MASKLESS FABRICATION OF WAVEGUIDE MIRRORS

摘要

A method of fabricating a waveguide mirror that involves etching a trench in a silicon substrate; depositing a film (e.g. silicon dioxide) over the surface of the silicon substrate and into the trench; ion etching the film to remove at least some of the deposited silicon dioxide and to leave a facet of film in inside corners of the trench; depositing a layer of SiGe over the substrate to fill up the trench; and planarizing the deposited SiGe to remove the SiGe from above the level of the trench.