90°-BENT METALLIC WAVEGUIDE HAVING TAPERED C-SHAPED APERTURE, METHOD OF FABRICATING THE WAVEGUIDE, LIGHT DELIVERY MODULE INCLUDING THE WAVEGUIDE, AND HEAT ASSISTED MAGNETIC RECORDING HEAD HAVING THE WAVEGUIDE

摘要

A metallic wave guide and a light delivery module are provided. The metallic waveguide includes a metal body formed of a conductive metal and having an aperture formed therethrough, the aperture having input and output ends. The aperture has a bent portion for changing a light traveling direction between the input and output ends, and a tapered portion between the bent portion and the output end. The tapered portion has a width that is gradually reduced toward the output end, and the aperture is formed in a C-shape by a ridge formed on an inner surface of the metal body.