WO1998048409B1 - Electro-magnetic coil assembly - Google Patents
Electro-magnetic coil assemblyInfo
- Publication number
- WO1998048409B1 WO1998048409B1 PCT/US1998/007370 US9807370W WO9848409B1 WO 1998048409 B1 WO1998048409 B1 WO 1998048409B1 US 9807370 W US9807370 W US 9807370W WO 9848409 B1 WO9848409 B1 WO 9848409B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coil
- assembly
- substrate
- optical
- optical assembly
- Prior art date
Links
- 230000003287 optical Effects 0.000 claims abstract 21
- 239000000758 substrate Substances 0.000 claims abstract 17
- 238000000034 method Methods 0.000 claims abstract 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N AI2O3 Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive Effects 0.000 abstract 1
Abstract
A coil assembly (44) for use in an optical or a magneto-optical data storage system having a slider (37) and an optical assembly (40), includes a dielectric substrate (52). The coil (50) is either bonded to, or formed on the dielectric substrate, and terminates in two bonding pads. In one embodiment the dielectric substrate is flexible and is made of alumina. The coil is surface mounted on the underside of an optical assembly and/or a slider by means of available techniques, such as an adhesive. The coil assembly includes two tooling, alignment and handling holes, and an optical passage (100) defined at the center of the coil for allowing an optical beam to pass through. The coil assembly has compact, low mass, and high vertical magnetic field characteristics, and allows direct overwrite at a low flying height, with precise control of the focal plane of the optical assembly.
Claims
AMENDED CLAIMS
[received by the International Bureau on 29 October 1998 (29.10.98); new claims 21-30 added; original claims unchanged (2 pages)]
20. A method of securing a coil assembly to an optical assembly, comprising: forming a coil on a substrate by means of a wafer processing technique; and mounting said coil on the optical assembly.
21. A coil assembly for use with a support element having an underside, the coil assembly comprising: a substrate; a coil formed by means of wafer processing technique on said substrate; said coil being surface mounted at least in part, on the optical assembly; and said coil being sandwiched at least in part between said substrate and the support element.
22. A coil assembly for use with a support element having an underside and an optical assembly, the coil assembly comprising: a substrate; a coil formed by means of wafer processing technique on said substrate; and said coil being sandwiched at least in part between said substrate and the support element underside, or between said substrate and the optical assembly.
23. A coil assembly according to any of claims 21 or 22, wherein said coil includes a magnetic yoke; and wherein said magnetic yoke is surface mounted on the optical assembly.
24. A coil assembly according to any of claims 21 to 23, wherein said substrate is surface mounted on the optical assembly.
25. A coil assembly according to any of claims 21 to 24, wherein said substrate includes a substantially rigid dielectric film and a tab.
26. A method of securing a coil assembly to an optical or a magneto-optical data storage system including a support element having an underside, and an optical assembly, the method comprising: forming a coil on a substrate by means of a wafer processing technique; and
mounting said coil at least in part on any of the underside of the support element or the optical assembly by sandwiching said coil at least in part between said substrate and the support element underside, or between said substrate and the optical assembly.
27. A method according to claim 26, wherein mounting said coil includes surface mounting said coil in part on the support member underside and in part on the optical assembly.
28. A method according to claim 26, wherein said coil includes a magnetic yoke; and wherein mounting said coil includes surface mounting said magnetic yoke on any of the support element underside or the optical assembly.
29. A method according to claim 26, wherein said coil includes a magnetic yoke; and wherein mounting said coil includes surface mounting said magnetic yoke in part on the support member underside and in part on the optical assembly.
30. A method according to any of claims 26 to 29, further including the step of surface mounting said substrate on any of the support element underside or the optical assembly.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US84400397A | 1997-04-18 | 1997-04-18 | |
| US08/844,003 | 1997-04-18 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| WO1998048409A2 WO1998048409A2 (en) | 1998-10-29 |
| WO1998048409A3 WO1998048409A3 (en) | 1998-12-17 |
| WO1998048409B1 true WO1998048409B1 (en) | 1999-01-21 |
Family
ID=25291526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1998/007370 WO1998048409A2 (en) | 1997-04-18 | 1998-04-09 | Electro-magnetic coil assembly |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO1998048409A2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6922376B1 (en) * | 1997-10-17 | 2005-07-26 | Sony Corportion | Sil magneto-optic transducer having thin film magnetic coil and holded magnetic core |
| JP2001236670A (en) * | 2000-02-18 | 2001-08-31 | Sony Corp | Slider for optical head, manufacturing method thereof, and recording/reproducing device |
| US7289421B2 (en) | 2002-10-30 | 2007-10-30 | Lg Electronics Inc. | Optical pickup head of optical recording reproducing apparatus, fabrication method thereof, lubricant-coated optical pickup head of optical recording reproducing apparatus and lubricant coating method thereof |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0633525Y2 (en) * | 1987-04-10 | 1994-08-31 | 富士通株式会社 | Magnetic field application mechanism of magneto-optical disk device |
| US5105408A (en) * | 1988-05-12 | 1992-04-14 | Digital Equipment Corporation | Optical head with flying lens |
| US5022018A (en) * | 1989-02-16 | 1991-06-04 | Minnesota Mining And Manufacturing Company | System for applying a perpendicular magnetic field to the illuminated side of a magneto-optic medium |
| US5124961A (en) * | 1989-12-28 | 1992-06-23 | Fuji Xerox Co., Ltd. | Floating head for use with a recording apparatus of magneto-optical memory device |
| US5072324A (en) * | 1990-01-11 | 1991-12-10 | Magnex Corporation | Thin film transducer/transformer assembly |
| US5617378A (en) * | 1990-01-31 | 1997-04-01 | Sony Corporation | Magneto-optical disc system having an objective lens with a numerical aperture related to the thickness of the protective layer |
| JPH03260936A (en) * | 1990-03-09 | 1991-11-20 | Fujitsu Ltd | Magneto-optical disk device for magnetic field modulated overwrite |
| JPH0520723A (en) * | 1991-07-09 | 1993-01-29 | Fuji Xerox Co Ltd | Floating head of magneto-optical recording type recorder |
| JPH06301914A (en) * | 1993-04-14 | 1994-10-28 | Canon Inc | Winding method of magnetic head coil and magnetic head |
| FR2705488B1 (en) * | 1993-05-14 | 1995-06-23 | Commissariat Energie Atomique | Magnetic writing head for magneto-optical recording. |
| JPH0863824A (en) * | 1994-06-14 | 1996-03-08 | Canon Inc | Magnetic head for magnetooptical recording, manufacture thereof, and magnetooptical recorder |
-
1998
- 1998-04-09 WO PCT/US1998/007370 patent/WO1998048409A2/en active Search and Examination
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