Headway Technologies, Incorporated

Ya-An Yang

Xuhui Jin

Weihao Xu

Matteo Staffaroni

Jianing Zhou

Dayu Zhou

A thermally assisted magnetic recording head is disclosed having a spot size converter with at least one secondary waveguide adjoining a top or bottom surface of a primary waveguide. Each waveguide has tapered sides but the secondary waveguide is tapered at a greater angle over a shorter taper distance in order to couple propagated light into the primary waveguide before the front end of the taper. The secondary waveguide terminates in a ridge with a fixed width wof about 50-170 nm that is between the front end of the taper and the air bearing surface (ABS). The ridge enables transverse magnetic (TM) transmission mode efficiency above 90% even with a typical process misalignment in the cross-track and height directions. The primary waveguide has a front section with width wbetween an end of its tapered sides and the ABS where wis substantially larger than w

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Fremont, CA, United States of America

Ya-An Yang