US4156250A
Expired / Lapsed
US
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Glass for the passivation of semiconductor devices
Assignee: US Philips Corp
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Filing: 1977-05-04
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Granted: 1979-05-22
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Expires: 1997-05-04
Abstract
Abstract A passivating glass for semiconductor devices. The glass contains GeO2, PbO, SiO2 and Al2O3 and, in addition, a small defined quantity of water.
Inventors
- 👤 Hendrikus J. L. Trap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:10
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/69; H10P14/692; H10P14/6921; H10P14/6928; H10P14/6936; C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/102; C03C3/105; H10P14/69215; H10P14/6929; H10W; H10W74/00; H10W74/10; H10W74/131; H10W74/40; H10W74/43; H10P14/63; H10P14/6326; H10P14/6328; H10P14/6329; H10P14/6342; H10P14/6938; H10P14/6939; H10P14/69391
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
89 words
Glass, containing SiO 2 , PbO and Al 2 O 3 , suitable for use for the passivation of semiconductor devices, consisting essentially of the composition, in mol.% in the range of: ______________________________________
SiO.sub.2 50-75
Al.sub.2 O.sub.3
3.5-20
PbO 7.5-40
GeO.sub.2 3-20
______________________________________ the amount of PbO being greater than the amount of Al 2 O 3 , the glass containing water, expressed in cm 3 of water vapour, reduced to 0° C. and 76 cm Hg per cm 3 of glass between 10×10 -4 and 100×10 -4 .
Claim 2
Dependent Claim
89 words
Glass, containing SiO 2 , PbO and Al 2 O 3 , suitable for use for the passivation of semiconductor devices, consisting essentially of the composition, in mol.% in the range of: ______________________________________
SiO.sub.2 50-75
Al.sub.2 O.sub.3
3.5-20
PbO 7.5-40
GeO.sub.2 3-20
______________________________________ the amount of PbO being greater than the amount of Al 2 O 3 , the glass containing water, expressed in cm 3 of water vapour, reduced to 0° C. and 76 cm Hg per cm 3 of glass between 10×10 -4 and 100×10 -4 .
Claim 3
Dependent Claim
58 words
Glass as claimed in claim 1, consisting essentially of the composition, in mol.% in the range: ______________________________________
SiO.sub.2 50-75
Al.sub.2 O.sub.3 10-20
PbO 10-25
GeO.sub.2 3-20
______________________________________ the glass containing water, expressed in cm 3 in water vapour, reduced to 0° C. and 76 cm Hg per cm 3 of glass between 10×10 -4 and 100×10 -4 .
Claim 4
Dependent Claim
22 words
Glass as claimed in claim 1, wherein the amount of PbO is substantially twice the amount of Al 2 O 3 .
Claim 5
Dependent Claim
15 words
A semiconductor device provided with a coating of passivating glass as claimed in claim 1.
Claim 6
Dependent Claim
26 words
Glass as claimed in claim 1, wherein said composition is derived at least in part from a starting mixture comprising hydrous raw materials including hydrated alumina.
Claim 7
Dependent Claim
22 words
Glass as claimed in claim 1, wherein said glass is melted and homogenized and subsequently quenched at a temperature below room temperature.
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) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |