Claims
- 1. A fine gold alloy wire for use in the bonding of semiconductor elements characterized by having high tensile strength and consisting essentially from 0.0003 to less than 0.0010 wt% of at least one rare earth element selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Sc and Y, with the balance being Au and incidental impurities.
- 2. The fine gold wire of claim 1 wherein said rare earth element is selected from the group consisting of La, Ce, Pr, Nd, and Sm.
- 3. A fine gold alloy wire for use in the bonding of semiconductor elements characterized by having high tensile strength and consisting essentially of 0.0003 to less than 0.0010 wt% of at least one rare earth element selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Sc and Y, and 0.0001 to 0.0060 wt% of of at least one element selected from the group consisting of Ge, Be and Ca, with the balance being Au and incidental impurities.
- 4. The fine gold wire of claim 3 wherein said rare earth element is selected from the group consisting of La, Ce, Pr, Nd, and Sm.
Priority Claims (2)
Number |
Date |
Country |
Kind |
195299 |
Dec 1981 |
JPX |
|
37580 |
Mar 1982 |
JPX |
|
Parent Case Info
This application is a continuation of Ser. No. 825,942 filed Feb. 3, 1986 (abandoned); which is a continuation of Ser. No. 586,642 filed Mar. 7, 1984 (abandoned); which is a CIP of Ser. No. 419,840 filed Sept. 20, 1982 (abandoned).
US Referenced Citations (7)
Foreign Referenced Citations (10)
Number |
Date |
Country |
1608161 |
Sep 1970 |
DEX |
2741277 |
Mar 1979 |
DEX |
105968 |
Sep 1978 |
JPX |
112060 |
Sep 1978 |
JPX |
13740 |
Feb 1981 |
JPX |
19629 |
Feb 1981 |
JPX |
30731 |
Mar 1981 |
JPX |
49534 |
May 1981 |
JPX |
49535 |
May 1981 |
JPX |
96741 |
Jun 1983 |
JPX |
Continuations (2)
|
Number |
Date |
Country |
Parent |
825942 |
Feb 1986 |
|
Parent |
586642 |
Mar 1984 |
|
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
419840 |
Sep 1982 |
|