Metal treatment – Compositions – Heat treating
Patent
1990-05-22
1991-12-17
Dean, H.
Metal treatment
Compositions
Heat treating
148430, C22F 102, C22C 502
Patent
active
050732102
ABSTRACT:
A method of making material in the form of a fine wire or thin strip or sheet suitable for use as electrical conductors comprises: forming an ingot substantially consisting of an alloy of gold and one or more of the metals titanium, lutetium, zirconium, scandium and hafnium, the amount of the or each of said one or more of the metals in the alloy lying in the range from substantially 0.1 at % to an upper limit comprising the atomic percentage of that metal corresponding to the maximum solubility of that metal in the alloy; solution heat treating the ingot and then quenching the ingot from the solution heat treatment temperature; mechanically working the ingot to have a maximum dimension in at least one direction of not greater than 250 .mu.m; and heat treating the resulting material at a temperature below its solvus temperature from an ambient atmosphere containing oxygen and/or nitrogen in the ambient atmosphere. The conductors exhibit high tensile strength and resistance to elongation under load and retention of such properties after being heated to elevated temperatures for extended periods of time, such as to render them particularly suitable for use as bond-wires in integrated circuit packages.
REFERENCES:
patent: 3922180 (1975-11-01), Fuchs et al.
patent: 4387073 (1983-06-01), Westbrook
patent: 4529667 (1985-07-01), Shiga et al.
patent: 4911769 (1990-03-01), Yamada et al.
Haeussler et al., "Preparation and case hardening of dispersion hardened copper alloys", Technik, vol. 28, No. 10, 1973, pp. 622-627, Chemical Abstracts #80(14):73373k.
"Binary alloy phase diagrams Ac-Au to Fe-Rh", by T. B. Massalski appearing in American Society for Metals, vol. 1, 1988, pp. 326, 340, 310, 266 and 277.
Article entitled "The development of 990 Gold-Titanium: its production, use and properties", by G. Gafner in Gold Bulletin, 1989, 22(4), pp. 112-122.
Article entitled "The promise of 990 gold", by A. M. Tasker in Aurum 34, pp. 62-67.
Article entitled "Dispersion Hardened Gold", by Poniatowski et al., in Gold Bulletin, 1972, 5, p. 34.
Humpston Giles
Jacobson David M.
Dean H.
Schumaker David W.
The General Electric Company p.l.c.
LandOfFree
Method of making electrical conductors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of making electrical conductors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making electrical conductors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-833664