Optical Waveguide Glass Substrate

This technology integrates a glass interposer with thin-film optical waveguide technology to establish an integrated design, manufacturing, and validation platform for next-generation AI high-speed computing modules. It adopts a low-loss glass substrates/interposers, on which thin-film optical waveguides are constructed. The optical signal is vertically coupled in from the central grating and then transmitted along a compact spiral path, enabling ultra-long optical delay and wavelength-selective functions within an extremely small footprint.

When the optical signal reaches the end of the waveguide and undergoes photoelectric conversion, the resulting electrical signal can be vertically transmitted directly to the backside of the substrate through the TGV conductive vias located immediately beneath it. This architecture minimizes the electrical transmission distance to the greatest extent possible. Combined with the high insulation properties of glass, it can effectively eliminate parasitic capacitance and signal crosstalk. In addition, the excellent coefficient of thermal expansion (CTE) matching between glass and chips ensures long-term alignment stability of micron-scale optical coupling interfaces under the thermal conditions generated by high-speed computing.