Manufacturing method of roughened copper foil

Abstract

A manufacturing method of a roughened copper foil includes the following steps. A copper foil is provided. An electrolytic process is performed to form a roughening layer on the copper foil. An electrolyte solution in the electrolysis process includes copper ions in a range from 0.1 g/L to 20 g/L, sulfate ions in a range from 30 g/L to 120 g/L, and a coordination compound in a range from 0.1 g/L to 10 g/L.

What is claimed is: 
     
         1 . A manufacturing method of a roughened copper foil, comprising:
 providing a copper foil; and   performing an electrolytic process to form a roughening layer on the copper foil, wherein an electrolyte solution in the electrolytic process comprises copper ions in a range from 0.1 g/L to 20 g/L, sulfate ions in a range from 30 g/L to 120 g/L, and a coordination compound in a range from 0.1 g/L to 10 g/L.   
     
     
         2 . The manufacturing method of a roughened copper foil according to  claim 1 , wherein the coordination compound comprises a benzotriazole-based compound, a propanesulfonic acid-based compound, ethylenediaminetetraacetic acid or a combination thereof. 
     
     
         3 . The manufacturing method of a roughened copper foil according to  claim 1 , wherein no other metal ions are further added to the electrolyte solution. 
     
     
         4 . The manufacturing method of a roughened copper foil according to  claim 1 , wherein the electrolytic process comprises a first electrolytic process and a second electrolytic process, and a first concentration of the copper ions used in the first electrolytic process is lower than a second concentration of the copper ions used in the second electrolytic process. 
     
     
         5 . The manufacturing method of a roughened copper foil according to  claim 4 , wherein the first concentration of the copper ions is from 0.1 g/L to 10 g/L, and the second concentration of the copper ions is from 1 g/L to 20 g/L. 
     
     
         6 . The manufacturing method of a roughened copper foil according to  claim 1 , further comprising performing a silylation treatment process after the performing the electrolytic process. 
     
     
         7 . The manufacturing method of a roughened copper foil according to  claim 1 , wherein the electrolytic process uses direct current. 
     
     
         8 . The manufacturing method of a roughened copper foil according to  claim 1 , wherein a temperature of the electrolytic process is from 25° C. to 60° C. 
     
     
         9 . The manufacturing method of a roughened copper foil according to  claim 1 , wherein current density of the electrolytic process is from 1 A/dm 2  to 120 A/dm 2 . 
     
     
         10 . The manufacturing method of a roughened copper foil according to  claim 1 , wherein duration of the electrolytic process is from 1 second to 45 seconds.