US5117068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface mount package for R.F. devices
Assignee: MACOM Technology Solutions Holdings Inc
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Filing: 1990-08-17
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Granted: 1992-05-26
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Expires: 2010-08-17
Abstract
Abstract A TO-8 surface-mount package assembly for R.F. and microwave devices is disclosed. The assembly includes a lead-frame positioned beneath an alumina base. The alumina base supports a number of solid metal vias. The vias electrically connect the lead-frame to an R.F. or microwave device which is attached to the vias. The assembly also includes a gold plated Kovar seal-ring positioned over the base. The seal-ring and base are brazed together. A cover is then positioned over the seal-ring and welded to the seal-ring.
Inventors
- 👤 Louis M. Seieroe
- 👤 Kenneth S. Ledford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:52
CPC Classifications
H; H10; H10W; H10W44/00; H10W44/20; H05; H05K; H05K1/00; H05K1/02; H05K1/0213; H05K1/0237; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/341; H05K3/3421
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
87 words
A surface mount TO-8 package assembly for microwave devices comprising a ceramic base, a lead-frame having leads in a TO-8 configuration carried on one face of said base, a plurality of metal vias, positioned in said base, which serve to electrically connect to a device carried at the other face of said base, side walls extending upwardly from said other face of said base, and a cover secured to said side walls to define with said walls and base an enclosure for an R.F. or microwave device.
Claim 2
Dependent Claim
87 words
A surface mount TO-8 package assembly for microwave devices comprising a ceramic base, a lead-frame having leads in a TO-8 configuration carried on one face of said base, a plurality of metal vias, positioned in said base, which serve to electrically connect to a device carried at the other face of said base, side walls extending upwardly from said other face of said base, and a cover secured to said side walls to define with said walls and base an enclosure for an R.F. or microwave device.
Claim 3
Dependent Claim
13 words
The assembly of Claim 1 wherein said lead-frame is goldplated nickel alloy 42.
Claim 4
Dependent Claim
13 words
The assembly of Claim 1 wherein said ceramic base is formed of alumina.
Claim 5
Dependent Claim
13 words
The assembly of Claim 1 wherein said vias are formed of solid metal.
Claim 6
Dependent Claim
20 words
The assembly of Claim 1 wherein said walls are formed of a gold plated Kovar seal-ring positioned above said base.
Claim 7
Dependent Claim
16 words
The assembly of Claim 5 wherein said base and said seal-ring are brazed to one another.
Claim 8
Dependent Claim
16 words
The assembly of Claim 5 wherein said solid nickel cover is seam welded to the seal-ring.
Claim 9
Dependent Claim
101 words
A surface mount TO-8 package assembly for microwave devices, wherein at least one of said devices is positioned in said assembly which comprises an alumina base, a gold plated lead-frame secured to one face of said base and having leads in a TO-8 configuration, a plurality of solid metal vias, positioned in said base, extending from said one face of said base to its other face, said vias electrically connecting a device within said package to said lead-frame, a gold plated Kovar seal-ring, positioned above and brazed to said alumina base, and a cover positioned above and welded to said seal-ring.
Claim 10
Dependent Claim
101 words
A surface mount TO-8 package assembly for microwave devices, wherein at least one of said devices is positioned in said assembly which comprises an alumina base, a gold plated lead-frame secured to one face of said base and having leads in a TO-8 configuration, a plurality of solid metal vias, positioned in said base, extending from said one face of said base to its other face, said vias electrically connecting a device within said package to said lead-frame, a gold plated Kovar seal-ring, positioned above and brazed to said alumina base, and a cover positioned above and welded to said seal-ring.
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) | 1995-05-26 | 1995-11-25 | 1996-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-26 | 1999-11-25 | 2000-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-26 | 2003-11-25 | 2004-05-26 | $7700.00 | Window Closed / Lapsed |