US3786445A
Expired / Lapsed
US
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Integrated magnetic bubble and semiconductor device
Assignee: International Business Machines Corp
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Filing: 1972-07-03
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Granted: 1974-01-15
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Expires: 1992-07-03
Abstract
Abstract A magnetic bubble device and its associated read, write, propagation, sensing, addressing, driving, timing and control elements are combined in a unitary magnetic sheet-semiconductor structure.
Inventors
- 👤 I Ho
- 👤 J Riseman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:27
CPC Classifications
H; H01; H01F; H01F10/00; H01F10/06; G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/085; G11C19/0866
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
164 words
A magnetic bubble memory comprising a magnetic member, means providing a magnetic bias field oriented perpendicular to the plane of said magnetic member, means providing a rotating magnetic switching field oriented in the plane of said magnetic member, a semiconductor member carrying said magnetic member and attached thereto in a laminar manner, means to form magnetic domains in said magnetic member, said domains representing data to be stored in said memory, a permalloy path located between said semiconductor member and said magnetic member for propagating said domains, sensing means formed in said semiconductor member for sensing the presence of said domains and for producing an electric signal when the presence of a domain is sensed, amplifying means for amplifying said signals to produce an amplified output signal corresponding to sensed data in said memory, a random access semiconductor memory formed in said semiconductor member and operably connected to said magnetic bubble memory, and a shield placed over the active portion of said semiconductor member.
Claim 2
Dependent Claim
164 words
A magnetic bubble memory comprising a magnetic member, means providing a magnetic bias field oriented perpendicular to the plane of said magnetic member, means providing a rotating magnetic switching field oriented in the plane of said magnetic member, a semiconductor member carrying said magnetic member and attached thereto in a laminar manner, means to form magnetic domains in said magnetic member, said domains representing data to be stored in said memory, a permalloy path located between said semiconductor member and said magnetic member for propagating said domains, sensing means formed in said semiconductor member for sensing the presence of said domains and for producing an electric signal when the presence of a domain is sensed, amplifying means for amplifying said signals to produce an amplified output signal corresponding to sensed data in said memory, a random access semiconductor memory formed in said semiconductor member and operably connected to said magnetic bubble memory, and a shield placed over the active portion of said semiconductor member.
Claim 3
Dependent Claim
14 words
The device of claim 8 wherein said means for sensing comprises a magneto-resistive device.
Claim 4
Dependent Claim
15 words
The device of claim 8 wherein said means for sensing comprises a Hall effect device.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |