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🎙️ NEW EPISODE: MicroVCSELs vs MicroLEDs, a MicroExplainer Austin and Vik host an explainer on the two competing microemitter technologies for AI interconnects, microLEDs and microVCSELs. They break down Credo's surprising pivot at OCP from its microLED acquisition to a microVCSEL product, and the physics that give microVCSELs better...

18,249 görüntüleme • 12 gün önce •via X (Twitter)

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🎙️ NEW EPISODE: GlobalFoundries Thomas Barber: CPO, Silicon Photonics, 300mm, SiGe, OCI, NRZ "The enemy to me right now is copper," says Tom Barber. Austin sits down with Tom to unpack why GF thinks it can lead the shift to optical interconnects twice over: once with its long-running silicon photonics platform, and again with the specialty Silicon Germanium process the industry needs to drive it. Key Takeaways - CPO's real win isn't speed, it's power: saving 20-25 pJ/bit frees part of a data center's fixed 50-100 MW budget to go toward compute instead of moving bits. - GlobalFoundries leads photonics revenue for an unglamorous reason: it moved to 300mm wafers early, which yields 2.25x more die per wafer than the 200mm lines rivals still run. - CPO can end up more reliable than the pluggables it's replacing, not less, because it deletes the physical plug connector, and dust at that connector is the leading cause of field failures. - The OCI MSA picks NRZ over faster PAM4, deliberately going wide and slow, because NRZ's native bit error rate is a million times lower, which simplifies the receiver and cuts power. - GlobalFoundries stacks two specialty processes into one edge: micro-mirror couplers on the photonic side, and Silicon Germanium transistors hitting 350-400 GHz on the electrical side driving them. - The real competitor for silicon photonics isn't another foundry, it's copper itself — and that market is big enough that GlobalFoundries and TSMC can both win without taking share from each other. Chapters: 0:00 GlobalFoundries in Photonics 1:21 GF's Photonics Strategy 3:02 GF's Market Leadership 5:06 300mm Wafer Advantage 6:55 Copper's Range Limits 9:18 Pluggable to CPO 13:48 CPO Reliability 19:22 OCI MSA Explained 26:20 GF's Scale Platform 29:04 Micro Mirror Technology 31:32 Photonics vs. Copper 38:25 Silicon Germanium Advantage Get more of Austin and Vik daily, free! Sign up: Connect with Vik and Austin: Vik's Paid Substack: Austin's Paid Substack: Austin Lyons Vikram Sekar

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