US4101970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic bubble module
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1976-07-08
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Granted: 1978-07-18
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Expires: 1996-07-08
Abstract
Abstract In a magnetic bubble module comprising magnetic bubble chips disposed on substrates and driving coils surrounding the magnetic bubble chips, at least one of the substrates extends from the inside to the outside of the coils and serves as a heat transfer plate. The heat transfer plate includes at least one metal foil having a thickness smaller than a skin depth of the metal.
Inventors
- 👤 Nobuo Saito
- 👤 Shigeru Yoshizawa
- 👤 Takashi Toyooka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:32
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/085
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
A magnetic bubble module comprising at least one substrate including therein at least one metal foil having a thickness smaller than a skin depth of said metal, said substrate serving also as a heat transfer plate; at least one magnetic bubble chip arranged on said substrate; and driving coils enclosing said chip therein for generating a rotating magnetic field, wherein said substrate extends from the inside to the outside of said coils.
Claim 2
Dependent Claim
72 words
A magnetic bubble module comprising at least one substrate including therein at least one metal foil having a thickness smaller than a skin depth of said metal, said substrate serving also as a heat transfer plate; at least one magnetic bubble chip arranged on said substrate; and driving coils enclosing said chip therein for generating a rotating magnetic field, wherein said substrate extends from the inside to the outside of said coils.
Claim 3
Dependent Claim
59 words
A magnetic bubble module as claimed in claim 1, further comprising a heat sink disposed outside said driving coils, wherein a part of said substrate is thermally in contact with said heat sink outside said driving coils, an insulating film being inserted between said part of said substrate and said heat sink so that no closed circuit is formed.
Claim 4
Dependent Claim
24 words
A magnetic bubble module as claimed in claim 2, wherein said substrate has a lamination structure consisting of alternate metal and insulator thin films.
Claim 5
Dependent Claim
46 words
A magnetic bubble module as claimed in claim 1, wherein said module comprises a plurality of said substrates, a spacer having the same structure as said substrate is inserted between said substrates, and said spacer also extends from the inside to the outside of said coils.
Claim 6
Dependent Claim
24 words
A magnetic bubble module as claimed in claim 1, wherein said substrate has a lamination structure consisting of alternate metal and insulator thin films.
Claim 7
Dependent Claim
18 words
A magnetic bubble module as claimed in claim 1, wherein said substrate comprises a plate of said metal.
Claim 8
Dependent Claim
22 words
A magnetic bubble module as claimed in claim 1, wherein said substrate comprises a lamination of a plurality of said metal foils.
References Cited (Backward Citations)
US3927397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |