STEM与日常科技·英语30篇（1）
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Why Semiconductor Cleanrooms Matter
半导体洁净室为什么重要
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Modern microchips contain transistors smaller than 5 nanometers — about 1/10,000 the width of a human hair.
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A single speck of dust larger than a transistor could break an entire circuit pattern during photolithography.
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Cleanrooms use advanced air filtration, positive pressure, and strict gowning protocols to limit particles to fewer than 10 per cubic meter.
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Workers wear full-body suits, gloves, masks, and shoe covers to prevent skin flakes, hair, or fibers from contaminating wafers.
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Even airflow is carefully engineered: laminar flow pushes particles downward and away from sensitive silicon surfaces.
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Vibrations, temperature swings, and static electricity are also tightly controlled, since they can distort nanoscale etching.
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Without such environments, mass production of smartphones, medical scanners, or electric vehicle controllers would be impossible.
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Each chip wafer passes through hundreds of steps across multiple cleanrooms — any contamination risks scrapping thousands of chips.