US3801878A
Expired / Lapsed
US
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Glass switching device using an ion impermeable glass active layer
Assignee: INNOTECH CORP
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Filing: 1971-03-09
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Granted: 1974-04-02
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Expires: 1991-03-09
Abstract
Abstract A glass electronic switching device having improved long-term reliability comprises a thin layer of an ion impermeable glass disposed between a pair of electrical contacts. Preferably the glass is an insulating glass having a thermal coefficient of expansion compatible with typical crystalline semiconductors, and the glass layer typically has a thickness of less than about five microns. These glass switches can be readily incorporated into high-density integrated circuits using planar techniques. When sufficiently thin glass layers are used, the same glass layer which comprises the active layer of the switching device can also comprise a masking layer to facilitate the fabrication of conventional diffused junction devices, a dielectric layer for the fabrication of surface effect devices, and a passivating layer to protect an underlying crystalline semiconductor substrate.
Inventors
- 👤 S Merrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:08
CPC Classifications
H; H10; H10D; H10D48/00; H10D48/30; H10D48/38; H10D48/381; H10B; H10B63/00; H10B63/10; H10D1/00; H10D1/60; H10D1/62; H10D1/66; H10N; H10N70/00; H10N70/011; H10N70/021; H10N70/026; H10N70/20; H10N70/801; H10N70/821; H10N70/826; H10N70/881; H10N70/883; H10W; H10W74/00; H10W74/40; H10W74/43
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
39 words
A device according to claim 1 wherein said insulating glass is an ionically impermeable glass comprised of 50 mole per cent or more of one or more phases selected from the group consisting of PbSiO3, Pb6Al2Si6O21, ZnB2O4, and Zn2SiO4.
Claim 2
Dependent Claim
39 words
A device according to claim 1 wherein said insulating glass is an ionically impermeable glass comprised of 70 mole per cent or more of one or more phases selected from the group consisting of PbSiO3, Pb6Al2Si6O21, ZnB2O4, and Zn2SiO4.
Claim 3
Dependent Claim
28 words
A device according to claim 1 wherein said glass is predominantly comprised of one or more phases selected from the group consisting of PbSiO3, Pb6Al2Si6O21, ZnB2O4, and Zn2SiO4.
Claim 4
Dependent Claim
19 words
A device according to claim 1 additionally characterized in that said glass layer is less than 2 microns thick.
Claim 5
Dependent Claim
19 words
A device according to claim 1 additionally characterized in that said glass layer is less than 1 micron thick.
Claim 6
Dependent Claim
19 words
A device according to claim 1 additionally characterized in that one of said electrodes is a doped crystalline semiconductor.
Claim 7
Dependent Claim
99 words
A glass switching device according to claim 1 comprising a layer of glass disposed between a pair of electrodes, said device characterized in that said glass is made from the following components in the following mole percentage ranges: SiO2 - 3-12 - mole per cent ZnO - 45-65 - mole per cent PbO - 0-6 - mole per cent B2O3 - 25-40 - mole per cent Al2O3 - 0-3 - mole per cent wherein calcium oxide, barium oxide, or strontium oxide or a mixture thereof can be substituted for ZnO in an amount up to 10 mole per cent.
Claim 8
Dependent Claim
88 words
A glass switching device according to claim 1 comprising a layer of glass disposed between a pair of electrodes, said device characterized in that said glass is made from the following components in the following mole percentage ranges: SiO2 - 55-65 - mole per cent PbO - 30-40 - mole per cent Al2O3 - 0-7 - mole per cent wherein B2O3, V2O5, or P2O5 or a mixture thereof can be substituted for SiO2 and ZnO can be substituted for PbO, each substitution limited to 20 mole per cent.
Claim 9
Dependent Claim
88 words
A glass switching device according to claim 1 comprising a layer of glass disposed between a pair of electrodes, said device characterized in that said glass is made from the following components in the following mole percentage ranges: SiO2 - 35-55 - mole per cent PbO - 35-60 - mole per cent Al2O3 - 0-20 - mole per cent wherein B2O3, V2O5, or P2O5 or a mixture thereof can be substituted for SiO2 and ZnO can be substituted for PbO, each substitution limited to 20 mole per cent.
Claim 10
Dependent Claim
98 words
A glass switching device according to claim 1 comprising a layer of glass disposed between a pair of electrodes, said device characterized in that said glass is made from the following components in the following mole percentage ranges: SiO2 - 5-15 - mole per cent ZnO - 50-65 - mole per cent B2O3 - 25-35 - mole per cent wherein calcium oxide, barium oxide, strontium oxide or a mixture thereof can be substituted for ZnO in amounts up to 10 mole per cent, and PbO can be substituted for ZnO in amounts up to 20 mole per cent.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |