Patent ID: 9323010
Filing Date: 2016-04-26
CPC Classification: G02B,Y10T

Claim Text:
1. A method for fabricating an interposer for interfacing a plurality of waveguides to one or more transducers, the method comprising: forming a first cavity in a top surface of a substrate; forming a first layer over the first cavity's bottom surface, with one or more gaps in the first layer's top surface; forming a second layer in the one or more gaps, the second layer overlapping the first layer; and removing at least part of the first layer to form a plurality of channels separated from each other by portions of the second layer that are located in the one or more gaps, the second layer portions in the one or more gaps providing one or more spacers in the first cavity, the one or more spacers at least partially covering the channels, wherein the plurality of channels are for supporting the waveguides for transmitting electromagnetic waves, wherein the waveguides are to be coupled to the one or more transducers; wherein removing at least part of the first layer comprises removing at least part of the first layer from under the second layer; wherein the method further comprises: forming one or more conductive paths passing through the substrate outside the cavity, each conductive path passing between the top surface of the substrate and a bottom surface of the substrate; attaching the one or more transducers above the substrate, each transducer extending over at least one said channel for being optically coupled to at least one waveguide in the channel, each transducer being electrically coupled to at least one said conductive path; attaching a controller below the substrate, the controller being electrically coupled to each transducer by electrical circuitry comprising at least one said conductive path.