You can buy polycrystalline silicon wafer from the polycrystalline silicon manufacturers PAM-XIAMEN. Poly crystal silicon is a form of elemental silicon. Polysilicon wafer is the foundation of the microelectronics industry and the photovoltaic industry. As a high-tech product, it spans multiple disciplines and fields of chemical machinery, electronics, industry, metallurgy, etc. It is an important raw material for the semiconductor, large-scale integrated circuit and solar cell industry. We have a large selection of polycrystalline Si wafers. Please let us know what specs and quantity you would like us to quote?
1. Specs of Polysilicon Wafer
Below is just one recent order!
Si Wafer Polycrystalline 3″, 350um, DSP
2. Differences between Polycrystalline Si Wafer and Monocrystalline Si Wafer
Compared with monocrystalline silicon wafers, polycrystalline silicon wafers have obvious polycrystalline characteristics, with individual crystal grain shapes on the surface, while the surface color of single crystal silicon wafers is uniform. Because of the use of silicon rods, monocrystalline Si wafers have round corners with large chamfers, while polycrystalline Si wafers generally use small chamfers.
The main difference between polycrystalline silicon and monocrystalline silicon is displayed in physical properties. For example, silicon in polycrystalline structure is inferior to single crystal silicon in mechanical properties and electrical properties. Polycrystalline silicon can be used as a raw material for pulling silicon single crystal. Metallurgical grade silicon is not difficult to produce. It manufactured by quartz sand with reduction of carbon in an electric arc furnace. The silicon purity is about 98-99%. However, the silicon wafer used in the semiconductor industry must be highly purified. The purity of polysilicon in electronic grade requires 11N while the solar cell grade requires 6N.
3. Connections of Single and Poly Crystal Silicon Wafer
Semiconductor grade (including solar grade) polycrystalline silicon is converted to single crystal silicon, which means that randomly connected crystals in polycrystalline silicon are transformed into a large single crystal. Monocrystalline silicon wafer is used to manufacture most silicon-based microelectronic devices. Polysilicon can reach 99.9999% purity. Ultra-pure polysilicon is also used in the semiconductor industry, such as polysilicon rods with a length of 2 to 3 meters. In the microelectronics industry, polysilicon wafer has applications on both the macro-scale and micro-scale.
4. Polycrystalline Silicon Wafer Application
In the utilization of solar energy, monocrystalline silicon and polycrystalline silicon wafer structure also play a huge role. It is necessary to improve the photoelectric conversion efficiency of solar cells and reduce polycrcystalline silicon wafer price so that it will accepted by consumers. From the development process of international solar cells, it can be seen that its development trend is monocrystalline silicon, polycrystalline silicon, ribbon silicon, and thin film materials (including microcrystalline silicon-based films, compound-based films and dye films).
After obtaining high-purity polycrystalline silicon, it must be smelted in a single crystal furnace to form monocrystalline silicon, which is then sliced for use in integrated circuit manufacturing. It can be used in the production and deep processing of diode-level, rectifier device-level, circuit-level and solar cell-level monocrystalline products. Polycrystalline silicon production will occupy an important position in military electronic equipment.