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1. WO1997023867 - HARD DISK DRIVE HAVING RING HEAD SLIDING ON PERPENDICULAR MEDIA

Publication Number WO/1997/023867
Publication Date 03.07.1997
International Application No. PCT/US1996/020889
International Filing Date 20.12.1996
IPC
G11B 5/127 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
127Structure or manufacture of heads, e.g. inductive
G11B 5/31 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
127Structure or manufacture of heads, e.g. inductive
31using thin film
G11B 5/39 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
127Structure or manufacture of heads, e.g. inductive
33Structure or manufacture of flux-sensitive heads
39using magneto-resistive devices
G11B 5/40 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
40Protective measures on heads, e.g. against excessive temperature
G11B 5/60 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
48Disposition or mounting of heads relative to record carriers
58with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
60Fluid-dynamic spacing of heads from record carriers
G11B 21/02 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
21Head arrangements not specific to the method of recording or reproducing
02Driving or moving of heads
CPC
G11B 5/1278
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
127Structure or manufacture of heads, e.g. inductive
1278specially adapted for magnetisations perpendicular to the surface of the record carrier
G11B 5/3106
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
127Structure or manufacture of heads, e.g. inductive
31using thin films
3103Structure or manufacture of integrated heads or heads mechanically assembled and electrically connected to a support or housing
3106where the integrated or assembled structure comprises means for conditioning against physical detrimental influence, e.g. wear, contamination
G11B 5/3176
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
127Structure or manufacture of heads, e.g. inductive
31using thin films
3176Structure of heads comprising at least in the transducing gap regions two magnetic thin films disposed respectively at both sides of the gaps
G11B 5/3183
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
127Structure or manufacture of heads, e.g. inductive
31using thin films
3176Structure of heads comprising at least in the transducing gap regions two magnetic thin films disposed respectively at both sides of the gaps
3179the films being mainly disposed in parallel planes
3183intersecting the gap plane, e.g. "horizontal head structure"
G11B 5/3967
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
127Structure or manufacture of heads, e.g. inductive
33Structure or manufacture of flux-sensitive heads, ; i.e. for reproduction only; Combination of such heads with means for recording or erasing only
39using magneto-resistive devices ; or effects
3903using magnetic thin film layers or their effects, the films being part of integrated structures
3967Composite structural arrangements of transducers, e.g. inductive write and magnetoresistive read
G11B 5/6005
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
48Disposition or mounting of heads ; or head supports; relative to record carriers
58with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
60Fluid-dynamic spacing of heads from record-carriers
6005Specially adapted for spacing from a rotating disc using a fluid cushion
Applicants
  • CENSTOR CORPORATION [US]/[US]
Inventors
  • PAYNE, Alexander
  • CAIN, William
  • DEVILLIER, Michael
  • HAMILTON, Harold
  • HEMPSTEAD, Robert
  • IMAI, Darren
  • LAUER, Mark
  • LATEV, Dimitre
  • ROBERTS, David
Agents
  • LAUER, Mark
Priority Data
08/577,49322.12.1995US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) HARD DISK DRIVE HAVING RING HEAD SLIDING ON PERPENDICULAR MEDIA
(FR) UNITE DE DISQUE DU COMPRENANT UNE TETE ANNULAIRE GLISSANT SUR UN SUPPORT PERPENDICULAIRE
Abstract
(EN)
An information storage system having a ring head (220) sliding on a rigid magnetic storage disk in such close proximity that the magnetic field felt by the media layer or layers of the disk has a larger perpendicular than longitudinal component so that data is stored in a perpendicular mode. The head to media separation during writing of data to the media is a small fraction of the amagnetic gap (160) separating the poletips (155, 157) of the head. Reading of data may be inductive or may be via a magnetoresistive sensor (222) which is coupled to the magnetically permeable core of the ring head far from the poletips. The media preferably has a high perpendicular anisotropy.
(FR)
Un système de stockage d'informations comprend une tête annulaire (220) qui glisse sur un disque d'enregistrement magnétique dur avec une proximité telle que le champ magnétique ressenti par la ou les couches de support d'informations du disque possède une composante perpendiculaire supérieure à la composante longitudinale, ce qui permet aux données d'être stockées d'une manière perpendiculaire. La séparation tête/support pendant l'écriture des données sur le support représente une petite fraction de l'intervalle amagnétique (160) qui sépare les extrémités polaires (155, 157) de la tête. La lecture des données peut être inductive ou peut s'effectuer par l'intermédiaire d'un capteur magnéto-résistif (222) qui est couplé au noyau magnétiquement perméable de la tête annulaire loin des extrémités polaires. Le support présente de préférence une anisotropie perpendicularie élevée.
Also published as
Latest bibliographic data on file with the International Bureau