US Patent No: 5,431,592

Number of patents in Portfolio can not be more than 2000

Method and apparatus for burnishing magnetic disks

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Importance

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Abstract

While a magnetic disk is being rotated, compressed air is jetted to corresponding positions on the two surfaces of the magnetic disk. An abrasive tape, which has tension in its longitudinal direction, is interposed between at least either one of the two surfaces of the magnetic disk and the compressed air jetted thereto such that the compressed air may now be jetted to the abrasive tape. The air pressure of the compressed air, which is jetted to the abrasive tape, and the tension on the abrasive tape are adjusted such that the abrasive tape may be formed into a bent shape having a level of rigidity appropriate for pushing the magnetic disk. The bent shape portion of the abrasive tape is brought into sliding contact with the magnetic surface of the magnetic disk, and the region of the sliding contact of the magnetic surface of the magnetic disk with the abrasive tape is thereby uniformly burnished.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
FUJIFILM CORPORATIONTOKYO17227
FUJI PHOTO FILM CO., LTD.KANAGAWA15085

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nakata, Tomohiro Osaka, JP 26 48

Cited Art

Patent Info (Count) # Cites Year
 
FUJI PHOTO FILM CO., LTD. (1)
4,656,790 Burnishing method and apparatus for magnetic disk 28 1985
 
HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V. (1)
5,018,311 Magnetic disk burnishing method and apparatus 13 1989
 
KLA-TENCOR CORPORATION (1)
6,462,817 Method of monitoring ion implants by examination of an overlying masking material 48 2000

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
SEAGATE TECHNOLOGY LLC (5)
6,230,380 Slider for burnishing a disc 17 1998
6,322,431 Burnish head with ion milled aerodynamic pads configured in an elliptical pattern 27 1999
6,503,132 Hybrid burnish/glide head with advanced air bearing fly height control rails 12 2001
7,194,802 Tool for certifying a head-gimbal assembly 4 2002
7,690,100 Techniques for certifying a head-gimbal assembly 1 2007
 
APPLIED MATERIALS, INC. (2)
5,800,248 Control of chemical-mechanical polishing rate across a substrate surface 96 1996
5,762,536 Sensors for a linear polisher 113 1997
 
SONY CORPORATION (2)
5,669,804 Magnetic tape surface treatment method and apparatus 5 1995
6,592,435 Method of and apparatus for manufacturing recording medium 3 2001
 
APPLETON COATED, LLC (1)
6,243,934 Paper polishing belt and method of polishing paper 1 1995
 
ERNST THIELENHAUS KG (1)
5,730,647 Apparatus for fine-grinding a crankshaft 6 1997
 
FUJI PHOTO FILM CO., LTD. (1)
5,695,386 Cleaning method using abrasive tape 7 1996
 
KABUSHIKI KAISHA TOSHIBA (1)
7,367,873 Substrate processing apparatus 8 2003
 
MINNESOTA MINING AND MANUFACTURING COMPANY (1)
5,645,471 Method of texturing a substrate using an abrasive article having multiple abrasive natures 56 1995
 
WD MEDIA, INC. (1)
6,283,838 Burnishing tape handling apparatus and method 6 1999