US4905074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interdiffusion resistant Fe-Ni alloys having improved glass sealing property
Assignee: Olin Corp
•
Filing: 1986-11-24
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Granted: 1990-02-27
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Expires: 2006-11-24
Abstract
Abstract The present invention relates to an iron-nickel alloy containing from about 30% to about 60% nickel, from 0.001% to about 0.15% nitrogen, at least one element selected from the group consisting of from about 1% to about 10% molybdenum and from about 0.001% to about 2% aluminum and the balance essentially iron. The alloys demonstrate improved resistance to intermediate compound formation, improved glass to metal sealing properties, and improved wirebonding performance. The alloys of the present invention have particular utility as a lead frame material for semiconductor packages.
Inventors
- 👤 Chung-Yao Chao
- 👤 John F. Breedis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:11
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/40; H10W70/456; C; C22; C22C; C22C38/00; C22C38/08; H10W72/00; H10W72/50; H10W72/551; H10W72/552; H10W72/5524; H10W90/00; H10W90/701; H10W90/751; H10W90/756
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
57 words
A structure having: a component formed from a single phase alloy consisting essentially of from about 30% to about 60% nickel, from about 0.001% to about 0.15% nitrogen, at least one element selected from the group of from about 1% to about 10% molybdenum and from about 0.001% to about 2% aluminum, and the balance essentially iron.
Claim 2
Dependent Claim
57 words
A structure having: a component formed from a single phase alloy consisting essentially of from about 30% to about 60% nickel, from about 0.001% to about 0.15% nitrogen, at least one element selected from the group of from about 1% to about 10% molybdenum and from about 0.001% to about 2% aluminum, and the balance essentially iron.
Claim 3
Dependent Claim
21 words
The structure of claim 1 further comprising: at least one aluminum or aluminum alloy component bonded to said iron-nickel alloy component.
Claim 4
Dependent Claim
20 words
The structure of claim 1 further comprising: at least one layer of non-metallic material bonded to said iron-nickel alloy component.
Claim 5
Dependent Claim
13 words
The structure of claim 3 wherein said non-metallic material comprises a glass material.
Claim 6
Dependent Claim
41 words
The structure of claim 2 wherein: said structure comprises a semiconductor package; said iron-nickel alloy component comprises at least one lead of a lead frame; and said at least one aluminum or aluminum alloy component comprises at least one lead wire.
Claim 7
Dependent Claim
16 words
The structure of claim 5 further comprising: said lead frame being entirely formed from said alloy.
Claim 8
Dependent Claim
19 words
The structure of claim 6 further comprising: each said lead wire being formed from a silicon containing aluminum alloy.
Claim 9
Dependent Claim
25 words
The structure of claim 5 further comprising: a semiconductor device; and each said lead being connected to said device by at least one lead wire.
Claim 10
Dependent Claim
23 words
The structure of claim 6 further comprising: at least one layer of a glass sealing material bonded to said iron-nickel alloy lead frame.
Claim 11
Dependent Claim
47 words
The structure of claim 9 further comprising: at least one component formed from a ceramic material, said iron-nickel alloy lead frame being bonded to said at least one ceramic material component by said at least one glass sealing material layer so as to form a hermetic package.
Claim 12
Dependent Claim
59 words
The structure of claim 1 having a component formed from an alloy consisting essentially of from about 39% to about 55% nickel, from about 0.005% to about 0.05% nitrogen, at least one element selected from the group consisting of about 1% to about 4% molybdenum, about 0.3% to about 1.0% aluminum or combinations thereof, and the balance essentially iron.
Claim 13
Dependent Claim
61 words
The structure of claim 1 having a component formed from a chromium free alloy consisting essentially of from about 30% to about 60% nickel, from about 0.00% to about 0.15% nitrogen, at least one element selected from the group consisting of from about 1% to about 10% molybdenum and from about 0.001% to about 2% aluminum, and the balance essentially iron.
Claim 14
Dependent Claim
61 words
The structure of claim 12 having a component formed from a chromium free alloy consisting essentially of from about 39% to about 55% nickel, from about 0.005% to about 0.05% nitrogen, at least one element selected from the group consisting of about 1% to about 4% molybdenum, about 0.3% to about 1.0% aluminum or combinations thereof, and the balance essentially iron.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-26 | 1993-08-28 | 1994-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-26 | 1997-08-28 | 1998-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-26 | 2001-08-28 | 2002-02-27 | $7700.00 | Window Closed / Lapsed |