Automatic throat height control for film heads
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United States of America Patent
Stats
-
Apr 16, 1985
Grant Date -
N/A
app pub date -
May 7, 1982
filing date -
May 7, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lapping guide is provided to determine the position at which lapping of a thin film head to define pole faces should be terminated. Accurate positioning of the lapping guide with respect to the head is insured by forming various elements of the lapping guide during the same photolithographic process steps as those used to form elements of the head. The lapping guide may be used either as an electrical or optical guide. When used as an optical guide, a second lapping guide may be provided as an indicator that more frequent inspection is necessary.
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Family
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Cited Art Landscape
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