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The Tiny Switches Powering Your Smartphone A modern transistor is so small that calling it “tiny” almost feels like an insult. In advanced chips from companies like Intel and TSMC, critical transistor features are measured in just a few nanometers. 1 nanometer is one billionth of a meter. For perspective, a human hair is roughly 80,000–100,000 nanometers wide. That means thousands of microscopic transistor features can fit across the width of a single hair. Inside a modern smartphone proces
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