US4002799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass sealed products
Assignee: Technology Glass Corp
•
Filing: 1976-02-17
•
Granted: 1977-01-11
•
Expires: 1996-02-17
Abstract
Abstract Sealed semiconductor packages and the like and a method of making them are described. The sealant compositions employed are mixtures of finely divided solder glass and an oxygen containing zinc material. The solder glasses are either lead-boron glasses or lead-zinc-boran glasses in which the zinc-lead mol ratio is below 1:2.
Inventors
- 👤 Maurice E. Dumesnil
- 👤 Ulrich Schreier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:54
CPC Classifications
C; C03; C03C; C03C10/00; C03C10/0054; C03C27/00; C03C3/00; C03C3/12; C03C3/14; C03C3/142; C03C8/00; C03C8/24; C04; C04B; C04B37/00; C04B37/003; C04B37/005; C04B37/02; C04B37/023; C04B37/025; C04B37/04; C04B37/045; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6562; C04B2235/6565; C04B2235/6567; C04B2235/66; C04B2235/661; C04B2235/662; C04B2237/00; C04B2237/02; C04B2237/04; C04B2237/09; C04B2237/10; C04B2237/30; C04B2237/32; C04B2237/34; C04B2237/343; C04B2237/40; C04B2237/50; C04B2237/52; C04B2237/525; C04B2237/70; C04B2237/708
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
132 words
The method of sealing ceramic, glass or metal bodies together which comprises sandwiching a mixture of a finely divided solder glass selected from the group consisting of lead-boron glasses and zinc-lead-boron glasses in which the zinc oxide:lead oxide mol ratio is below 1:2 and a finely divided oxygen containing zinc material selected from the group consisting of zinc silicate, zinc zirconium silicate, zinc oxide, zinc aluminate, zinc zirconate, zinc stannate, zinc zirconium aluminum silicate and mixtures thereof, the zinc material being present in amount in the range 3 to 30% by weight of the total mixture, between the bodies, heating the resultant assembly to a temperature at which the mixture softens and wets the bodies, holding the assembly at such temperature for several minutes and then cooling the assembly to ambient temperature.
Claim 2
Independent Claim
132 words
The method of sealing ceramic, glass or metal bodies together which comprises sandwiching a mixture of a finely divided solder glass selected from the group consisting of lead-boron glasses and zinc-lead-boron glasses in which the zinc oxide:lead oxide mol ratio is below 1:2 and a finely divided oxygen containing zinc material selected from the group consisting of zinc silicate, zinc zirconium silicate, zinc oxide, zinc aluminate, zinc zirconate, zinc stannate, zinc zirconium aluminum silicate and mixtures thereof, the zinc material being present in amount in the range 3 to 30% by weight of the total mixture, between the bodies, heating the resultant assembly to a temperature at which the mixture softens and wets the bodies, holding the assembly at such temperature for several minutes and then cooling the assembly to ambient temperature.
Claim 3
Dependent Claim
28 words
The method defined in claim 1 wherein 2 to 5% by weight of lead fluoride is added to the mixture of solder glass and oxygen containing zinc material.
Claim 4
Dependent Claim
6 words
Assemblies produced according to claim 1.
Claim 5
Dependent Claim
141 words
A glass, metal or ceramic body having its surface covered by a hermetic sealing coat formed by covering its surface with a mixture comprised of a finely divided solder glass selected from the group consisting of lead-boron glasses and zinc-lead-boron glasses in which the zinc oxide:lead oxide mol ratio is below 1:2 and a finely divided oxygen containing zinc material selected from the group consisting of zinc silicate, zinc zirconium silicate, zinc oxide, zinc aluminate, zinc zirconate, zinc stannate, zinc zirconium aluminum silicate and mixtures thereof, the zinc material being present in an amount in the range 3 to 30% by weight of the total mixture, heating the thus covered body to a temperature at which the covering mixture softens and wets the body surface, holding the body at such temperature for several minutes and then cooling it to ambient temperature.
Claim 6
Dependent Claim
141 words
A glass, metal or ceramic body having its surface covered by a hermetic sealing coat formed by covering its surface with a mixture comprised of a finely divided solder glass selected from the group consisting of lead-boron glasses and zinc-lead-boron glasses in which the zinc oxide:lead oxide mol ratio is below 1:2 and a finely divided oxygen containing zinc material selected from the group consisting of zinc silicate, zinc zirconium silicate, zinc oxide, zinc aluminate, zinc zirconate, zinc stannate, zinc zirconium aluminum silicate and mixtures thereof, the zinc material being present in an amount in the range 3 to 30% by weight of the total mixture, heating the thus covered body to a temperature at which the covering mixture softens and wets the body surface, holding the body at such temperature for several minutes and then cooling it to ambient temperature.
Claim 7
Dependent Claim
20 words
Glass, metal or ceramic bodies having their surfaces coated with a hermetic seal according to the method of claim 2.
Claim 8
Dependent Claim
93 words
A printing paste comprising a mixture of a finely divided solder sealing glass selected from the group consisting of lead-boron glasses and lead-zinc-boron glasses in which the zinc oxide:lead oxide ratio is below 1:2 and a finely divided oxygen containing zinc material selected from the group consisting of zinc silicate, zinc zirconium silicate, zinc oxide, zinc aluminate, zinc zirconate, zinc stannate, zinc zirconium aluminum silicate and mixtures thereof, the zinc material being present in amount in the range 3 to 30% by weight of the total mixture, dispersed in an organic liquid vehicle.
Claim 9
Dependent Claim
93 words
A printing paste comprising a mixture of a finely divided solder sealing glass selected from the group consisting of lead-boron glasses and lead-zinc-boron glasses in which the zinc oxide:lead oxide ratio is below 1:2 and a finely divided oxygen containing zinc material selected from the group consisting of zinc silicate, zinc zirconium silicate, zinc oxide, zinc aluminate, zinc zirconate, zinc stannate, zinc zirconium aluminum silicate and mixtures thereof, the zinc material being present in amount in the range 3 to 30% by weight of the total mixture, dispersed in an organic liquid vehicle.
Claim 10
Dependent Claim
18 words
The paste defined in claim 6 wherein the solid: liquid ratio is in the range 12:1 to 7:1.
References Cited (Backward Citations)
US3061664A
Cited
US3250631A
Cited
US3462252A
Cited
US3258350A
Cited
US3778242A
Cited
US3645761A
Cited
US3755720A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |