Square Photovoltaic Silicon Wafer

Square Photovoltaic Silicon Wafer – Photoresist Coater – Cheersonic

In addition to making chips, silicon wafers are also an extremely important part in the field of photovoltaics.

Photovoltaic power generation is a form of power generation that uses the photovoltaic effect of silicon wafers to directly convert sunlight radiant energy into electrical energy. The photovoltaic effect of crystalline silicon is applicable to both polycrystalline and single crystal, but monocrystalline silicon has complete crystals, uniform optical and electrical properties, higher mechanical strength, and more efficient photoelectric conversion, so the conversion efficiency of single crystal cells can be 2 times higher than that of polycrystalline cells -3 percentage points.

The early stage of the preparation process of photovoltaic monocrystalline silicon is the same as that of chip monocrystalline silicon. First, the high-purity silicon is heated to a molten state, and then a single crystal silicon rod is pulled out from it. Before slicing, photovoltaic silicon will first cut the silicon rod into a cuboid, so that the cross section of the silicon wafer becomes a square. The reason for using a square shape is also very simple. If the photovoltaic cell is circular, there will be gaps in the middle of the solar panel when multiple cells are arranged, which reduces the overall conversion rate.

Compared with chips, the requirements for the purity of silicon in the manufacture of photovoltaic panels are slightly lower, and the purity standard only needs to be 99.9999%, which cannot reach 99.999999999% for making chips.

Ultrasonic spray systems have proven useful in a variety of applications requiring uniform, repeatable coatings of photosensitive materials (photoresist or polyimide films). Thickness control ranges from submicron to over 100 microns and is capable of coating any shape or size.

High Uniformity and Uniformity
Micro-flow spraying, various liquid feeding schemes
high liquid utilization

About Cheersonic

Cheersonic is the leading developer and manufacturer of ultrasonic coating systems for applying precise, thin film coatings to protect, strengthen or smooth surfaces on parts and components for the microelectronics/electronics, alternative energy, medical and industrial markets, including specialized glass applications in construction and automotive.

Our coating solutions are environmentally-friendly, efficient and highly reliable, and enable dramatic reductions in overspray, savings in raw material, water and energy usage and provide improved process repeatability, transfer efficiency, high uniformity and reduced emissions.

Chinese Website: Cheersonic Provides Professional Coating Solutions