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US 10,328,533 B2Granted
Hybrid lead-free solder wire
AssigneeIndium Corporation
InventorsHongwen Zhang, Ning-Cheng Lee
Life of this patent
Estimating the term…
Abstract
A braided solder wire rope includes a first alloy including Bi—Ag, Bi—Cu, Bi—Ag—Cu, or Bi—Sb; and the second alloy including Sn, In Sn—Ag, Sn—Cu, Sn—Ag—Cu, Sn—Zn, Bi—Sn, Sn—In, Sn—Sb or Bi—In, such that the second alloy controls an interface reaction chemistry with various metallization surface finish materials without interfering with a high temperature performance of the first alloy. The first alloy may have a solidus temperature around 258° C. and at least the first alloy of the first wire and the second alloy of the second wire may be braided together.
Claims25
A braided solder wire rope comprising:
- a first wire composed of a first alloy comprising:
- Bi—Ag, Bi—Cu, Bi—Ag—Cu, Bi—Sb, Bi—Sb—X (where X═Ag, Al, Au, Co, Cu, Ga, Ge, In, Mn, Ni, P, Pd, Pt, Sb, Sn, Zn), or Bi—Ag—Cu—X (where X═Al, Au, Co, Ga, Ge, In, Mn, Ni, P, Pd, Pt, Sb, Sn, or Zn);
- and
- a second wire composed of a second alloy or metal comprising:
- Sn, Sn—Sb, Sn—Ag, Sn—Cu, Sn—Ag—Cu, Sn—Zn, Sn—Bi, Sn—In, Bi—In, Bi—Sn, Sn—Ag—Cu—X (where X═Al, Au, Bi, Co, Ga, Ge, In, Mn, Ni, P, Pd, Pt, Sb, or Zn), Bi—Sn—X (X═Ag, Al, Au, Co, Cu, Ga, Ge, In, Mn, Ni, P, Pd, Pt, Sb, or Zn), Sn—In—X (X═Ag, Al, Au, Bi, Co, Cu, Ga, Ge, Mn, Ni, P, Pd, Pt, Sb, or Zn), Sn—Sb—X (X═Ag, Al, Au, Bi, Co, Cu, Ga, Ge, In, Mn, Ni, P, Pd, Pt, or Zn), or Bi—In—X (X═Ag, Al, Au, Co, Cu, Ga, Ge, Mn, Ni, P, Pd, Pt, Sb, or Zn);
- wherein the first alloy has a solidus temperature of around 258° C. and above;
- wherein the first wire and the second wire are braided together.
4 more elements
Dependencies are inferred from the claim text.