Patent US4015249A successfully refreshed from Google Patents.
US4015249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer of domains between fields
Assignee: International Business Machines Corp
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Filing: 1975-12-15
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Granted: 1977-03-29
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Expires: 1995-12-15
Abstract
Abstract A system suitable to transfer a bubble domain from one field to a second field where the field is the largest area formed by exposing a pattern and which all of the dimensions are critical is disclosed. A magnetic domain is propagated out of the first field through an outlet into an inlet of the second field. In a preferred embodiment, the width of the outlet is one to ten bubble diameters and the width of the inlet opening is two to ten bubble diameters, the inlet opening being always at least as wide as the outlet opening. Associated with the inlet opening is a contracting means, for example, a Chevron pattern of decreasing height, which reduces the size of the domain to a size suitable for use in the bubble system in the second magnetic field.
Inventors
- 👤 Hung Liang Hu
- 👤 Laurence Lee Rosier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:06
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0875; G11C19/0883
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
88 words
The combination adapted to move a magnetic domain from an outlet in a first field to a second field comprising outlet means from a first field, propagation means in said first field adapted to move a domain in a first direction out of said field through said outlet means, inlet means to a second field positioned next to said outlet means wherein a domain leaving said outlet means enters said inlet means, and propagation means in said second field adapted to move a domain in said first direction.
Claim 2
Dependent Claim
88 words
The combination adapted to move a magnetic domain from an outlet in a first field to a second field comprising outlet means from a first field, propagation means in said first field adapted to move a domain in a first direction out of said field through said outlet means, inlet means to a second field positioned next to said outlet means wherein a domain leaving said outlet means enters said inlet means, and propagation means in said second field adapted to move a domain in said first direction.
Claim 3
Dependent Claim
19 words
The combination as described in claim 1 wherein said inlet means is at least 2 bubble diameters in width.
Claim 4
Dependent Claim
29 words
The combination as described in claim 1 wherein said inlet means is between 2 and 10 bubble diameters in width and at least as wide as said outlet means.
Claim 5
Dependent Claim
22 words
The combination as described in claim 1 wherein said inlet means is at least 1 bubble diameter wider than said outlet means.
Claim 6
Dependent Claim
19 words
The combination as described in claim 1 wherein said outlet means is 1 to 10 bubble diameters in width.
Claim 7
Dependent Claim
18 words
The combination as described in claim 1 wherein said inlet means and said outlet means are non-critically aligned.
Claim 8
Dependent Claim
122 words
The combination adapted to move a domain from an outlet in a first field to a second field comprising outlet means in a first field, propagation means in said first field adapted to move a domain in a first direction out of said field through said outlet means, inlet means to a second field positioned next to said outlet means wherein a bubble leaving said outlet means enters said inlet means, propagation means in said second field adapted to move a domain in said first direction, and contracting means in said second field associated with said inlet means and adapted to reduce the size of the domain in said inlet means to a bubble domain suitable for use in said second field.
Claim 9
Dependent Claim
122 words
The combination adapted to move a domain from an outlet in a first field to a second field comprising outlet means in a first field, propagation means in said first field adapted to move a domain in a first direction out of said field through said outlet means, inlet means to a second field positioned next to said outlet means wherein a bubble leaving said outlet means enters said inlet means, propagation means in said second field adapted to move a domain in said first direction, and contracting means in said second field associated with said inlet means and adapted to reduce the size of the domain in said inlet means to a bubble domain suitable for use in said second field.
Claim 10
Dependent Claim
14 words
The combination as described in claim 7 wherein said contracting means include chevron means.
Claim 11
Dependent Claim
19 words
The combination as described in claim 7 wherein said contracting means include a funnel-shaped structure adapted to confine domains.
Claim 12
Dependent Claim
29 words
The combination as described in claim 7 including expanding means in said first field associated with said outlet means and adapted to increase the length of the bubble domain.
Claim 13
Dependent Claim
19 words
The combination as described in claim 10 wherein said expanding means include a funnel-shaped structure adapted to confine domains.
Claim 14
Dependent Claim
113 words
A bubble system comprising a first bubble lattice in a first field having an outlet means, said outlet means being 1 to 10 bubble diameters wide, a second bubble lattice in a second field having an inlet means, said inlet means positioned next to said outlet means wherein a domain leaving said outlet means enters said inlet means, said inlet means being 2 to 10 bubble diameters wide and at least as wide as said outlet means, and contracting means in said second field associated with said inlet means and adapted to reduce the size of the domain in said inlet means to a bubble domain suitable for use in said second lattice.
Claim 15
Dependent Claim
113 words
A bubble system comprising a first bubble lattice in a first field having an outlet means, said outlet means being 1 to 10 bubble diameters wide, a second bubble lattice in a second field having an inlet means, said inlet means positioned next to said outlet means wherein a domain leaving said outlet means enters said inlet means, said inlet means being 2 to 10 bubble diameters wide and at least as wide as said outlet means, and contracting means in said second field associated with said inlet means and adapted to reduce the size of the domain in said inlet means to a bubble domain suitable for use in said second lattice.
Claim 16
Dependent Claim
114 words
A bubble system comprising a first shift register in a first field having an outlet means, said outlet means being 1 to 10 bubble diameters wide, a second shift register in a second field having an inlet means, said inlet means positioned next to said outlet means wherein a domain leaving said outlet means enters said inlet means, said inlet means being 2 to 10 bubble diameters wide and at least as wide as said outlet means, and contracting means in said second field associated with said inlet means and adapted to reduce the size of the domain in said inlet means to a bubble domain suitable for use in said second shift register.
Claim 17
Dependent Claim
114 words
A bubble system comprising a first shift register in a first field having an outlet means, said outlet means being 1 to 10 bubble diameters wide, a second shift register in a second field having an inlet means, said inlet means positioned next to said outlet means wherein a domain leaving said outlet means enters said inlet means, said inlet means being 2 to 10 bubble diameters wide and at least as wide as said outlet means, and contracting means in said second field associated with said inlet means and adapted to reduce the size of the domain in said inlet means to a bubble domain suitable for use in said second shift register.
Claim 18
Dependent Claim
114 words
A bubble system comprising a first major loop in a first field having an outlet means, said outlet means being 1 to 10 bubble diameters wide, a second major loop in a second field having an inlet means, said inlet means positioned next to said outlet means wherein a domain leaving said outlet means enters said inlet means, said inlet means being 2 to 10 bubble diameters wide and at least as wide as said outlet means, and contracting means in said second field associated with said inlet means and adapted to reduce the size of the domain in said inlet means to a bubble domain suitable for use in said second major loop.
Claim 19
Dependent Claim
114 words
A bubble system comprising a first major loop in a first field having an outlet means, said outlet means being 1 to 10 bubble diameters wide, a second major loop in a second field having an inlet means, said inlet means positioned next to said outlet means wherein a domain leaving said outlet means enters said inlet means, said inlet means being 2 to 10 bubble diameters wide and at least as wide as said outlet means, and contracting means in said second field associated with said inlet means and adapted to reduce the size of the domain in said inlet means to a bubble domain suitable for use in said second major loop.
References Cited (Backward Citations)
US3786446A
Cited
US3789373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |