Patent US4412907A successfully refreshed from Google Patents.
US4412907A
Expired / Lapsed
US
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Ferromagnetic high speed sputtering apparatus
Assignee: Ulvac Inc
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Filing: 1982-07-23
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Granted: 1983-11-01
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Expires: 2002-07-23
Abstract
Abstract A ferromagnetic, high speed, sputtering apparatus is provided which comprises a vacuum chamber and a target of ferromagnetic material. The target comprises at least two segments which are positioned adjacent to one another and have a gap therebetween. This gap has at least a portion of which that does not extend in the direction of the thickness of the target. A substrate in the vacuum chamber is positioned facing one side of the target. Also, magnetic field generating means is positioned on the other side of the target so that the magnetic field therefrom leaks through the gap.
Inventors
- 👤 Akio Ito
- 👤 Kyuzo Nakamura
- 👤 Yoshifumi Ota
- 👤 Taiki Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:59
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/32; H01J37/34; H01J37/3411; H01J37/3414; H01J37/3423; H01J37/3402; H01J37/3405; H01J37/3408; H01J37/3426
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
103 words
A ferromagnetic, high speed, sputtering apparatus comprising: (a) a vacuum chamber; (b) a target means of ferromagnetic material, positioned in said vacuum chamber, said target means comprising at least two segments positioned adjacent to one another with a gap therebetween, wherein said gap has at least a portion thereof which does not extend in the direction of the thickness of said target means; (c) substrate means in said vacuum chamber positioned facing one side of said target means; and (d) magnetic field generating means positioned on the other side of said target means such that the magnetic field therefrom leaks through said gap.
Claim 2
Dependent Claim
103 words
A ferromagnetic, high speed, sputtering apparatus comprising: (a) a vacuum chamber; (b) a target means of ferromagnetic material, positioned in said vacuum chamber, said target means comprising at least two segments positioned adjacent to one another with a gap therebetween, wherein said gap has at least a portion thereof which does not extend in the direction of the thickness of said target means; (c) substrate means in said vacuum chamber positioned facing one side of said target means; and (d) magnetic field generating means positioned on the other side of said target means such that the magnetic field therefrom leaks through said gap.
Claim 3
Dependent Claim
23 words
An apparatus as set forth in claim 1 including a backing plate positioned between said target means and said magnetic field generating means.
Claim 4
Dependent Claim
20 words
An apparatus as set forth in claim 1 wherein said magnetic field generating means is at least one permanent magnet.
Claim 5
Independent Claim
31 words
An apparatus as set forth in any one of claims 1-3 wherein the entire length of said gap is inclined with respect to the direction of thickness of said target means.
Claim 6
Independent Claim
29 words
An apparatus as set forth in any one of claims 1-3 wherein a portion of said gap is inclined with respect to the direction of thickness of said target.
Claim 7
Independent Claim
27 words
An apparatus as set forth in any one of claims 1-3 wherein a portion of said gap is perpendicular to the direction of thickness of said target.
Claim 8
Independent Claim
27 words
An apparatus as set forth in any one of claims 1-3 wherein at least two of said segments have inclined side walls not parallel to each other.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |