Ayar Labs, which is replacing the copper wiring in semiconductors with fiber optics, raised a $500M Series E led by Neuberger Berman at a $3.8B valuation (Robbie Whelan/Wall Street Journal)

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Robbie Whelan / Wall Street Journal:Ayar Labs, which is replacing the copper wiring in semiconductors with fiber optics, raised a $500M Series E led by Neuberger Berman at a $3.8B valuation  —  Ayar Labs, which is replacing the copper wiring in semiconductors with fiber optics, is valued at $3.8 billion in the deal