Patent US5334346A successfully refreshed from Google Patents.
US5334346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper alloys for electrical and electronic parts
Assignee: Poongsan Corp
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Filing: 1993-02-18
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Granted: 1994-08-02
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Expires: 2013-02-18
Abstract
Abstract This invention relates to a high performance copper alloy and its manufacturing methods for electrical and electronic parts which have good electrical conductivity, superior mechanical properties, and high thermal stability of tin-lead plating. The copper alloy consisting essentially of copper and from copper-nickel-silicon-phosphor-magnesium alloys for semiconductor leadframe alloys consisting essentially of copper and from 0.5 to 2.4% by weight nickel, from 0.1 to 0.5% by weight silicon, from 0.02 to 0.16% by weight phosphorus, and from 0.02 to 0.2% by weight magnesium.
Inventors
- 👤 Young G. Kim
- 👤 In Y. Hwang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:32
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
47 words
A copper alloy having high strength, enhanced ductility, and good electrical conductivity consisting essentially from about 0.5 to 2.4% by weight nickel, from 0.1 to 0.5% by weight silicon, from about 0.02 to 0.16% by weight phosphorus from 0.02 to 0.2% by weight magnesium and balance copper.
Claim 2
Dependent Claim
47 words
A copper alloy having high strength, enhanced ductility, and good electrical conductivity consisting essentially from about 0.5 to 2.4% by weight nickel, from 0.1 to 0.5% by weight silicon, from about 0.02 to 0.16% by weight phosphorus from 0.02 to 0.2% by weight magnesium and balance copper.
Claim 3
Dependent Claim
11 words
A semiconductor leadframe comprising the copper alloy according to claim 1.
Claim 4
Dependent Claim
14 words
A connector for electric or electronic parts comprising the alloy according to claim 1.
Claim 5
Dependent Claim
18 words
An alloy according to to claim 1, wherein about 1 weight percent zinc is added to said alloy.
Claim 6
Dependent Claim
21 words
An alloy according to claim 1, wherein below 1 weight percent iron is added to substitute for a portion of nickel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-01 | 1998-01-31 | 1998-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-01 | 2002-01-31 | 2002-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-01 | 2006-01-31 | 2006-08-02 | $7700.00 | Window Closed / Lapsed |