Patent US4615951A successfully refreshed from Google Patents.
US4615951A
Expired / Lapsed
US
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Metallized rare earth garnet and metal seals to same
Assignee: Philips North America LLC
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Filing: 1985-09-23
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Granted: 1986-10-07
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Expires: 2005-09-23
Abstract
Abstract A reliable garnet to metal hermetic seal is obtained by metallizing the garnet with successive sputtered layers of tantalum or titanium, molybdenum or tungsten and nickel, followed by soldering or brazing the metallized garnet to a metal member.
Inventors
- 👤 Robert L. Bronnes
- 👤 James K. McKinlay
- 👤 Richard C. Sweet
- 👤 Walter K. Zwicker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:19
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/80; C04B41/81; C04B41/89; C04B37/00; C04B37/02; C04B37/023; C04B37/026; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/125; C04B2237/126; C04B2237/127; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/40; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12611; Y10T428/12618
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
59 words
A metallized garnet comprising a body of garnet having a surface to be bonded, a first layer of a reactive metal sputter deposited on at least a portion of the garnet surface, a second layer of a refractory metal sputter deposited on the first layer, and a third layer of a solderable metal sputter deposited on the second layer.
Claim 2
Dependent Claim
59 words
A metallized garnet comprising a body of garnet having a surface to be bonded, a first layer of a reactive metal sputter deposited on at least a portion of the garnet surface, a second layer of a refractory metal sputter deposited on the first layer, and a third layer of a solderable metal sputter deposited on the second layer.
Claim 3
Dependent Claim
27 words
The metallized garnet of claim 1 in which the reactive metal is selected from the group consisting of tantalum, titanium, vanadium, hafnium, zirconium, niobium and alloys thereof.
Claim 4
Dependent Claim
21 words
The metallized garnet of claim 1 in which the refractory metal is selected from the group consisting of molybdenum and tungsten.
Claim 5
Dependent Claim
13 words
The metallized garnet of claim 1 in which the solderable metal is nickel.
Claim 6
Dependent Claim
32 words
The metallized garnet of claim 1 in which the reactive metal is selected from the group consisting of tantalum and titanium, the refractory metal is molybdenum and the solderable metal is nickel.
Claim 7
Dependent Claim
30 words
The metallized garnet of claim 5 in which the first layer is about one-half micron in thickness and the second and third layers are each about one micron in thickness.
References Cited (Backward Citations)
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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) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |