US3966449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing glass composition and process
Assignee: International Business Machines Corp
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Filing: 1975-02-10
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Granted: 1976-06-29
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Expires: 1995-02-10
Abstract
Abstract A low temperature glass frit seal composition and process employs a paste including particulate lead glass, an organic vehicle, and small amounts of finely divided TiO 2 . The TiO 2 prevents attack by residual organic vehicle on the lead glass during sealing and adjusts the coefficient of thermal expansion to be compatible with the substrate glass.
Inventors
- 👤 Betty Jane Foster
- 👤 Rao Ramamohana Tummala
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:16
CPC Classifications
C; C03; C03C; C03C27/00; C03C3/00; C03C3/04; C03C3/062; C03C3/07; C03C3/072; C03C3/074; C03C3/0745; C03C8/00; C03C8/24; C03C8/245
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
A glass sealing composition comprising a paste including; particles of a lead glass, said glass having a composition of, by weight, from about 66% to about 76% PbO, from about 8.6% to about 14% B 2 O 3 , from about 10% to about 12% ZnO, from about 2% to about 4% SiO 2 , from about 0.7% to about 2% BaO, from 0 to about 5.0% CuO, from 0 to about 1.7% Al 2 O 3 , and from 0 to about 0.2% Na 2 O; from about 1 to about 3% by weight of said glass of finely divided TiO 2 ; and from about 5 to about 20% by weight based on the total weight of paste of terpineol.
Claim 2
Dependent Claim
122 words
A glass sealing composition comprising a paste including; particles of a lead glass, said glass having a composition of, by weight, from about 66% to about 76% PbO, from about 8.6% to about 14% B 2 O 3 , from about 10% to about 12% ZnO, from about 2% to about 4% SiO 2 , from about 0.7% to about 2% BaO, from 0 to about 5.0% CuO, from 0 to about 1.7% Al 2 O 3 , and from 0 to about 0.2% Na 2 O; from about 1 to about 3% by weight of said glass of finely divided TiO 2 ; and from about 5 to about 20% by weight based on the total weight of paste of terpineol.
Claim 3
Dependent Claim
171 words
A process for forming a solid sealing glass layer on a surface comprising the steps of: forming a paste layer, said paste including; particles of a lead glass, said lead glass having a composition of, by weight, from about 66% to about 76% PbO, from about 8.6% to about 14% B 2 O 3 , from about 10% to about 12% ZnO, from about 2% to about 4% SiO 2 , from about 0.7% to about 2% BaO, from 0 to about 5.0% CuO, from 0 to about 1.7% Al 2 O 3 , and from 0 to about 0.2% Na 2 O; from about 1 to about 3% by weight of said glass of finely divided TiO 2 ; and from about 5 to about 20% by weight based on the total weight of paste of terpineol; drying said paste layer, and; firing said paste layer in contact with said surface at a temperature sufficient to remove the terpineol and fuse the glass particles into a solid sealing glass layer.
Claim 4
Dependent Claim
171 words
A process for forming a solid sealing glass layer on a surface comprising the steps of: forming a paste layer, said paste including; particles of a lead glass, said lead glass having a composition of, by weight, from about 66% to about 76% PbO, from about 8.6% to about 14% B 2 O 3 , from about 10% to about 12% ZnO, from about 2% to about 4% SiO 2 , from about 0.7% to about 2% BaO, from 0 to about 5.0% CuO, from 0 to about 1.7% Al 2 O 3 , and from 0 to about 0.2% Na 2 O; from about 1 to about 3% by weight of said glass of finely divided TiO 2 ; and from about 5 to about 20% by weight based on the total weight of paste of terpineol; drying said paste layer, and; firing said paste layer in contact with said surface at a temperature sufficient to remove the terpineol and fuse the glass particles into a solid sealing glass layer.
Claim 5
Dependent Claim
218 words
In a process for forming a gas panel, in which two substrates having conductor metallurgy formed on facing surfaces are joined together by an adherent glass sealing layer which provide a gas-tight chamber between the substrates, the improvement which comprises: forming the seal by applying to the periphery of at least one of the facing surfaces of said substrates a glass frit paste sealing composition comprising; particles of a lead glass, said lead glass having a composition of, by weight, from about 66% to about 76% PbO, from about 8.6% to about 14% B 2 O 3 , from about 10% to about 12% ZnO, from about 2% to about 4% SiO 2 , from about 0.7% to about 2% BaO, from 0 to about 5.0% CuO, from 0 to about 1.7% Al 2 O 3 , and from 0 to about 0.2% Na 2 O; from about 1 to about 3% by weight of said glass of finely divided TiO 2 ; and from about 5 to about 20% by weight based on the total weight of sealing composition of terpineol; drying said sealing composition and; firing said sealing composition in contact with both facing surfaces of said substrates at a temperature sufficient to remove the terpineol and fuse said composition into an adherent glass sealing layer.
Claim 6
Dependent Claim
218 words
In a process for forming a gas panel, in which two substrates having conductor metallurgy formed on facing surfaces are joined together by an adherent glass sealing layer which provide a gas-tight chamber between the substrates, the improvement which comprises: forming the seal by applying to the periphery of at least one of the facing surfaces of said substrates a glass frit paste sealing composition comprising; particles of a lead glass, said lead glass having a composition of, by weight, from about 66% to about 76% PbO, from about 8.6% to about 14% B 2 O 3 , from about 10% to about 12% ZnO, from about 2% to about 4% SiO 2 , from about 0.7% to about 2% BaO, from 0 to about 5.0% CuO, from 0 to about 1.7% Al 2 O 3 , and from 0 to about 0.2% Na 2 O; from about 1 to about 3% by weight of said glass of finely divided TiO 2 ; and from about 5 to about 20% by weight based on the total weight of sealing composition of terpineol; drying said sealing composition and; firing said sealing composition in contact with both facing surfaces of said substrates at a temperature sufficient to remove the terpineol and fuse said composition into an adherent glass sealing layer.
References Cited (Backward Citations)
US3744702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |