Magneto-optical head involving solid immersion lens with two-layer heat-dispersive coil
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United States of America Patent
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Mar 4, 2003
Grant Date -
N/A
app pub date -
Jul 26, 2000
filing date -
Jul 26, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A magneto-optical head with a centrally-located solid immersion lens and a coil formed radially about the lens advantageously utilizes an insulating material with a relatively high thermal conductivity for isolating the coil and avoiding heat damage to the head when current is passed through the head during a write operation. First and second coils in first and second coil layers are coupled by a via to form a continuous coil. A combination of a chemical-mechanical contouring operation and the lack of any intervening low thermal conductivity material adjacent the coil effectively produces an insulation layer that is thin but has a contour with a very smooth surface, resulting in a highly compact multiple-level coil.
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