Wafers are the basic materials for semiconductors and chips, so their production directly affects the production of semiconductors and chips. In the actual production process of wafers, not only is the manufacturing difficulty high and the process complex, but the production process is also accompanied by a large amount of industrial wastewater. So, how do wafer manufacturing factories solve the problem of industrial wastewater?

Wafer wastewater

During the wafer manufacturing process, there will be industrial wastewater such as acidic and alkaline wastewater, ammonia containing wastewater, fluoride containing wastewater, grinding wastewater, copper containing wastewater, organic wastewater, etc. Different production processes result in different types of industrial wastewater. Moreover, the pollutants mainly involved in these wastewater are also different, and the wastewater treatment processes used are also different. Therefore, it is not possible to use the same sewage treatment plant for treatment, and it is necessary to separate the quality and flow of wastewater according to different types.

Grinding is a key technology for the full planarization of wafers in the manufacturing process of semiconductor integrated circuit boards. In the subsequent process after wafer grinding, ultra pure water is used to clean it, generating a lot of grinding wastewater. This type of wastewater contains high concentrations of small grinding silicon particles, chemical agents, ultra pure water, and metal ions that exist in various situations. The harm of semiconductor grinding wastewater is obvious.

In the current situation of increasingly severe water source pollution and damage, it has become an urgent issue to meet the requirements of energy conservation and emission reduction, and how to fully, reasonably and effectively reuse such wastewater quality to alleviate water scarcity. There are many treatment methods for the reuse of semiconductor grinding wastewater. Due to the application and development of semiconductor wastewater treatment technology, the process has been continuously improved, the process has become more compact, and the treatment efficiency has been improved.

The total recovery rate of the Literide wastewater recycling equipment is greater than 75%, and the wastewater is recycled through the wastewater recycling equipment, thus saving more than 75% of the wastewater discharge cost. The system adopts a new technology of special membrane separation, with simple process, stable and reliable operation, and high processing efficiency. Wastewater reuse equipment can not only effectively save limited water resources, thereby reducing the consumption of water resources and easing the increasingly prominent water shortage contradiction, but also reduce the discharge of sewage, alleviate pollution to surrounding water bodies, and improve the human living environment.