US5019746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefabricated wire leadframe for optoelectronic devices
Assignee: Avago Technologies International Sales Pte Ltd
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Filing: 1989-12-04
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Granted: 1991-05-28
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Expires: 2009-12-04
Abstract
Abstract A light-emitting diode lamp comprises a cathode wire having a cup lined with a metal foil formed in its head end, an anode wire parallel to the cathode wire and having a flattened head end lined with a metal foil, a light-emitting diode seated in the cup and connected to the anode with a thin connecting wire, the entire assembly being potted in a transparent material. A leadframe for assembly of LED lamps comprises a pair of elongated strips and a plurality of wire pairs attached to the strips, each wire pair having an anode wire having a layer of metal foil welded to its head end and a cathode wire having a metal foil-lined cup in its head end. A method for preparing wires for leadframe assembly is also described.
Inventors
- 👤 Heinz R. Merg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:16
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/85; H10H20/857
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
121 words
A light-emitting diode lamp comprising: a cathode wire having a head end and a tail end, the head end having a layer of metal foil welded thereto and having a cup shaped depression for holding a light-emitting diode formed therein, an anode wire being parallel to the cathode wire and having a head end of the anode wire and a tail end, the head end being flattened and having a layer of metal foil welded thereto; a light-emitting diode seated in the cup shaped depression of the cathode wire; a connecting wire bonded to the diode and the anode wire; and a transparent potting material encasing the head ends of the anode and cathode wires, the diode, and the connecting wire.
Claim 2
Dependent Claim
121 words
A light-emitting diode lamp comprising: a cathode wire having a head end and a tail end, the head end having a layer of metal foil welded thereto and having a cup shaped depression for holding a light-emitting diode formed therein, an anode wire being parallel to the cathode wire and having a head end of the anode wire and a tail end, the head end being flattened and having a layer of metal foil welded thereto; a light-emitting diode seated in the cup shaped depression of the cathode wire; a connecting wire bonded to the diode and the anode wire; and a transparent potting material encasing the head ends of the anode and cathode wires, the diode, and the connecting wire.
Claim 3
Dependent Claim
43 words
A light-emitting diode lamp as recited in claim 1, wherein the metal foil comprises a laminated foil having one face composed of a metal suitable for welding to a wire lead and an opposite face composed of a metal suitable for wire bonding.
Claim 4
Dependent Claim
24 words
A light-emitting diode lamp as recited in claim 2, wherein the metal suitable for welding is selected from the group consisting of iron-group metals.
Claim 5
Dependent Claim
28 words
A light-emitting diode lamp as recited in claim 2, wherein the metal suitable for bonding is selected from the group consisting of gold, silver, platinum, palladium, and aluminum.
Claim 6
Dependent Claim
32 words
A light-emitting diode lamp as recited in claim 2, wherein the laminated foil comprises a nickel face welded to the wire lead and an opposite silver face bonded to the connecting wire.
Claim 7
Dependent Claim
21 words
A light-emitting diode lamp as recited in claim 1, wherein the metal foil is not less than about 12 micrometers thick.
Claim 8
Dependent Claim
29 words
A light-emitting diode lamp as recited in claim 1, wherein the metal foil is deformed with the head end of the cathode wire and lines the cup shaped depression.
Claim 9
Dependent Claim
23 words
A light-emitting diode lamp as recited in claim 1 further comprising an annular flange formed on the anode wire near its head end.
Claim 10
Dependent Claim
32 words
A light-emitting diode lamp as recited in claim 1, further comprising a kink in the cathode wire near its head end for centering the cup in shaped depression in the potting material.
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) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |