Patent ID: 11970613
Assignee: SK MICROWORKS CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 11:
12. A polymer film, which comprises a polymer resin selected from the group consisting of a polyamide-based resin and a polyimide-based resin; and butanoic acid,
wherein butanoic acid is contained in an amount of 1 ppm to 1,000 ppm, based on the total weight of the polymer film, and
wherein the IS value represented by the following Equation 7 is 5 to 160:, IS
     =
     
      IM
      +
      
       
        R
        ⁢
        S
       
       10
      
     
    
   
   
    
     Equation
     ⁢
        
     7
    
   
  
 

wherein in Equation 7, IM stands for the number of moles of imide repeat units when the total number of moles of the imide repeat units and amide repeat units in the film is 100; and RS stands for the content (ppm) of a residual solvent in the film.