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

摘要

One 90 degree of curved metal waveguides, c shapes hole with a taper, it is a kind of for manufacturing identical method, using a light transmission module of waveguide, and be arranged to improve coupling efficiency using a heat assisted magnetic recording head of waveguide, increase the width of an input stage by the profile matching of the polymer waveguide with a taper. Inside a metal waveguide (111) is made of conductive metal (112) and including a hole (113). Between an input stage (111a) and an output stage (111b), hole is bent to the moving direction for changing light, with a tapered configuration, wherein a width becomes narrower as reaching output stage between bent part and output stage, with a c shape shapes, by forming a ridge unit (114) with stretching out on an inner surface of metal. One thickness of the metal waveguide of the part from the bent part in hole to taper is greater than the metal waveguide from input stage to bent part.