Silicon wafer ultrasonic cleaning machine is an industrial grade equipment used for removing surface pollutants from silicon wafers in semiconductor manufacturing and photovoltaic cell production. Its main function is to remove pollutants such as organic matter, particles, metal impurities, and oxide layers on the surface of silicon wafers through ultrasonic technology, while maintaining the surface characteristics of the wafer without damage.
The silicon wafer ultrasonic cleaning machine utilizes the pressure fluctuations generated by the propagation of ultrasonic waves in liquid to form tiny bubbles that release strong impact force when they collapse instantly, peeling off dirt from the surface of the silicon wafer. Suitable for silicon wafers with complex geometric shapes.
Ultrasonic cleaning machines for silicon wafers are widely used in the semiconductor manufacturing process to remove surface contaminants from silicon wafers and related vessels. They are suitable for cleaning needs in key stages such as pre diffusion, post lithography, and pre oxidation. In the production of photovoltaic cells, this equipment has become a key equipment in the silicon wafer manufacturing process due to its micrometer level cleaning accuracy and intelligent process control. It can effectively remove cutting damage layers, micrometer level impurities, and organic pollution.
The working principle of the silicon wafer ultrasonic cleaning machine mainly relies on the ultrasonic cavitation effect. When the ultrasonic generator generates high-frequency vibration, the bubbles in the cleaning solution will rapidly expand and rupture, generating instantaneous high temperature and high pressure shock waves, thereby peeling off pollutants on the surface of the silicon wafer. Specifically, the ultrasonic cavitation effect generates millions of tiny bubbles in the cleaning solution, which release large amounts of energy upon rupture, effectively removing particles, residual photoresist, or oxide layers from the surface of silicon wafers.
The core principle of silicon wafer ultrasonic cleaning machine is based on the cavitation effect of ultrasonic waves:
The ultrasonic generator generates high-frequency electrical signals (usually in the frequency range of 20kHz-120kHz), which are converted into mechanical vibrations through a transducer, forming countless tiny bubbles in the cleaning solution.
Bubbles rapidly expand and rupture under the action of sound pressure, producing local high temperatures (about 5000K) and high pressures (about 1000atm), forming shock waves that strip organic matter, particles, metal impurities, and natural oxide layers from the surface of silicon wafers.
High frequency ultrasound (above 40kHz) is suitable for cleaning small particle dirt to avoid damaging the surface of silicon wafers; Low frequency ultrasound (20-40kHz) is more suitable for removing stubborn pollutants.