US5140549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inductively sensed magnetic memory
Assignee: Honeywell Inc
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Filing: 1991-06-17
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Granted: 1992-08-18
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Expires: 2011-06-17
Abstract
Abstract A magnetic thin-film memory in a monolithic integrated circuit using inductive sensing of the memory states occurring therein.
Inventors
- 👤 Richard B. Fryer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:38
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/14; G11C11/155
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
230 words
A thin-film magnetic memory formed on a substrate in a monolithic integrated circuit, said memory comprising: an elongated first outward loop first conductor supported by said substrate; a first plurality of anisotropic magnetic thin-film first memory layer portions each provided at a corresponding selected location along said first outward loop first conductor at a side thereof opposite that of said substrate; an elongated first orthogonal loop conductor provided so as to cross said first outward loop first conductor at least at two of said first memory layer portions in said first plurality thereof on a side thereof opposite that of said first outward loop first conductor; a first plurality of anisotropic magnetic thin-film second memory layer portions each provided across said first orthogonal loop conductor from a corresponding one of said first plurality of first memory layer portions but with each extending around and past said first orthogonal loop conductor to be in direct contact with its corresponding one of said first plurality of said first memory layer portions; and an elongated first outward loop second conductor provided substantially parallel to said first outward loop first conductor and across therefrom with said first plurality of first memory layer portions, said first orthogonal loop conductor, and said first plurality of second memory layer portions therebetween, said first outward loop second conductor being electrically connected to said first outward loop first conductor
Claim 2
Dependent Claim
230 words
A thin-film magnetic memory formed on a substrate in a monolithic integrated circuit, said memory comprising: an elongated first outward loop first conductor supported by said substrate; a first plurality of anisotropic magnetic thin-film first memory layer portions each provided at a corresponding selected location along said first outward loop first conductor at a side thereof opposite that of said substrate; an elongated first orthogonal loop conductor provided so as to cross said first outward loop first conductor at least at two of said first memory layer portions in said first plurality thereof on a side thereof opposite that of said first outward loop first conductor; a first plurality of anisotropic magnetic thin-film second memory layer portions each provided across said first orthogonal loop conductor from a corresponding one of said first plurality of first memory layer portions but with each extending around and past said first orthogonal loop conductor to be in direct contact with its corresponding one of said first plurality of said first memory layer portions; and an elongated first outward loop second conductor provided substantially parallel to said first outward loop first conductor and across therefrom with said first plurality of first memory layer portions, said first orthogonal loop conductor, and said first plurality of second memory layer portions therebetween, said first outward loop second conductor being electrically connected to said first outward loop first conductor
Claim 3
Dependent Claim
63 words
The apparatus of claim 1 wherein a first plurality of magnetic thin-film keeper layer portions is provided, supported by said substrate, located between said substrate and said first outward loop first conductor with said first plurality of first memory layer portions each being across said first outward loop first conductor from a corresponding one of said first plurality of first keeper layer portions
Claim 4
Dependent Claim
37 words
The apparatus of claim 1 wherein a plurality of magnetic thin-film keeper layer portions is provided each across said first outward loop second conductor from a corresponding one of said first plurality of second memory layer portions
Claim 5
Dependent Claim
43 words
The apparatus of claim 1 wherein separation layers are provided between said first outward loop first conductor and said first plurality of first memory layer portions, and between said first plurality of second memory layer portions and said first outward loop second conductor.
Claim 6
Dependent Claim
43 words
The apparatus of claim 1 wherein further separation layers are also provided between said first plurality of first memory layer portions and said first orthogonal loop conductor, and between said first orthogonal loop conductor and said first plurality of second memory layer portions.
Claim 7
Dependent Claim
187 words
The apparatus of claim 1 further comprising: a second plurality of anisotropic magnetic thin-film first memory layer portions each provided at a corresponding selected location along said first outward loop first conductor at a side thereof opposite that of said substrate; an elongated second orthogonal loop conductor provided so as to cross said first outward loop first conductor at least at two of said first memory layer portions in said second plurality thereof on a side thereof opposite that of said first outward loop first conductor; and a second plurality of anisotropic magnetic thin-film second memory layer portions each provided across said first orthogonal loop conductor from a corresponding one of said second plurality of first memory layer portions but with each extending around and past said second orthogonal loop conductor to be in direct contact with its corresponding one of said second plurality of said first memory layer portions, said second plurality of first memory layer portions, said second orthogonal loop conductor, and said second plurality of second memory layer portions being located between said first outward loop first conductor and first outward loop second conductor.
Claim 8
Dependent Claim
215 words
The apparatus of claim 1 further comprising: an elongated second outward loop first conductor supported by said substrate; a second plurality of anisotropic magnetic thin-film first memory layer portions each provided at a corresponding selected location along said second outward loop first conductor at a side thereof opposite that of said substrate, said first orthogonal loop conductor crossing said second outward loop first conductor at least at two of said first memory layer portions in said second plurality thereof on a side thereof opposite that of said second outward loop first conductor; a second plurality of anisotropic magnetic thin-film second memory layer portions each provided across said first orthogonal loop conductor from a corresponding one of said second plurality of first memory layer portions but with each extending around and past said first orthogonal loop conductor to be in direct contact with its corresponding one of said second plurality of said first memory layer portions; and an elongated second outward loop second conductor provided substantially parallel to said second outward loop first conductor and across therefrom with said second plurality of first memory layer portions, said orthogonal loop conductor, and said second plurality of second memory layer portions therebetween, said second outward loop second conductor being electrically connected to said second outward loop first conductor.
References Cited (Backward Citations)
US3708789A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-18 | 1996-02-17 | 1996-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-18 | 2000-02-17 | 2000-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-18 | 2004-02-17 | 2004-08-18 | $7700.00 | Window Closed / Lapsed |