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After silicon wafers are loaded into a hightemperature oxidation furnace, oxygen or water vapor reacts with silicon. The dryoxygen reaction is expressed as Si＋O₂→SiO₂; the wetoxygen reaction is written as Si＋2H₂O→SiO₂＋2H₂.

High-resistivity silicon (with resistivity above 1,000 Ω·cm) holds an irreplaceable position in RF MEMS devices. Thanks to its ultra-low net doping concentration (below \(10^{12}\ \mathrm{cm^{-3}}\)), it delivers extremely low RF substrate loss.

The four-point probe method is a common technique for measuring the resistivity and sheet resistance of semiconductor materials. Its basic principle involves placing four equally spaced probes on the sample surface. A constant current is applied through the two outer probes...

Temperature changes are unavoidable during semiconductor processing, bonding, coating, and packaging. When glass wafers experience heating or cooling, their dimensions change according to their thermal expansion characteristics. The glass wafer thermal properties directly influence process compatibility, especially when wafers are combined with silicon, metals, polymers, or other materials.

Sapphire substrates are widely used in semiconductor, optical, and electronic applications because of their high hardness, thermal stability, and excellent optical properties. However, the performance of a sapphire substrate depends strongly on crystal quality, surface condition, dimensional accuracy, and internal defect control.

Semiconductor wafers require strict inspection before entering device fabrication because even microscopic defects can influence production yield, electrical performance, and process stability. Modern semiconductor manufacturing involves dozens of precision steps, including lithography, deposition, etching, implantation, and packaging.

Sapphire ingot is a high-performance crystalline material widely used in industries that require excellent hardness, optical transparency, thermal stability, and chemical resistance. Although sapphire is commonly associated with gemstones, industrial sapphire plays an important role in semiconductor manufacturing, optical systems, LED production, and precision components.

Through Glass Via, commonly known as TGV, is an advanced interconnection technology that creates vertical electrical pathways through glass substrates. It is widely considered an important approach for advanced packaging, optical integration, and high-frequency electronic applications.

Glass wafer flatness is one of the most important parameters affecting precision manufacturing performance. In semiconductor, optical, and advanced packaging applications, even small variations in wafer geometry can influence coating uniformity, bonding accuracy, lithography results, and overall process stability.

Fused silica wafers are widely used in applications that require excellent optical performance, chemical stability, and thermal resistance. Compared with conventional glass materials, fused silica provides outstanding purity, low thermal expansion, and high transmission characteristics, making it suitable for demanding environments.

Silicon wafer inspection is a critical step in semiconductor manufacturing because wafer quality directly influences device performance, production yield, and process stability. Before wafers enter processes such as lithography, etching, ion implantation, or thin-film deposition, manufacturers need to verify surface conditions, dimensional accuracy, and material consistency.

For silicon wafers or Silicon-On-Insulator (SOI) substrates, resistivity is typically adopted on datasheets to characterize their fundamental electrical parameters. Silicon wafers are generally classified into high-resistivity silicon and low-resistivity silicon. High-resistivity silicon contains extremely low impurity concentrations, usually below \(10^{12}\ \mathrm{cm^{-3}}\), resulting in ultra-high resistivity ranging from 1,000 to 10,000 Ω·cm.