Dynamic magnetic information storage or retrieval – Head – Head surface structure
Patent
1983-11-22
1987-10-13
Hecker, Stuart N.
Dynamic magnetic information storage or retrieval
Head
Head surface structure
360125, G11B 5187
Patent
active
047002530
ABSTRACT:
A magnetic pole head for recording and playback is described. Its features, as illustrated in FIG. 1 are: a high permeability core 1, a magnetic field producing means 3, and an acute angle .phi. between the bottom surface and side surface at the trailing portion of the head (i.e. the portion which influences the recording medium 5 last). It has been found that this improved pole head significantly increases the derivative of vertical magnetic field intensity with respect to lateral distance. This increase in the rate at which vertical field intensity changes will allow for higher density perpendicular recording than is feasible with conventional vertical heads.
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Gerber Joel A.
Sievers Jerry A.
Hecker Stuart N.
Little Douglas B.
Minnesota Mining and Manufacturing Company
Sell Donald M.
Severin David J.
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