US3647533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substrate bonding bumps for large scale arrays
Assignee: United States Department of the Navy
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Filing: 1969-08-08
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Granted: 1972-03-07
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Expires: 1989-08-08
Abstract
Abstract A method for producing reliable bonding bumps on large-scale array substrates and hybrid add-on components, the present invention is compatible with a wide variety of microcircuit components. Generally, the method envisions fabrication of bonding bumps by thin-film vacuum deposition through a mechanical mask. In particular, a first metal is deposited on a substrate to a desired thickness whereupon said first metal is then codeposited with a second metal. The bump is completed with the sole deposition of the second metal. A bump thus produced may be further processed to produce a ''''solder-dipped bump'''' or may be used in the thin-film state for component mounting.
Inventors
- 👤 Robert E Hicks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:32
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/40; H05K3/4007; H10; H10W; H10W90/00; H05K2201/00; H05K2201/03; H05K2201/0302; H05K2201/0317; H05K2201/0332; H05K2201/0364; H05K2201/0367; H05K3/10; H05K3/14; H05K3/143; H10W72/00; H10W72/071; H10W72/072; H10W72/07231; H10W72/07236; H10W72/20; H10W72/251; H10W72/252; Y; Y10; Y10S; Y10S428/00; Y10S428/901
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
20 words
The method of claim 1 wherein said first conductive substance comprises chromium metal and the second conductive substance comprises tin.
Claim 2
Dependent Claim
20 words
The method of claim 1 wherein said first conductive substance comprises chromium metal and the second conductive substance comprises copper.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein said first conductive substance comprises chromium metal and the second conductive substance comprises gold.
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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |