US4146655A
Expired / Lapsed
US
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Method for encapsulating a semiconductor diode
Assignee: Motorola Solutions Inc
•
Filing: 1978-06-26
•
Granted: 1979-03-27
•
Expires: 1998-06-26
Abstract
Abstract An improved method for encapsulating a semiconductor diode wherein a semiconductor chip and a pair of leads are surrounded by an insulating glass. The improvement comprising the providing of an alkaline free low temperature encapsulating glass for semiconductors consisting essentially of 11-15 weight percent silica, 7-11 weight percent alumina, 63-68 weight percent lead oxide, 4-10 weight percent lead fluoride and 5-10 weight percent borate.
Inventors
- 👤 Earl K. Davis
- 👤 Richard L. Greeson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:55
CPC Classifications
H; H10; H10W; H10W74/00; H10W74/01; C; C03; C03C; C03C3/00; C03C3/04; C03C3/062; C03C3/07; C03C3/072; C03C8/00; C03C8/24; C03C8/245; H01; H01B; H01B3/00; H01B3/02; H01B3/08; H01B3/087; H10W74/40; H10W74/43
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
63 words
In a method of encapsulating a semiconductor diode wherein a semiconductor chip and a pair of leads are surrounded by an insulating glass, the improvement comprising the step of: providing an alkali free low temperature encapsulating glass consisting essentially of 11-15 weight percent silica, 7-11 weight percent alumina, 63-68 weight percent lead oxide, 4-10 weight percent lead fluoride, and 5-10 weight percent borate.
Claim 2
Dependent Claim
63 words
In a method of encapsulating a semiconductor diode wherein a semiconductor chip and a pair of leads are surrounded by an insulating glass, the improvement comprising the step of: providing an alkali free low temperature encapsulating glass consisting essentially of 11-15 weight percent silica, 7-11 weight percent alumina, 63-68 weight percent lead oxide, 4-10 weight percent lead fluoride, and 5-10 weight percent borate.
Claim 3
Dependent Claim
30 words
A method as recited in claim 1 wherein the glass composition is, in weight percent: ______________________________________
SiO.sub.2 13
Al.sub.2 O.sub.3
9
PbO 67
PbF.sub.2 5
B.sub.2 0.sub.3
16
100
______________________________________
Claim 4
Dependent Claim
30 words
A method as recited in claim 1 wherein the glass composition is, in weight percent: ______________________________________
SiO.sub.2 13
Al.sub.2 O.sub.3
7
PbO 64
PbF.sub.2 8
B.sub.2 O.sub.3
8
100
______________________________________
References Cited (Backward Citations)
US2393448A
Cited
US2643020A
Cited
US3546013A
Cited
US3303399A
Cited
US3533832A
Cited
US3545989A
Cited
US3752701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |