The role of compressed air and nitrogen in semiconductor cleaning equipment

In semiconductor cleaning equipment, compressed air and nitrogen each play a key role, the specific role is as follows:

the role of compressed air

1. purging and Cleaning:

   • remove tiny dust and residue during the semiconductor manufacturing process, tiny dust, particles, or chemical residues may adhere to the wafer surface. Compressed air through high-pressure injection, can effectively purge these impurities, to ensure the cleanliness of the wafer surface.
   • Make sure the surface is dry: Moisture may remain on the surface of the cleaned wafer. Compressed air can quickly dry the wafer to avoid the influence of moisture on subsequent process steps.

2. Drive equipment:

   • provide mechanical energy compressed air can be used to drive the pneumatic components in the cleaning equipment, such as cylinders, valves, etc., to realize the automatic operation of the equipment.
   • Support precision control during the cleaning process, the compressed air can be used through the precise pneumatic control system to realize the uniform spraying of the cleaning liquid and the precise handling of the wafer.

3. Maintain environmental stability:

   • control temperature and humidity: In the semiconductor manufacturing environment, compressed air can meet the strict requirements of cleaning equipment on environmental conditions by adjusting temperature and humidity.
   • Isolate pollution source compressed air systems are usually equipped with high-efficiency filtering devices, which can remove oil, moisture and particulate matter in the air and prevent these pollutants from entering the cleaning equipment and affecting the cleaning effect.

The role of nitrogen

1. protective gas:

   • prevent oxidation nitrogen is a chemically stable gas that can effectively isolate oxygen and moisture in the air and prevent semiconductor materials from being oxidized or contaminated during the cleaning process.
   • Maintain purity: In the cleaning equipment, nitrogen can be used to purge the inside of the equipment and pipelines to remove residual harmful gases or impurities to ensure the purity of the cleaning environment.

2. control reaction atmosphere:

   • adjust the reaction conditions: In some cleaning processes, nitrogen can be used as a regulating gas for the reaction atmosphere. By controlling the flow and concentration of nitrogen, the chemical properties of the cleaning solution can be adjusted to optimize the cleaning effect.
   • Prevention of side reactions nitrogen can inhibit the side reactions that may occur in the cleaning process, such as oxidation, reduction, etc., to ensure the stability and controllability of the cleaning process.

3. Drying and stable heating:

   • provide dry environment: Nitrogen can be used to dry and clean the wafer. By purging the surface of the wafer, the residual moisture and cleaning fluid are removed to ensure that the surface of the wafer is dry and clean.
   • stable heating process in the heat treatment process, nitrogen can be used as a protective gas to prevent the semiconductor material from reacting with oxygen at high temperatures to form an oxide layer, which will affect the performance and reliability of the device.