US3876437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High insulating glass
Assignee: Hitachi Ltd
•
Filing: 1973-11-19
•
Granted: 1975-04-08
•
Expires: 1993-11-19
Abstract
Abstract This invention relates to a high insulating glass wherein a conventional insulation glass comprising the basis SiO.sub.2 and about 4 to about 23% of alkali metal oxides such as Na.sub.2 O, K.sub.2 O and Li.sub.2 O or alkaline earth metal oxides is mixed and remelted with 2 to 15% of powders of a material or materials which are four coordination number oxides such as B.sub.2 O.sub.3, Al.sub.2 O.sub.3, PbO and Pb.sub.3 O.sub.4 and capable of dissolving into SiO.sub.2 crystal and arresting alkali ions.
Inventors
- 👤 Kanji Otsuka
- 👤 Masao Sekibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:13
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C14/00; C03C14/004; C03C3/089; C03C3/091; C03C3/102; H; H01; H01B; H01B3/00; H01B3/02; H01B3/08; H01B3/087; C03C2214/00; C03C2214/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
113 words
AN ELECTRICALLY INSULATING GLASS STRUCTURE WHICH CONSISTS ESSENTIALLY OF A CONVENTIONAL INSULATION GLASS BASED ON SIO2 AND CONTAINING ABOUT 4 TO ABOUT 23% BY WEIGHT OF ALKALI METAL OXIDES, OR ALKALINE EARTH METAL OXIDES AND ABOUT 2 TO 15% BY WEIGHT OF POWDERED OXIDES SELECTED FROM THE GROUP CONSISTING OF B2O3, AL2O3, PBO, PB3O4 AND MIXTURES THEREOF, SAID POWDERED OXIDES BEING UNIFORMLY SUSPENDED THROUGHOUT SAID INSULATION GLASS AND AT LEAST ONE PART OF EACH OF SAID POWDERED OXIDES BEING DISSOLVED INTO SAID INSULATION GLASS FORMING DISOLVED REGIONS WHICH ARE HIGHLY STABLE WHEREBY THE ALKALI IONS IN THE DISSOLVED REGIONS ARE ARRESTED AND PREVENTED FROM BEING LIBERATED AT ATHE SURFACE OF SAID GLASS STRUCTURE.
Claim 2
Dependent Claim
113 words
AN ELECTRICALLY INSULATING GLASS STRUCTURE WHICH CONSISTS ESSENTIALLY OF A CONVENTIONAL INSULATION GLASS BASED ON SIO2 AND CONTAINING ABOUT 4 TO ABOUT 23% BY WEIGHT OF ALKALI METAL OXIDES, OR ALKALINE EARTH METAL OXIDES AND ABOUT 2 TO 15% BY WEIGHT OF POWDERED OXIDES SELECTED FROM THE GROUP CONSISTING OF B2O3, AL2O3, PBO, PB3O4 AND MIXTURES THEREOF, SAID POWDERED OXIDES BEING UNIFORMLY SUSPENDED THROUGHOUT SAID INSULATION GLASS AND AT LEAST ONE PART OF EACH OF SAID POWDERED OXIDES BEING DISSOLVED INTO SAID INSULATION GLASS FORMING DISOLVED REGIONS WHICH ARE HIGHLY STABLE WHEREBY THE ALKALI IONS IN THE DISSOLVED REGIONS ARE ARRESTED AND PREVENTED FROM BEING LIBERATED AT ATHE SURFACE OF SAID GLASS STRUCTURE.
Claim 3
Dependent Claim
25 words
The high insulating glass of claim 1 in which the alkali metal oxides include Na.sub.2 O, K.sub.2 O, Li.sub.2 O, Rb.sub.2 O, and Cs.sub.2 O.
Claim 4
Dependent Claim
26 words
The insulating glass of claim 1 in which the alkali metal oxides are selected from the group consisting of sodium, potassium and lithium and mixtures thereof.
Claim 5
Dependent Claim
102 words
An electrically insulating glass structure for semiconductor packages consisting essentially of the melt of a conventional SiO.sub.2 based insulation glass containing about 4 to 23% by weight of alkali metal oxides or alkaline earth metal oxides and from about 2 to 15% by weight of at least one powdered oxide selected from the group consisting of B.sub.2 O.sub.3, Al.sub.2 O.sub.3, PbO and Pb.sub.3 O.sub.4, said powdered oxide being suspended uniformly throughout said insulation glass and at least one part of said powdered oxide being dissolved within said insulation glass, forming dissolved regions which are highly stable and capable of arresting alkali ions.
Claim 6
Dependent Claim
102 words
An electrically insulating glass structure for semiconductor packages consisting essentially of the melt of a conventional SiO.sub.2 based insulation glass containing about 4 to 23% by weight of alkali metal oxides or alkaline earth metal oxides and from about 2 to 15% by weight of at least one powdered oxide selected from the group consisting of B.sub.2 O.sub.3, Al.sub.2 O.sub.3, PbO and Pb.sub.3 O.sub.4, said powdered oxide being suspended uniformly throughout said insulation glass and at least one part of said powdered oxide being dissolved within said insulation glass, forming dissolved regions which are highly stable and capable of arresting alkali ions.
Claim 7
Dependent Claim
33 words
The insulating glass of claim 4 in which the alkali metal oxides are selected from the group consisting of Na.sub.2 O, K.sub.2 O, Li.sub.2 O, Rb.sub.2 O and Cs.sub.2 O and mixtures thereof.
Claim 8
Dependent Claim
80 words
An insulating glass structure consisting essentially of 2 to 15% by weight of particles of oxides selected from the group consisting of B.sub.2 O.sub.3, Al.sub.2 O.sub.3, PbO, Pb.sub.3 O.sub.4 and mixtures thereof, and a remelted glass comprising mainly SiO.sub.2 and containing alkali metal oxides or alkaline earth metal oxides by 4 to 23 weight percent, said remelted glass surrounding said particles in which said particles are partially dissolved, the dissolved particles being highly stable whereby alkali ions are arrested therein.
Claim 9
Dependent Claim
80 words
An insulating glass structure consisting essentially of 2 to 15% by weight of particles of oxides selected from the group consisting of B.sub.2 O.sub.3, Al.sub.2 O.sub.3, PbO, Pb.sub.3 O.sub.4 and mixtures thereof, and a remelted glass comprising mainly SiO.sub.2 and containing alkali metal oxides or alkaline earth metal oxides by 4 to 23 weight percent, said remelted glass surrounding said particles in which said particles are partially dissolved, the dissolved particles being highly stable whereby alkali ions are arrested therein.
Claim 10
Dependent Claim
93 words
The glass structure of claim 6 wherein said particles of oxides are selected from the group consisting of (a) 10% by weight of B.sub.2 O.sub.3, (b) 5% by weight of PbO, (c) 10% by weight of Al.sub.2 O.sub.3 and 5% by weight of PbO, (d) 1% by weight of B.sub.2 O.sub.3 and 1% by weight of PbO, (e) 5% by weight of B.sub.2 O.sub.3 and 2% by weight of Al.sub.2 O.sub.3, (f) 5% by weight of Al.sub.2 O.sub.3, and (g) 5% by weight of Al.sub.2 O.sub.3 and 2% by weight of Pb.sub.3 O.sub.4.
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) | 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 |