High resistivity silicon wafers are specialized semiconductor materials with significantly reduced electrical conductivity. These wafers, typically used in radio frequency (RF) and microwave applications, provide improved signal integrity, reduced power loss, and enhanced device performance. They are essential for 5G communication, sensors, and high-frequency electronics.

What is a High Resistivity Silicon Wafer?
A high resistivity silicon wafer is a silicon substrate with a resistivity typically above 1000 Ω·cm. Standard silicon wafers have lower resistivity, making them more conductive, but high resistivity wafers minimize interference and signal loss, making them ideal for high-frequency applications.

Key Properties of High Resistivity Silicon Wafers
Low Electrical Conductivity – Reduces interference in RF and microwave circuits.

Excellent Signal Isolation – Minimizes signal loss and crosstalk.

High Purity and Low Defect Density – Ensures superior performance in semiconductor devices.

Compatible with CMOS Technology – Enables integration with existing semiconductor processes.

Manufacturing Methods
Float-Zone (FZ) Silicon – Produces ultra-high resistivity wafers with minimal impurities.

Czochralski (CZ) Silicon with Oxygen Annealing – Enhances resistivity by trapping impurities.

SOI (Silicon-On-Insulator) Technology – Provides better electrical isolation for high-speed applications.