US Patent No: 5,955,154

Number of patents in Portfolio can not be more than 2000

Magnetic recording medium with laser textured glass or glass-ceramic substrate

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Abstract

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A magnetic recording medium is formed with a laser textured glass or glass-ceramic substrate. The use of a pulsed, focused laser light beam, such as a CO.sub.2 derived laser light beam, enables the formation of an accurately textured landing zone on a glass or glass-ceramic substrate which is substantially replicated on subsequently applied layers.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SEAGATE TECHNOLOGY LLCSCOTTS VALLEY, CA5514

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Ga-Lane Fremont, CA 591 1637
Xuan, Jialuo Jack Milpitas, CA 34 222

Cited Art Landscape

Patent Info (Count) # Cites Year
 
SEAGATE TECHNOLOGY LLC (3)
5,062,021 Selectively textured magnetic recording media 148 1990
5,714,207 Method of laser texturing glass or glass-ceramic substrates for magnetic recording media 21 1997
5,853,820 Controlled laser texturing glass-ceramic substrates for magnetic recording media 11 1997
 
CANON KABUSHIKI KAISHA (2)
4,307,408 Recording apparatus using coherent light 25 1979
5,416,755 Optical pickup using split beams impinging on different photo-detector areas 26 1994
 
HGST NETHERLANDS B.V. (2)
5,567,484 Process for texturing brittle nonmetallic surfaces 35 1995
5,595,791 Process for texturing brittle glass disks 42 1995
 
KOMAG, INC. (2)
5,166,006 Textured thin-film substrate and method 60 1991
5,741,560 Method for preparing a substrate for a magnetic disk 19 1996
 
ALLEGRO MICROSYSTEMS, INC. (1)
4,724,219 Radiation melting of semiconductor surface areas through a remote mask 32 1986
 
CORNING INCORPORATED (1)
5,273,834 Discs for memory storage devices 37 1993
 
CREDIT MANAGERS ASSOCIATION OF CALIFORNIA (1)
5,120,927 High track density media with optical servo tracks and method and apparatus for inscribing the tracks on the media 46 1990
 
ELECTRO SCIENTIFIC INDUSTRIES, INC. (1)
5,614,114 Laser system and method for plating vias 141 1994
 
HITACHI GLOBAL STORAGE TECHNOLOGIES JAPAN, LTD. (1)
5,202,810 Magnetic disk having an improved surface configuration 61 1990
 
KABUSHIKI KAISHA OHARA (1)
5,391,522 Glass-ceramic for magnetic disks and method for manufacturing the same 82 1994
 
SHARP KABUSHIKI KAISHA (1)
5,128,914 Optical pickup apparatus utilizing a diffraction device 41 1990
 
SHOWA DENKO K.K. (1)
5,582,878 Process for producing magnetic recording medium 17 1996
 
SONY CORPORATION (1)
5,402,407 Optical pickup apparatus and method for adjusting optical axis thereof 52 1993
 
The Wiggins Teape Group Limited (1)
5,352,495 Treatment of a surface by laser energy 8 1993
 
UNITED MODULE CORPORATION (1)
5,798,164 Zone textured magnetic recording media 16 1995

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V. (2)
6,117,620 Method of producing a calibration disk 6 1998
7,554,055 Method for making ohmic contact to silicon structures with low thermal loads 0 2005
 
SEAGATE TECHNOLOGY LLC (2)
6,204,474 Apparatus and method for laser texturing a landing zone and a data zone of a magnetic recording medium 3 1999
6,589,609 Crystal zone texture of glass-ceramic substrates for magnetic recording disks 4 2000
 
CORNING INCORPORATED (1)
6,350,506 Textured surface and method 3 1999
 
WD MEDIA, INC. (1)
6,395,349 Method of marking disks 1 1999
 
ZWIESEL KRISTALLGLAS AG (1)
8,122,740 Method for generating raised or recessed structures on hollow bodies, preferably comprised of glass 1 2009

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