Dynamic magnetic information storage or retrieval – Head – Plural gaps
Patent
1990-06-18
1992-01-28
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Head
Plural gaps
G11B 5265, G11B 529
Patent
active
050847970
ABSTRACT:
A core block almost square in cross section has two winding grooves cut in its two polished sides forming one of its four corners. The grooved sides of the core block are vapor-deposited with a gap spacer to form magnetic gaps. Two side blocks, which have their one side cut with inclined track grooves, are bonded to the two sides of the core block, with the track groove sides in contact with the core block. At this time, the side blocks are adjusted to align the corresponding slant track grooves in the two side blocks. This ensures that the gap heights are equal in a single head chip, which in turn eliminates a time-consuming pairing process required with conventional manufacturing method. The assembled block is cut at their corners and then sliced along the slant track grooves to form a number of head chips. The slant top portion of the sliced chip is then cut perpendicularly with respect to the sides of the chip so that the two magnetic gaps on the head front are inclined in opposite directions at desired azimuth angles. The head thus manufactured employs sub-coils to eliminate the crosstalk between the two magnetic gaps.
REFERENCES:
patent: 4390915 (1983-06-01), Matsuyama
patent: 4768120 (1988-08-01), Hatanai
Heinz A. J.
Pioneer Electronic Corporation
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