US3666913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of bonding a component lead to a copper etched circuit board lead
Assignee: Texas Instruments Inc
•
Filing: 1966-09-14
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Granted: 1972-05-30
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Expires: 1986-09-14
Abstract
Abstract This invention provides a method for bonding a copper etched circuit board lead to a component lead while eliminating blow out of the copper lead by applying an oxide to the copper lead which is relatively non-conductive at temperatures below the welding temperature but decomposible at the welding temperature. Because of the insulating properties of the oxide, a larger current passes through the component lead than the copper lead, allowing the component lead to be preheated to the bonding temperature, decomposing the oxide and thereby bonding the copper lead to the preheated component lead.
Inventors
- 👤 James F Haefling
- 👤 Lawrence L Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:23
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/10; B23K11/11; H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/328; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49169
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
reducing said oxide, and
Claim 2
Dependent Claim
33 words
causing said second current to become larger than said first current, thereby raising the temperature of said copper etched lead and effecting a bond between said component lead and said copper etched lead.
References Cited (Backward Citations)
GB814527A
Cited
US3190771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |