US Patent No: 7,100,266

Number of patents in Portfolio can not be more than 2000

Method of forming a beveled writing pole of a perpendicular writing element

ALSO PUBLISHED AS: 20020170165
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Importance

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Abstract

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A beveled writing pole includes a top portion, a beveled portion, and a throat portion. The top portion has an end that defines a writing pole tip. The beveled portion adjoins the top portion and has a bevel that extends from the writing pole tip and increases a thickness of the writing pole proximate the pole tip. The throat portion is formed of the top and beveled portions and has tapered sides that extend from the writing pole tip and increase a width of the writing pole proximate the writing pole tip. A method of forming the beveled writing pole is also presented.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
SEAGATE TECHNOLOGY LLCSCOTTS VALLEY, CA5638

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Amin, Nurul Woodbury, MN 113 625
Kong, Vee S Minneapolis, MN 7 52
Michel, Richard P Minneapolis, MN 8 63
Plumer, Martin L Bloomington, MN 14 85
van, Ek Johannes Minnetonka, MN 19 141

Cited Art Landscape

Patent Info (Count) # Cites Year
 
KABUSHIKI KAISHA TOSHIBA (3)
5,680,283 Magnetic head and magnetic disk drive 18 1995
5,854,727 Magnetic head and magnetic disk drive 16 1997
5,995,341 Magnetic disk drive recording a signal with a skew angle 44 1998
 
SEAGATE TECHNOLOGY LLC (3)
4,839,761 Magnetic head for perpendicular magnetic recording system 16 1987
4,982,301 Magnetic head for perpendicular magnetic recording system and process 17 1990
6,504,675 Perpendicular magnetic recording heads with write pole shaped to reduce skew effects during writing 144 2001
 
HITACHI GLOBAL STORAGE TECHNOLOGIES JAPAN, LTD. (2)
4,550,353 Thin-film magnetic head and method for fabricating the same 43 1983
6,710,973 Single pole type recording head including tapered edges 55 2001
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (2)
4,190,872 Thin film inductive transducer 71 1978
4,390,916 Single track magnetic head assembly 6 1980
 
ALPS ELECTRIC CO., LTD. (1)
4,811,142 Magnetic head for vertical magnetic recording and method of producing same 7 1987
 
BULL S.A. (1)
4,771,350 Magnetic reading/writing transducer for perpendicular recording 24 1985
 
COMMISSARIAT A L'ENERGIE ATOMIQUE (1)
5,196,976 Magnetoresistance magnetic head for perpendicular recording on a magnetic support 53 1990
 
FUJITSU LIMITED (1)
4,974,110 Thin film magnetic head for perpendicular recording and reproducing 38 1989
 
HEWLETT-PACKARD COMPANY (1)
5,073,836 Single pole write and a differential magneto-resistive read for perpendicular recording 52 1989
 
HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V. (1)
6,510,022 Method for shaping pole pieces of magnetic heads by chemical mechanical polishing 9 2000
 
MAXTOR CORPORATION (1)
4,912,584 Method for fabricating magnetic recording poles 47 1988
 
MKE-QUANTUM COMPONENTS COLORADO LCC (1)
5,075,956 Method of making recording heads with side shields 91 1990
 
OLYMPUS OPTICAL CO., LTD. (1)
4,764,833 Perpendicular magnetic head 5 1985
 
SUMITOMO METAL INDUSTRIES, LTD. (1)
5,225,953 Magnetic thin film head of a single magnetic pole for perpendicular recording and reproduction 37 1992
 
WESTERN DIGITAL (FREMONT), INC. (1)
5,726,841 Thin film magnetic head with trimmed pole tips etched by focused ion beam for undershoot reduction 69 1996

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
WESTERN DIGITAL (FREMONT), LLC (8)
8,320,076 Method and system for providing a magnetic recording transducer including an assist pole having surfaces angled with respect to the ABS 6 2008
8,196,285 Method and system for providing a pole for a perpendicular magnetic recording head using a multi-layer hard mask 11 2008
8,254,060 Straight top main pole for PMR bevel writer 8 2009
8,225,488 Method for providing a perpendicular magnetic recording (PMR) pole 8 2009
8,458,892 Method for providing a perpendicular magnetic recording transducer using a low energy mill 3 2010
8,705,205 Magnetic recording head having a dual sidewall angle 3 2011
8,844,120 Method for providing a magnetic recording transducer including an assist pole having surfaces angled with respect to the ABS 0 2012
8,861,133 Method and system for providing a perpendicular magnetic recording transducer using a low energy mill 0 2013
 
HGST NETHERLANDS B.V. (5)
8,047,894 Apparatus for evaluating the quality of a lapping plate 0 2005
7,914,362 Method of evaluating the quality of a lapping plate 0 2005
8,139,320 Write head having independent side shield and trailing shield throat height 6 2007
8,233,234 Stepped main pole for perpendicular write heads in hard disk drives and method of making same 3 2008
8,347,489 Method for manufacturing a perpendicular magnetic write head having a leading edge tapered write pole, self aligned side shield and independent trailing shield 1 2010
 
HEADWAY TECHNOLOGIES, INC. (4)
7,322,095 Process of manufacturing a four-sided shield structure for a perpendicular write head 41 2004
7,916,425 Magnetic head having angled pole portions 6 2007
7,777,987 Perpendicular write head with tapered main pole 7 2009
7,777,988 Perpendicular write head with tapered main pole 7 2009
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (3)
8,351,152 Magnetic writer structures formed using post-deposition tilting 0 2009
8,240,024 Methods for fabricating magnetic transducers using post-deposition tilting 1 2009
8,416,537 Recording head with tilted orientation 0 2009
 
MAXTOR CORPORATION (2)
7,324,304 Tapered write pole for reduced skew effect 25 2004
7,430,095 Tapered write pole for reduced skew effect 20 2007
 
SEAGATE TECHNOLOGY LLC (2)
8,310,782 Dedicated ID-OD writer with beveled pole tips and method of manufacture 3 2008
8,405,931 Magnetic main write pole 0 2009
 
HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V. (1)
7,483,243 Magnetic head with recessed portion, and magnetic recording and reproduction apparatus comprising the same 0 2005
 
TDK CORPORATION (1)
7,545,603 Magnetic head and manufacturing method thereof 1 2005
 
WISSELINK'S TEXTIELFABRIEKEN N.V., A CORP. OF THE NETHERLANDS (1)
4,667,705 Weft change system with a weaving machine 2 1986
 
Other [Check patent profile for assignment information] (1)
8,893,376 Method of forming a straight top main pole for PMR bevel writer 0 2012

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