US4771260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wire bonded microfuse and method of making
Assignee: Cooper Technologies Co
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Filing: 1987-03-24
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Granted: 1988-09-13
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Expires: 2007-03-24
Abstract
Abstract A microfuse (10) with a ceramic chip (12), thick film pads (14), fusible wire (16), attached to pads (14) without solder or flux, ceramic coating (18) and plastic body (20). External lead (24) configuration can be axial, radial or surface mount. The method of manufacturing the fuse (10) is improved by utilizing a wire bonding technique in order to improve the quality of the manufacturing process and increase the reliability in performance of the fuse and reduce manufacturing cost.
Inventors
- 👤 Leon Gurevich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:55
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/041; H01H85/0411; H01H69/00; H01H69/02; H01H85/20; H01H85/201; H01H2069/025; H01H2069/027; H01H85/0013; H01H85/0021; H01H2085/0034; H01H2085/0412; H01H2085/0414; H01H85/003; H01H85/0415; H01H85/0417
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
63 words
A fuse element subassembly comprising: an insulating ceramic substrate; metallized areas on both ends of said substrate; a fusible element attached to said metallized areas in a manner not employing solder or flux; and wherein an arc quenching material covers at least a portion of said substrate, metallized areas, and all of the fusible element; and wherein said arc quenching material is ceramic.
Claim 2
Dependent Claim
63 words
A fuse element subassembly comprising: an insulating ceramic substrate; metallized areas on both ends of said substrate; a fusible element attached to said metallized areas in a manner not employing solder or flux; and wherein an arc quenching material covers at least a portion of said substrate, metallized areas, and all of the fusible element; and wherein said arc quenching material is ceramic.
Claim 3
Dependent Claim
23 words
A fuse element subassembly as in claim 1 wherein said insulating substrate is selected from a group comprising ceramic, glass, alumina, or forsterite.
Claim 4
Dependent Claim
34 words
A fuse element subassembly as in claim 1 wherein said metallized areas are made with a metal selected from a group of metals comprised of copper, silver, nickel, palladium, gold, platinum and combinations thereof.
Claim 5
Dependent Claim
15 words
A fuse element subassembly as in claim 1 wherein said fusible element is a wire.
Claim 6
Dependent Claim
16 words
A fuse element subassembly as in claim 1 wherein said fusible element is a metal ribbon.
Claim 7
Dependent Claim
24 words
A fuse element subassembly as in claim 1 wherein said fusible element is selected from a group comprised of aluminum, gold, silver or copper.
Claim 8
Dependent Claim
48 words
A fuse comprising; an insulating substrate; metallized areas on both ends of said substrate; a fusible element attached to said metallized areas in a manner not employing solder or flux; and one lead attached to each of said metallized areas in a manner not employing solder or flux.
Claim 9
Dependent Claim
48 words
A fuse comprising; an insulating substrate; metallized areas on both ends of said substrate; a fusible element attached to said metallized areas in a manner not employing solder or flux; and one lead attached to each of said metallized areas in a manner not employing solder or flux.
Claim 10
Dependent Claim
19 words
A fuse as in claim 7 wherein said lead is flattened on the end attached to said metallized areas.
Claim 11
Dependent Claim
26 words
A fuse as in claim 7 wherein an arc quenching material covers at least a portion of said substrate, metallized areas, fusible element and lead ends.
Claim 12
Dependent Claim
13 words
A fuse as in claim 9 wherein said arc quenching material is ceramic.
Claim 13
Dependent Claim
15 words
A fuse as in claim 9 wherein an insulating means covers said arc quenching material.
Claim 14
Dependent Claim
12 words
A fuse as in claim 11 wherein said insulating means is plastic.
Claim 15
Dependent Claim
23 words
A fuse element subassembly as in claim 1 wherein a second fuse element subassembly is connected in series with said fuse element subassembly.
Claim 16
Dependent Claim
23 words
A fuse element subassembly as in claim 1 wherein a second fuse element subassembly is connected in parallel with said fuse element subassembly.
Claim 17
Dependent Claim
17 words
A fuse as in claim 7 wherein a second fuse is connected in series with said fuse.
Claim 18
Dependent Claim
17 words
A fuse as in claim 7 wherein a second fuse is connected in parallel with said fuse.
Claim 19
Dependent Claim
22 words
A fuse as in claim 11 wherein the end of said lead is offset to center said fuse in said insulating means.
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) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |