Patent ID: 9636784
Date: 2017-05-02
CPC Classifications: B23K,C22C,H01L,H05K,Y10T

Claim:
1. A solder paste, consisting of: an amount of a first solder alloy powder between 44 wt % to less than 60 wt %; an amount of a second solder alloy powder between greater than 0 wt % and 48 wt %; and flux; wherein the first solder alloy powder consists of a first solder alloy that has a solidus temperature above 260° C., wherein the first solder alloy is a Bi—Ag alloy, a Bi—Ag—Y alloy, a Bi—Cu alloy, a Bi—Cu—Y alloy, a Bi—Ag—Cu alloy, or a Bi—Ag—Cu—Y alloy, wherein Y consists of Al, Au, Co, Ga, Ge, In, Mn, Ni, P, Pd, Pt, Sb, Sn, or Zn; and wherein the second solder alloy powder consists of a second solder alloy that has a solidus temperature that is less than 250° C.