Patent ID: 9457406
Filing Date: 2016-10-04
CPC Classification: B22F,B32B,C22C,C23C,H01B,H05K,Y10T

Claim Text:
1. A method for producing a copper metal film, comprising: producing gaseous formic acid by converting liquid formic acid to gaseous formic acid, and treating a copper-based particle deposition layer containing both copper oxide and a metallic transition metal or alloy, or a transition metal complex containing a metal element, with the gaseous formic acid converted from liquid formic acid, the gaseous formic acid being heated to 120° C. or higher, wherein a ratio of copper oxide to the metallic transition metal or alloy or the transition metal complex containing a metal element in the copper-based particle deposition layer is 9:1 to 100,000:1.