Patent US4731297A successfully refreshed from Google Patents.
US4731297A
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Laminated components of open magnetic circuit type
Assignee: TDK Corp
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Filing: 1985-08-20
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Granted: 1988-03-15
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Expires: 2005-08-20
Abstract
Abstract Laminated components of the open magnetic circuit type including, or incorporating, inductors of the same type are manufactured by alternately superposing a plurality of green magnetic layers and a plurality of fragmentary, green conductor strips, each strip constituting about half a turn of coil in coil-forming conductor patterns, in such a manner that the ends of the conductor strips overlap the ends of adjacent strips whereas the remainders of the adjacent strips are separated by each interposing magnetic layer, the conductor strips being arranged so that they are vertically superposed along the same spiraling loci, sintering the resulting laminate to a solid sintered body, and, before or after the sintering, sectioning the laminate along the spiraling loci into individual components.
Inventors
- 👤 Minoru Takaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:17
CPC Classifications
H; H01; H01F; H01F37/00; H01F17/00; H01F17/0006; H01F17/0013; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063; Y10T428/1209; Y10T428/12104; Y10T428/12111; Y10T428/12118; Y10T428/12125
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
100 words
Laminated components of the open magnetic circuit type including, or incorporating, inductors of the same type, each of which comprises a plurality of magnetic layers and a plurality of fragmentary conductor strips formed along the outermost edges of the magnetic layers to constitute about half a turn of coil each, said conductor strips being joined between and across the magnetic layers to form altogether a spiral coil-forming conductor pattern in which the strips are vertically superposed and connected on the same spiraling loci, the outermost peripheries of the conductor pattern being exposed from between the magnetic layers to the outside.
Claim 2
Dependent Claim
100 words
Laminated components of the open magnetic circuit type including, or incorporating, inductors of the same type, each of which comprises a plurality of magnetic layers and a plurality of fragmentary conductor strips formed along the outermost edges of the magnetic layers to constitute about half a turn of coil each, said conductor strips being joined between and across the magnetic layers to form altogether a spiral coil-forming conductor pattern in which the strips are vertically superposed and connected on the same spiraling loci, the outermost peripheries of the conductor pattern being exposed from between the magnetic layers to the outside.
Claim 3
Dependent Claim
46 words
An open magnetic circuit type, laminated component comprises: a plurality of magnetic layers; a plurality of conductor strips, said strips being interconnected thereby defining a coil, said layers being interposed between said strips, each said strip being placed at an outermost edge portion of said layers.
Claim 4
Dependent Claim
46 words
An open magnetic circuit type, laminated component comprises: a plurality of magnetic layers; a plurality of conductor strips, said strips being interconnected thereby defining a coil, said layers being interposed between said strips, each said strip being placed at an outermost edge portion of said layers.
Claim 5
Dependent Claim
13 words
The laminated component according to claim 2 wherein said component being an inductor.
Claim 6
Dependent Claim
19 words
The laminated component according to claim 2 wherein each said strip defines about half a turn of said coil.
Claim 7
Dependent Claim
29 words
The laminated component according to claim 2 wherein an outermost periphery of said coil formed by said plurality of strips being exposed from between said plurality of magnetic layers.
Claim 8
Dependent Claim
30 words
The laminated component according to claim 2 wherein said plurality of conductor strips comprise a metal powder paste selected from the group consisting of silver, aluminum, copper, silver-palladium, and palladium.
Claim 9
Dependent Claim
18 words
The laminated component according to claim 2 wherein said plurality of magnetic layers comprise a ferrite powder paste.
Claim 10
Dependent Claim
22 words
The laminated component according to claim 2 comprising external terminals being connected to said conductor strips and formed of a conductive paste.
Claim 11
Dependent Claim
14 words
The laminated component according to claim 2 wherein said component being a sintered body.
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) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |