Metal working – Method of mechanical manufacture – Electrical device making
Patent
1990-04-24
1991-12-31
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
360122, 360124, 360125, G11B 542
Patent
active
050759566
ABSTRACT:
A recording head includes at least one magnetic pole and magnetic side shields adjacent to the pole, the side shields disposed to shield the pole from adjacent tracks on a magnetic medium. Embodiments are disclosed for both longitudinal and vertical recording in monopole, two-pole, and three-pole heads, including inductive, MR and Hall-type read elements. A magnetic head capable of detecting flux from a target source among a group of sources, includes at least one magnetic pole and a magnetic shield, the shield providing to the pole 360.degree. of magnetic shielding against sensing by the pole of flux other than the target source. Also disclosed is an alternate flux return conductor being separated at the pole tip from the shield section by a non-magnetic insulation layer. A shielded magnetic head may have two outer magnetic poles, the two outer poles acting as the magnetic shield for a center pole, whereby the outer poles can be used for writing and the center pole can be used for reading.
REFERENCES:
patent: 3355727 (1963-07-01), Gaubatz
patent: 3700828 (1972-10-01), Zacaroli
patent: 3881190 (1975-04-01), Brock et al.
patent: 3908194 (1975-09-01), Romankiw
patent: 3921217 (1975-11-01), Thompson
patent: 3947889 (1976-03-01), Lazzari
patent: 4071868 (1978-01-01), Kaminaka et al.
patent: 4195323 (1980-03-01), Lee
patent: 4255772 (1981-03-01), Perez et al.
patent: 4281357 (1981-07-01), Lee
patent: 4335410 (1982-06-01), Neu
patent: 4356524 (1982-10-01), Watanabe
patent: 4357640 (1982-11-01), Heinz et al.
patent: 4374403 (1983-02-01), Oshima et al.
patent: 4376337 (1983-03-01), Kobayashi et al.
patent: 4385334 (1983-05-01), Yanagida
patent: 4425593 (1984-01-01), Postma
patent: 4458279 (1984-06-01), Katz
patent: 4633352 (1986-12-01), Mizoguchi et al.
patent: 4636897 (1987-01-01), Nakamura et al.
patent: 4651243 (1987-03-01), Daste et al.
patent: 4652954 (1987-03-01), Church
patent: 4656546 (1987-04-01), Mallory
patent: 4663685 (1987-05-01), Tsang
patent: 4667260 (1987-05-01), Perlov et al.
patent: 4672493 (1987-06-01), Schewe
patent: 4675766 (1987-06-01), Schewe
patent: 4684438 (1987-08-01), Lazzari
patent: 4698711 (1987-10-01), Vinal
patent: 4700252 (1987-10-01), Muraoka et al.
patent: 4713710 (1987-12-01), Soda et al.
patent: 4727643 (1988-03-01), Schewe et al.
patent: 4748525 (1988-05-01), Perlov
patent: 4758917 (1988-07-01), Gooch
patent: 4803580 (1989-02-01), Mowry
patent: 4837924 (1989-06-01), Lazzari
patent: 4891725 (1990-01-01), Mowry
patent: 4907113 (1990-03-01), Mallary
patent: 4912584 (1990-03-01), Mallary et al.
patent: 4935832 (1990-06-01), Das et al.
Shew, IBM Technical Disclosure Bulletin, vol. 2, No. 2, Aug. 1959, Shows Two-Pole, Twin-Track Magnetic Read Heads.
Vinal, IBM Technical Disclosure Bulletin, vol. 26, No. 7B, Dec. 1983, Shows a Two-Pole, Twin-Track Magnetic Read Head.
Jeffers, "Magnetoresistive Transducer with Canted Easy Axis", IEEE Transactions on Magnetics, vol. MAG-15, No. 6, Nov. 1979, pp. 1628-1629.
Digital Equipment Corporation
Hall Carl E.
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