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US3622906A Expired / Lapsed US ⏱️ 0.0 years remaining

Light-emitting diode array

Assignee: RCA Corp
•
Filing: 1967-10-24
•
Granted: 1971-11-23
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Expires: 1987-10-24
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Abstract

Abstract A light-emitting diode array comprises a substrate of insulating material having one side formed with a plurality of steps. A separate row of spaced-apart, similarly oriented diodes is disposed on the tread surface of each of the steps. Corresponding diodes in the different rows are disposed in columns, and the diodes in each of the columns are connected in series. A method of making the light-emitting diode array comprises the operations of (a) forming a plurality of steps in one side of a substrate of insulating material, (b) disposing a sheet of metal, including solder, on each of the tread surfaces, each sheet having a rear portion on a tread surface and a forward portion extending over, and spaced from, a tread surface of an adjacent lower step, (c) disposing a separate relatively large semiconductor diode between the forward portion of each sheet and the rear portion of an adjacent sheet, (d) heating the assembly of the substrate, the metal sheets, and the diodes to melt the solder and to connect the diodes in series, and (e) cutting through portions of the sheets and diodes to form a plurality of columns of relatively smaller, serially connected diodes.

Inventors

  • 👤 Paul Nyul

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 18:21
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/40; H01S5/4025

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 60 words
An array of diodes comprising: a substrate of insulating material having one side formed with a plurality of steps, each step having a tread surface, a separate row of spaced-apart diodes disposed on each of said tread surfaces, corresponding diodes in the rows being disposed in columns, and means electrically connecting the diodes in each of said columns in series.
Claim 2
Dependent Claim 60 words
An array of diodes comprising: a substrate of insulating material having one side formed with a plurality of steps, each step having a tread surface, a separate row of spaced-apart diodes disposed on each of said tread surfaces, corresponding diodes in the rows being disposed in columns, and means electrically connecting the diodes in each of said columns in series.
Claim 3
Dependent Claim 40 words
An array as described in claim 1 wherein: said substrate comprises an insulating material chosen from the group consisting of beryllium oxide, aluminum oxide, and silicon, and means, including said electrically connecting means, fix said diodes to said tread surfaces.
Claim 4
Dependent Claim 33 words
An array as described in claim 2 wherein said fixing means comprises metal layers coated on said tread surfaces, and said metal layers connect said diodes in each of said rows in parallel.
Claim 5
Dependent Claim 33 words
An array as described in claim 2 wherein said columns of diodes are connected in parallel, and said diodes in each of said rows have PN-junctions that lie in substantially the same plane.
Claim 6
Dependent Claim 43 words
An array as described in claim 1 wherein said steps are substantially similar to each other, said diodes are fixed to said tread surfaces, and said diodes in each row are similarly oriented and have PN-junctions that lie in substantially the same plane.
Claim 7
Dependent Claim 76 words
A semiconductor diode array comprising: a substrate of insulating material having a series of steps formed therein: a plurality of conductive contacts, one disposed on each step and extending beyond its step out over the next lower step; a plurality of light-emitting semiconductor diodes, one disposed on each step and electrically connected between the contact on that step and the contact extending from the next higher step, whereby a column of serially connected diodes is provided.
Claim 8
Dependent Claim 76 words
A semiconductor diode array comprising: a substrate of insulating material having a series of steps formed therein: a plurality of conductive contacts, one disposed on each step and extending beyond its step out over the next lower step; a plurality of light-emitting semiconductor diodes, one disposed on each step and electrically connected between the contact on that step and the contact extending from the next higher step, whereby a column of serially connected diodes is provided.
Claim 9
Dependent Claim 45 words
A semiconductor diode array according to claim 6 and further including a plurality of said diodes in a row on each of said steps with corresponding diodes in said rows constituting said column of serially connected diodes, whereby a plurality of said columns are provided.

References Cited (Backward Citations)

US3290539A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-11-22 1975-05-24 1975-11-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-11-22 1979-05-24 1979-11-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-11-22 1983-05-24 1983-11-23 $7700.00 Window Closed / Lapsed

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