroforming metal, a distance between the core mold and the electroforming metal is kept from 30 cm to 40 cm. 
     
     
         10 . The method according to  claim 2 , wherein after immerging the core mold in the electroforming solution together with the electroforming metal, a distance between the core mold and the electroforming metal is kept from 30 cm to 40 cm. 
     
     
         11 . The method according to  claim 1 , wherein the providing of a core mold adapted for a metal substrate for a flexible display comprises:
 providing a core mold substrate adapted for a metal substrate for a flexible display;   immerging the core mold substrate in a degreasing agent to carry out chemical degreasing;   cleaning the chemical degreased core mold substrate; and   drying the cleaned core mold substrate, to obtain the core mold adapted for a metal substrate for a flexible display.   
     
     
         12 . The method according to  claim 11 , wherein the immerging of the core mold substrate in the degreasing agent to carry out chemical degreasing includes:
 immerging the core mold substrate in the degreasing agent having a temperature of 50° C. for 30 minutes to carry out the chemical degreasing.   
     
     
         13 . The method according to  claim 12 , wherein components of the degreasing agent and contents thereof in term of weight ratio are as follows: sodium hydroxide:sodium carbonate:trisodium phosphate=10:5:4. 
     
     
         14 . The method according to  claim 13 , wherein the core mold substrate is a stainless steel substrate with a thickness of 0.04 mm. 
     
     
         15 . The method according to  claim 2 , wherein the providing of a core mold adapted for a metal substrate for a flexible display comprises:
 providing a core mold substrate adapted for a metal substrate for a flexible display;   immerging the core mold substrate in a degreasing agent to carry out chemical degreasing;   cleaning the chemical degreased core mold substrate; and   drying the cleaned core mold substrate, to obtain the core mold adapted for a metal substrate for a flexible display.   
     
     
         16 . The method according to  claim 15 , wherein the immerging of the core mold substrate in the degreasing agent to carry out chemical degreasing includes:
 immerging the core mold substrate in the degreasing agent having a temperature of 50° C. for 30 minutes to carry out the chemical degreasing.   
     
     
         17 . The method according to  claim 16 , wherein components of the degreasing agent and contents thereof in term of weight ratio are as follows: sodium hydroxide:sodium carbonate:trisodium phosphate=10:5:4. 
     
     
         18 . The method according to  claim 17 , wherein the core mold substrate is a stainless steel substrate with a thickness of 0.04 mm. 
     
     
         19 . A metal substrate for a flexible display manufactured with a method according to  claim 1 .