Miniature transformer for read/write transducer
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United States of America Patent
Stats
-
Nov 3, 1998
Grant Date -
N/A
app pub date -
May 5, 1992
filing date -
May 5, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A thin film transformer with improved magnetic properties has a bottom pole member supported over a substrate, a top pole member and an intermediate multi-turn thin film coil. The top and bottom pole members form a closed magnetic path, and the coil surrounds one of the legs of the magnetic path. The top pole member, the bottom pole member or both are formed as a plurality of individual laterally spaced pole elements each forming a closed magnetic path with the other pole member. The lateral spacing of the pole elements substantially reduces eddy current build-up in the magnetic path. The bottom pole member in the region of the leg encircled by the coil has a plurality of spaced support members and the top pole element is formed over the support members to provide additional magnetic material at the join site.
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