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   NVIDIA Weighs PTFE for Next-Generation AI Switch Boards

   NVIDIA exhibited its latest NVLink switch board at the October OCP summit and is considering PTFE for high-speed signal transmission, PCB industry analysts told TechNews. The reported plans include introducing low-dielectric-loss PTFE into the Rubin Ultra switch board or a next-generation orthogonal midplane to reduce signal attenuation. PTFE’s low dielectric loss could support high-speed PCB design, but its poor compatibility with other materials and difficulty forming multilayer boards require a mixed-material approach; the report says PTFE alone cannot be used to make dozens-of-layers AI server boards.

   科技新报 · 🔥 5

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