Introduction:

Solar energy is a rapidly growing form of energy, and the solar energy market has made great progress in the past decade. The best way to use solar energy is photovoltaic conversion, that is, the photovoltaic effect is used to make the sunlight hit the silicon material to generate electricity directly. The photoelectric conversion industry chain formed by the application and development of silicon materials is called “photovoltaic industry”, which includes the production of high-purity polysilicon raw materials, the production of solar cells, the production of solar cell modules and the manufacture of related production equipment.

Photovoltaic silicon wafer is a kind of wafer made of silicon material, which is a necessary material for the production of photovoltaic solar energy. Most of its polysilicon and solar cells need to be manufactured in purification workshop. The production process of its main supporting facilities includes:

1. Different grades of purification workshop compartments corresponding to the stages from silicon wafer preparation to etching and printing of device production are divided into Class 1K and 10K sub-products with different cleanliness requirements.

2. Production processes related to epitaxial wafers, chips and packages;

3. The technological process of solar cells is as follows: loading → ultrasonic cleaning → texturing → deionization cleaning →IPA dehydration → diffusion → plasma edge etching → dephosphorization of silicon glass →IPA dehydration →PECVD→ motor sintering → classification detection → packaging and warehousing.

4. Production supporting systems such as compressed air, special gas, organic exhaust, acid-base exhaust, hot exhaust, process cooling water, vacuum and pure water;