YC Demo Day startup touts ultra-pure diamond wafers for data centers, $160M in LOIs
ycombinator · x · 2026-09-11
At YC's Demo Day, a startup called Kara pitched ultra-pure diamond wafers for data centers, claiming $160M in letters of intent already signed.
Diamond's thermal conductivity makes it a candidate for cooling dense AI compute, prompting the question of whether silicon's dominance is under threat. Details remain at the demo stage — no production or customer traction has been shown yet.
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