Patent ID: 9610655
Date: 2017-04-04
CPC Classifications: B22F,B23K,C22C,H01L,H05K

Claim:
1. A solder paste comprising: a flux including rosin, a thinner and an activator; and a mixed powder mixed with the flux, the mixed powder including first powder and second powder mixed with each other, wherein the first powder includes tin and at least one metal dissolved in the tin, and the second powder includes a copper powder, and an Ag coating film formed on a surface of the copper powder, wherein a diameter of the copper powder included in the second powder is in a range of 4 μm to 7 μm and a thickness of the Ag coating film is 1 μm or less, and wherein the activator is present in an amount of 40% to 60% based on the total weight of the flux.