US4394679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light emitting device with a continuous layer of copper covering the entire header
Assignee: RCA Corp
•
Filing: 1980-09-15
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Granted: 1983-07-19
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Expires: 2000-09-15
Abstract
Abstract The invention is an improved light emitting device comprising a light emitting element mounted on a header wherein the improvement comprises a thin layer of copper overlying the surface of the header including both the base and the stud. A large increase in the yield of useable devices is obtained for a light emitting element mounted on the header which emits between about 1.0 and about 1.7 micrometers.
Inventors
- 👤 Frank Z. Hawrylo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:32
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/85; H10H20/858; H10H20/8582; H10H20/8585
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
In a light emitting device which comprises: a base plate having two major surfaces; a stud axially mounted on a first major surface; a copper block mounted on the second major surface of the base plate; and a light emitting element mounted on the copper block; the improvement which comprises: a continuous layer of copper between about 5 and about 125 micrometers thick covering the base, the copper block and the stud.
Claim 2
Dependent Claim
72 words
In a light emitting device which comprises: a base plate having two major surfaces; a stud axially mounted on a first major surface; a copper block mounted on the second major surface of the base plate; and a light emitting element mounted on the copper block; the improvement which comprises: a continuous layer of copper between about 5 and about 125 micrometers thick covering the base, the copper block and the stud.
Claim 3
Dependent Claim
21 words
A light emitting device according to claim 1 wherein the copper layer is between about 5 and about 50 micrometers thick.
Claim 4
Dependent Claim
33 words
A light emitting device according to claim 1 wherein the light emitting element is composed of group III-V materials which emit light having a wavelength between about 1.0 micrometer and about 1.7 micrometers.
Claim 5
Dependent Claim
49 words
A light emitting device according to claim 1 further comprising a cover having a window mounted therein mounted on the base plate which encloses the light emitting element; wherein the window is so positioned in the cover that a light beam emitted by the element passes through the window.
Claim 6
Dependent Claim
52 words
In a header which comprises: a base plate having two major surfaces; a stud axially mounted to a first major surface; and a copper block mounted on the second major surface; the improvement which comprises: a continuous layer of copper between about 5 and about 125 micrometers thick covering the entire header.
Claim 7
Dependent Claim
52 words
In a header which comprises: a base plate having two major surfaces; a stud axially mounted to a first major surface; and a copper block mounted on the second major surface; the improvement which comprises: a continuous layer of copper between about 5 and about 125 micrometers thick covering the entire header.
Claim 8
Dependent Claim
19 words
A header according to claim 1 wherein the copper layer is between about 5 and about 50 micrometers thick.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |