US3845444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Galvano-magnetro effect device
Assignee: Denki Onkyo Co Ltd
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Filing: 1973-06-11
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Granted: 1974-10-29
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Expires: 1993-06-11
Abstract
Abstract A galvano-magneto effect device in which a galvano-magnetro effect element is fixed on a thin substrate and a thick cover plate made of ferrite is provided on said galvano-magneto effect element.
Inventors
- 👤 N Masuda
- 👤 Y Nishino
- 👤 H Takiguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:25
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/06; G01R33/07
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
144 words
A galvano-magneto effect device comprising a. a galvano-magneto effect element comprising a thin semiconductor layer made of a magnetism sensing semi-conductor material, b. a substrate, said semiconductor layer being positioned thereon wherein the relationship of the thickness of said semiconductor layer and the substrate is such that the thickness of the semiconductor layer is greater than the range of the thickness error of the substrate when the thickness of the semiconductor layer is controlled by controlling the total thickness of the semiconductor layer and the substrate; and c. a cover plate made of ferrite which is bonded to said galvano-magneto effect element so that said cover plate covers said galvano-magneto effect element and has a thickness such that the magnetic permeability is saturated in accordance with variation of the thickness, wherein said galvano-magneto effect element is interpositioned between said substrate and said cover plate.
Claim 2
Dependent Claim
144 words
A galvano-magneto effect device comprising a. a galvano-magneto effect element comprising a thin semiconductor layer made of a magnetism sensing semi-conductor material, b. a substrate, said semiconductor layer being positioned thereon wherein the relationship of the thickness of said semiconductor layer and the substrate is such that the thickness of the semiconductor layer is greater than the range of the thickness error of the substrate when the thickness of the semiconductor layer is controlled by controlling the total thickness of the semiconductor layer and the substrate; and c. a cover plate made of ferrite which is bonded to said galvano-magneto effect element so that said cover plate covers said galvano-magneto effect element and has a thickness such that the magnetic permeability is saturated in accordance with variation of the thickness, wherein said galvano-magneto effect element is interpositioned between said substrate and said cover plate.
Claim 3
Dependent Claim
66 words
A galvano-magneto effect device in accordance with claim 1, wherein said galvano-magneto effect element is provided with a plurality of electrodes to which flat connecting parts of conductive lead frames are coupled and said cover plate is bonded to said galvano-magneto effect element so that said electrodes and connecting parts of said lead frames are sandwiched as being overlapped between said cover plate and said substrate.
Claim 4
Dependent Claim
22 words
A galvano-magneto effect device in accordance with claim 2, wherein said galvano-magneto effect element is a magneto-resistance effect element having two electrodes.
Claim 5
Dependent Claim
22 words
A galvano-magneto effect device in accordance with claim 2, wherein said galvano-magneto effect element is a Hall effect element having four electrodes.
Claim 6
Dependent Claim
33 words
A galvano-magneto effect device in accordance with claim 1, wherein the semiconductor layer of said galvano-magneto effect element has a thickness which is in the range from 5 Mu to 20 Mu .
Claim 7
Dependent Claim
27 words
A galvano-magneto effect device in accordance with claim 5, wherein said substrate has a thickness which is in the range from 60 Mu to 300 Mu .
Claim 8
Dependent Claim
22 words
A galvano-magneto device in accordance with claim 1, wherein said cover plate has a thickness which is not less than 1 mm.
Claim 9
Dependent Claim
16 words
A galvano-magneto effect device in accordance with claim 1, wherein said substrate is made of ferrite.
Claim 10
Dependent Claim
16 words
A galvano-magneto effect device in accordance with claim 1, wherein said substrate is made of glass.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |