Thin films and fabrication method therefor

Abstract

A thin film. The thin film is fabricated by placing a thin film having a hydroxyl groups-containing surface in a water tank containing dicarboxylic acid and stretching the thin film.

1 . A method for fabricating a thin film, comprising: 
 placing a thin film having a hydroxyl groups-containing surface in a water tank containing dicarboxylic acid; and    stretching the thin film.    
   
   
       2 . The method for fabricating a thin film as claimed in  claim 1 , further comprising swelling the thin film.  
   
   
       3 . The method for fabricating a thin film as claimed in  claim 1 , further comprising dying the thin film with an iodine solution.  
   
   
       4 . The method for fabricating a thin film as claimed in  claim 3 , wherein the iodine solution comprises molecular iodine and iodide ions.  
   
   
       5 . The method for fabricating a thin film as claimed in  claim 1 , wherein the dicarboxylic acid has 4˜6 carbons.  
   
   
       6 . The method for fabricating a thin film as claimed in  claim 1 , wherein the dicarboxylic acid is adipic acid.  
   
   
       7 . The method for fabricating a thin film as claimed in  claim 1 , wherein the dicarboxylic acid has a weight percentage of about 1˜10%.  
   
   
       8 . The method for fabricating a thin film as claimed in  claim 1 , wherein the dicarboxylic acid has a weight ercentage of about 2˜5%.  
   
   
       9 . The method for fabricating a thin film as claimed in  claim 1 , further comprising adding transition metal ions, hydrochloric acid, sulfuric acid, or boric acid to the water tank.  
   
   
       10 . The method for fabricating a thin film as claimed in  claim 9 , wherein the transition metal ions comprise zinc ions.  
   
   
       11 . The method for fabricating a thin film as claimed in  claim 9 , wherein the transition metal ions have a weight percentage of about 0.1˜3%.  
   
   
       12 . The method for fabricating a thin film as claimed in  claim 9 , wherein the boric acid has a weight percentage of about 1˜3%.  
   
   
       13 . The method for fabricating a thin film as claimed in  claim 1 , wherein the water tank has an operating temperature of about 40˜60° C.  
   
   
       14 . The method for fabricating a thin film as claimed in  claim 1 , further comprising laminating at least one protective film on the thin film.  
   
   
       15 . The method for fabricating a thin film as claimed in  claim 14 , wherein the protective film comprises triacetyl cellulose (TAC), polyethylene terephthalate (PET), or polynorbornene.  
   
   
       16 . The method for fabricating a thin film as claimed in  claim 1 , wherein the thin film has a stretching ratio of about 6˜9.  
   
   
       17 . The method for fabricating a thin film as claimed in  claim 1 , wherein the thin film has a thickness of about 10˜20 μm.  
   
   
       18 . The method for fabricating a thin film as claimed in  claim 1 , wherein the thin film has a thickness ratio (original/stretched) of about 4˜8.  
   
   
       19 . The method for fabricating a thin film as claimed in  claim 1 , wherein the thin film has a width ratio (original/stretched) of about 1.5˜2.  
   
   
       20 . The method for fabricating a thin film as claimed in  claim 1 , wherein the thin film is a polyvinyl alcohol polarization film.  
   
   
       21 . A thin film formed by the fabrication method as claimed in  claim 1.