US4612167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper-base alloys for leadframes
Assignee: Proterial Ltd
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Filing: 1985-03-01
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Granted: 1986-09-16
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Expires: 2005-03-01
Abstract
Abstract A copper-base alloy for leadframes comprising 0.8-4.0 weight % of Ni, 0.2-4.0 weight % of Ti, and balance Cu and inevitable impurities, the ratio of Ni to Ti being 1-4. It may also comprise 0.1-2.0 weight % of Zn. It may further comprise 0.01-2.0 weight % of at least one of Fe and Co and 0.005-0.5 weight % of at least one element selected from the group consisting of Al, Si, Mn and Mg. The copper-base alloy has good electric conductivity and high mechanical strength. It further has good solderability and solder durability.
Inventors
- 👤 Rikizo Watanabe
- 👤 Daizi Sakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:58
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/40; H10W70/456; C; C22; C22C; C22C9/00; C22C9/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
39 words
A copper-base alloy for leadframes consisting essentially of 0.8-4.0 weight % of Ni, 0.2-4.0 weight % of Ti, 0.1-2.0 weight % of Zn, the essential balance being Cu and inevitable impurities, the ratio of Ni to Ti being 1-4.
Claim 2
Dependent Claim
39 words
A copper-base alloy for leadframes consisting essentially of 0.8-4.0 weight % of Ni, 0.2-4.0 weight % of Ti, 0.1-2.0 weight % of Zn, the essential balance being Cu and inevitable impurities, the ratio of Ni to Ti being 1-4.
Claim 3
Dependent Claim
16 words
The copper-base alloy for leadframes according to claim 1, further comprising 0.1-2.0 weight % of Sn.
Claim 4
Dependent Claim
28 words
The copper-base alloy for leadframes according to claim 1, further containing 0.01-2.0 weight % of at least one member selected from the group consisting of Fe and Co.
Claim 5
Dependent Claim
30 words
The copper-base alloy for leadframes according to claim 1, further containing 0.005-0.5 weight % of at least one element selected from the group consisting of Al, Si, Mn and Mg.
Claim 6
Dependent Claim
34 words
The copper-base alloy for leadframes according to claim 1, further containing 0.1-2.0 weight % of Sn and 0.01-2.0 weight % of at least one member selected from the group consisting of Fe and Co.
Claim 7
Dependent Claim
36 words
The copper-base alloy for leadframes according to claim 1, further containing 0.1-2.0 weight % of Sn and 0.005-0.5 weight % of at least one element selected from the group consisting of Al, Si, Mn and Mg.
Claim 8
Dependent Claim
30 words
The copper-base alloy for leadframes according to claim 3, further containing 0.005-0.5 weight % of at least one element selected from the group consisting of Al, Si, Mn and Mg.
Claim 9
Dependent Claim
30 words
The copper-base alloy for leadframes according to claim 5, further containing 0.005-0.5 weight % of at least one element selected from the group consisting of Al, Si, Mn and Mg.
References Cited (Backward Citations)
US2752242A
Cited
SU404589A1
Cited
JPS5053226A
Cited
JPS5423885A
Cited
GB1582428A
Cited
US4366117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-15 | 1990-03-17 | 1990-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-15 | 1994-03-17 | 1994-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-15 | 1998-03-17 | 1998-09-16 | $7700.00 | Window Closed / Lapsed |