US3568127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical resistors
Assignee: Sprague Electric Co
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Filing: 1968-10-28
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Granted: 1971-03-02
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Expires: 1988-10-28
Abstract
Abstract In forming a plurality of resistor components a resistive metal film is deposited on an inert, electrically nonconductive base. Parallel electrode strips are deposited on the resistive film and parallel overglaze strips are deposited on the resistive film between and slightly overlapping the electrode strips. This structure is separated into a plurality of resistor components by making a series of parallel cuts down through all the layers along lines at right angles to a line following the longitudinal axis of said glaze strips; annealing the structure to refuse the overglaze; and performing a second series of parallel cuts at right angles to said first cuts and following lines midway of said electrodes strips.
Inventors
- 👤 Bruno R Aimi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:44
CPC Classifications
H; H01; H01C; H01C17/00; H01C7/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
101 words
A resistor component comprising an inert electrically nonconductive base having a fired-on electrically resistive metal film coextensive with a broad surface thereof and in direct contact with at least a substantial portion thereof; a pair of spaced metal electrodes in electrical contact with said resistive film on the top surface thereof; a fired-on, continuous, nonconductive overglaze covering all of the active resistor between said electrodes and slightly overlapping said electrodes; an edge of said overglaze being refused and strain-relieved; and a metal film fired-on the surface of the nonconductive base which is opposite the broad surface having the resistive film thereon.
Claim 2
Dependent Claim
101 words
A resistor component comprising an inert electrically nonconductive base having a fired-on electrically resistive metal film coextensive with a broad surface thereof and in direct contact with at least a substantial portion thereof; a pair of spaced metal electrodes in electrical contact with said resistive film on the top surface thereof; a fired-on, continuous, nonconductive overglaze covering all of the active resistor between said electrodes and slightly overlapping said electrodes; an edge of said overglaze being refused and strain-relieved; and a metal film fired-on the surface of the nonconductive base which is opposite the broad surface having the resistive film thereon.
Claim 3
Dependent Claim
53 words
The resistor component of claim 1 having a fired-on, continuous, nonconductive underglaze extending over a central area of the broad surface of said base beneath all of the active portion of said resistive film, said resistive film extending beyond said underglaze and wherein said nonconductive base has greater thermal conductivity than said underglaze.
Claim 4
Dependent Claim
52 words
The resistor component of claim 2 wherein said base is alumina, said resistive film is either a platinum group metal, an alloy of one or more members of this group or an alloy of this group with gold, and wherein the overglaze has a lower fusing range than that of the underglaze.
Claim 5
Dependent Claim
110 words
A plurality of physically separated resistor components adhesively bonded to a support plate, each resistor component comprising an inert electrically nonconductive base having a fired-on electrically resistive metal film coextensive with a broad surface thereof and in direct contact with at least a substantial portion thereof; a pair of spaced metal electrodes in electrical contact with said resistive film on the nonbase-contacting surface thereof; and a fired-on, continuous, nonconductive overglaze covering all of the active resistor between said electrodes and slightly overlapping said electrodes; an edge of said overglaze being refused and strain-relieved; and said resistor components being adhesively bonded to said support plate so that the electrodes are outermost.
Claim 6
Dependent Claim
110 words
A plurality of physically separated resistor components adhesively bonded to a support plate, each resistor component comprising an inert electrically nonconductive base having a fired-on electrically resistive metal film coextensive with a broad surface thereof and in direct contact with at least a substantial portion thereof; a pair of spaced metal electrodes in electrical contact with said resistive film on the nonbase-contacting surface thereof; and a fired-on, continuous, nonconductive overglaze covering all of the active resistor between said electrodes and slightly overlapping said electrodes; an edge of said overglaze being refused and strain-relieved; and said resistor components being adhesively bonded to said support plate so that the electrodes are outermost.
Claim 7
Dependent Claim
31 words
The resistor arrangement of claim 4 wherein each component has a metal film fired-on the broad surface of the nonconductive base which is opposite to that having the resistive film thereon.
Claim 8
Dependent Claim
56 words
The resistor arrangement of claim 4 wherein each component has a fired-on, continuous, nonconductive underglaze extending over a central area of the broad surface of said base beneath all of the active portion of said resistive film, said resistive film extending beyond said underglaze and wherein said nonconductive base has greater thermal conductivity than said underglaze.
Claim 9
Dependent Claim
31 words
The resistor arrangement of claim 6 wherein each component has a metal film fired-on the broad surface of the nonconductive base which is opposite to that having the resistive film thereon.
Claim 10
Dependent Claim
22 words
The resistor of claim 1 wherein both edges of said overglaze adjacent the edges of said active resistor are refused and strain-relieved.
Claim 11
Dependent Claim
22 words
The resistor of claim 2 wherein both edges of said overglaze adjacent the edges of said active resistor are refused and strain-relieved.
Claim 12
Dependent Claim
22 words
The resistor of claim 3 wherein both edges of said overglaze adjacent the edges of said active resistor are refused and strain-relieved.
Claim 13
Dependent Claim
24 words
The resistor arrangement of claim 4 wherein both edges of said overglaze a adjacent the edges of said active resistor are refused and strain-relieved.
Claim 14
Dependent Claim
23 words
The resistor arrangement of claim 5 wherein both edges of said overglaze adjacent the edges of said active resistor are refused and strain-relieved.
Claim 15
Dependent Claim
23 words
The resistor arrangement of claim 6 wherein both edges of said overglaze adjacent the edges of said active resistor are refused and strain-relieved.
Claim 16
Dependent Claim
23 words
The resistor arrangement of claim 7 wherein both edges of said overglaze adjacent the edges of said active resistor are refused and strain-relieved.
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |