A thermal oxide silicon wafer has a deliberately grown silicon dioxide (SiO₂) layer on its surface, while a bare silicon wafer has no intentionally formed oxide layer. The choice depends on electrical insulation, surface chemistry, device structure, and subsequent fabrication requirements.
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2026-10-24
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2026-09-17Thermal oxide silicon is used when a silicon wafer requires a controlled silicon dioxide layer with strong interface quality, stable insulation, and predictable thickness. The oxide is formed by heating the silicon wafer in an oxygen-rich or steam-based environment, allowing the surface of the silicon to react and grow an oxide film.