US3969086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallized gyromagnetic ferrite
Assignee: Varian Medical Systems Inc
•
Filing: 1974-10-08
•
Granted: 1976-07-13
•
Expires: 1994-10-08
Abstract
Abstract A ferrite-to-metal bond suitable for the environment of a high-power microwave circulator is disclosed. The bonding surface of a gyromagnetic ferrite or garnet button is metallized by a sputtering process that deposits successive layers of nichrome, copper and gold thereon. During the sputtering process, a flexible stainless steel band surrounds the button to prevent sputtered material from being deposited on other than the bonding surface of the button. The metallized bonding surface is then soldered to a metal wall of the circulator. The bond so formed is capable of withstanding a peak power level in the circulator of 2.0 megawatts and an average power level of 3.5 kilowatts under standing-wave conditions.
Inventors
- 👤 Victor A. Vaguine
- 👤 Dennis R. Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:30
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/32; H01P1/38; C; C04; C04B; C04B37/00; C04B37/02; C04B37/023; C04B37/026; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/122; C04B2237/124; C04B2237/125; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/40; C04B2237/50; C04B2237/70; C04B2237/708; C04B2237/72; C04B2237/86; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9265; Y10S428/928; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12771; Y10T428/12861; Y10T428/12889; Y10T428/12903; Y10T428/1291; Y10T428/12986
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
106 words
In combination, a body of gyromagnetic ferrite material for causing nonreciprocal trnsmission of microwave power, and a metallic coating, said metallic coating covering a portion of said gyromagnetic ferrite body whereby said body can be affixed by soldering to a metal object, said metallic coating comprising at least three metal layers, a first one of said layers adhering to said gyromagnetic ferrite material and comprising a metal selected from the group consisting of nichrome, molybdenum and chromium, a second one of said layers adhering to said first layer and comprising copper, and a third one of said layers adhering to said second layer and comprising gold.
Claim 2
Dependent Claim
106 words
In combination, a body of gyromagnetic ferrite material for causing nonreciprocal trnsmission of microwave power, and a metallic coating, said metallic coating covering a portion of said gyromagnetic ferrite body whereby said body can be affixed by soldering to a metal object, said metallic coating comprising at least three metal layers, a first one of said layers adhering to said gyromagnetic ferrite material and comprising a metal selected from the group consisting of nichrome, molybdenum and chromium, a second one of said layers adhering to said first layer and comprising copper, and a third one of said layers adhering to said second layer and comprising gold.
Claim 3
Dependent Claim
17 words
The combination of claim 1 wherein said third one of said layers comprises gold dissolved in solder.
Claim 4
Dependent Claim
23 words
The combination of claim 1 wherein said first layer is approximately 10,000 angstroms thick, and said second layer is approximately 30,000 angstroms thick.
Claim 5
Dependent Claim
14 words
The combination of claim 3 wherein said third layer is approximately 10,000 angstroms thick.
Claim 6
Dependent Claim
53 words
A metallized ferrite button comprising a first metal layer adhering to a portion of the surface thereof, said first layer comprising a metal selected from the group consisting of nichrome, molybdenum and chromium; a layer of copper adhering to said first metal layer; and a layer of gold adhering to said copper layer.
Claim 7
Dependent Claim
53 words
A metallized ferrite button comprising a first metal layer adhering to a portion of the surface thereof, said first layer comprising a metal selected from the group consisting of nichrome, molybdenum and chromium; a layer of copper adhering to said first metal layer; and a layer of gold adhering to said copper layer.
References Cited (Backward Citations)
US3505041A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |