US3876408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Connections between glass and silicon or silicon carbide
Assignee: Siemens AG
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Filing: 1973-05-31
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Granted: 1975-04-08
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Expires: 1993-05-31
Abstract
Abstract An improved technique for producing connections between crystalline silicon or silicon carbide components and glass components so as to produce gas-tight connections between such different components. The resulting connections can not only support a mechanical load, but also are resistant to high temperatures. The glass used has a linear coefficient of thermal expansion which differs from that of the silicon or silicon carbide by not more than about 20%.
Inventors
- 👤 Karl Heinz Geyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:49
CPC Classifications
C; C04; C04B; C04B37/00; C04B37/04; C04B37/042; C03; C03C; C03C27/00; C03C27/02; C04B2235/00; C04B2235/65; C04B2235/658; C04B2235/6583; C04B2237/00; C04B2237/30; C04B2237/32; C04B2237/36; C04B2237/365; C04B2237/50; C04B2237/76; C04B2237/765; C04B2237/78; C04B2237/80; C04B2237/84
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
166 words
A METHOD OF PRODUCING A GAS TIGHT, LOAD BEARABLE, HIGH TEMPERATURE RESISTANT BOND BETWEEN TWO SHAPED BODIES COMPRISING THE STEPS OF A. DIRECTLY CONTACING A SURFACE OF A PREFORMED COMPONENT COMPRISING OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CRYSTALLINE SILICON AND CRYSTALLINE SILICON CARBIDE WITH A SURFACE OF A PERFORMED GLASS BODY COMPRISED OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF BOROSILICATE GLASSES, SAID GLASS BODY HAVING A LINEAR COEFFICIENT OF THERMAL EXPANSION WHICH DIFFERS FROM THAT OF SAID COMPONENT BY OT MORE THAN ABOUT +20% AT TEMPERATURES RANGING UP TO ABOUT 300*C. 14 B. HEATING SAID GLASS BODY AND SAID COMPONENT IN AIR AT THE REGION OF SAID CONTACTING SURFACES TO A TEMPERATURE AND FOR A TIME SUFFICIENT TO CAUSE LOCALIZED MELTING OF SAID GLASS BODY AND TO PRODUCE A LAYER OF SILICON DIOXIDE ON THE CONTACTING SURFACE OF SAID COMPONENT, AND C. FUSING SAID MOLTEN GLASS BODY CONTACTING SURFACE WITH SAID COMPONENT CONTACTING SURFACE TO PRODUCE BONDING BETWEEN SAID CONTACTING SURFACES.
Claim 2
Independent Claim
166 words
A METHOD OF PRODUCING A GAS TIGHT, LOAD BEARABLE, HIGH TEMPERATURE RESISTANT BOND BETWEEN TWO SHAPED BODIES COMPRISING THE STEPS OF A. DIRECTLY CONTACING A SURFACE OF A PREFORMED COMPONENT COMPRISING OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CRYSTALLINE SILICON AND CRYSTALLINE SILICON CARBIDE WITH A SURFACE OF A PERFORMED GLASS BODY COMPRISED OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF BOROSILICATE GLASSES, SAID GLASS BODY HAVING A LINEAR COEFFICIENT OF THERMAL EXPANSION WHICH DIFFERS FROM THAT OF SAID COMPONENT BY OT MORE THAN ABOUT +20% AT TEMPERATURES RANGING UP TO ABOUT 300*C. 14 B. HEATING SAID GLASS BODY AND SAID COMPONENT IN AIR AT THE REGION OF SAID CONTACTING SURFACES TO A TEMPERATURE AND FOR A TIME SUFFICIENT TO CAUSE LOCALIZED MELTING OF SAID GLASS BODY AND TO PRODUCE A LAYER OF SILICON DIOXIDE ON THE CONTACTING SURFACE OF SAID COMPONENT, AND C. FUSING SAID MOLTEN GLASS BODY CONTACTING SURFACE WITH SAID COMPONENT CONTACTING SURFACE TO PRODUCE BONDING BETWEEN SAID CONTACTING SURFACES.
Claim 3
Dependent Claim
24 words
A method as claimed in claim 1, wherein said component is made of silicon, and said glass body is made of an aluminoborosilicate glass.
Claim 4
Dependent Claim
23 words
The method of claim 1 wherein said component is comprised of silicon carbide and said glass body is comprised of an aluminoborosilicate glass.
Claim 5
Dependent Claim
26 words
The method of claim 1 wherein said component is in the form of a conduit and said region of contacting is substantially at an end thereof.
Claim 6
Dependent Claim
26 words
The method of claim 1 wherein said component is in the form of a conduit and said region of contacting is substantially adjacent an end thereof.
Claim 7
Dependent Claim
51 words
The method of claim 4 wherein said glass body so contacted with said component is in the form of a conduit having a cross-sectional configuration at one end thereof, approximating that of said component at said end thereof and said respective ends are abutted together to form a butt-type joint therebetwen.
Claim 8
Dependent Claim
46 words
The method of claim 5 wherein said glass body so contacted with said component is in the form of a conduit having a cross-sectional configuration at one end thereof which is adapted to engage side wall portions of said component to form a lapp-type joint therebetween.
References Cited (Backward Citations)
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US3266526A
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US3408222A
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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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |