AttoTude

AttoTude is a semiconductor and interconnect company founded in 2024 and headquartered in Menlo Park, California. It develops ASICs Over Dielectric interconnect technology, which couples advanced ASICs directly to low-loss dielectric waveguides to provide high-bandwidth, energy-efficient data centre connectivity. The approach is positioned as an alternative to optical interconnects for AI and hyperscale applications, aiming to avoid the cost, power draw and complexity associated with optics while exceeding the performance of conventional copper.

The company's technical work spans terahertz (THz) interconnect technology, ASIC design and integration, dielectric waveguides and high-speed parallel processing interconnects. Its product set includes the ASICs Over Dielectric platform; Dielectrically enhanced TwinAx (DiAx™), which carries signals between ASICs over low-loss dielectric waveguides; and THz-frequency interconnect intended to address the bandwidth, power and reliability constraints that AttoTude identifies as limiting AI infrastructure growth.

AttoTude targets AI data centres, hyperscale data centres and supercomputing or high-performance computing environments. The company emerged from stealth mode at OFC 2025, presenting its case for replacing optical interconnects in AI data centres with terahertz-based dielectric interconnect.