Silicon block cutting device and method for removing mortar impurities

Abstract

The invention provides a silicon block cutting device and a method for removing mortar impurities. The silicon block cutting device for removing the mortar impurities comprises a base, a cutting mechanism and a mortar spraying nozzle, wherein the base comprises a plurality of hollow metal pipelines which are in parallel, magnets capable of being inserted and pulled are arranged inside the metal pipelines, the cutting mechanism comprises a cutting body and cutting net lines, the cutting net lines are arranged on the base and used for cutting silicon blocks, the cutting net lines correspond to the metal pipelines, and the mortar spraying nozzle is fixed relative to the cutting body and sprays silicon cutting mortar to the cutting lines. The metal impurities of the motor on the cutting net lines are adsorbed on the metal pipelines driven by the magnetic force of the magnets, so that the performance of the mortar is improved, the using rate of the mortar is improved, and the silicon cutting cost is lowered; the line mark ratio after silicon block cutting is lowered, and the production yield and the quality of the silicon block cutting are improved.

Description

technical field [0001] The invention relates to the field of silicon block processing technology, in particular to a silicon block cutting device and method for removing impurities from mortar. Background technique [0002] In recent years, with the rapid development of the photovoltaic industry, the silicon wafer industry has increasingly strict requirements on the quality and appearance of silicon wafer products. , and customers complain more about the fragmentation rate of silicon wafers. At present, the cutting method of silicon block mainly adopts multi-wire cutting, and the cutting steel wire is used to carry the mortar mixed with cutting fluid and Sic to cut the silicon block, and the mortar after cutting is usually recovered and recycled. However, the currently used mortar is mixed with metal impurities, that is, during the online cutting process of cutting fluid and silicon carbide micropowder used in China, impurities such as silicon powder, iron, and high polymer...

AI Technical Summary

Problems solved by technology

However, the currently used mortar is mixed with metal impurities, that is, during the online cutting process of cutting fluid and silicon carbide micropowder used in China, impurities such as silicon powder, iron, and high polymers will inevitably be mixed in the mortar, resulting in the pH of the silicon cutting mortar. And the viscosity is too high, silicon carbide particles are easy to agglomerate, resulting in serious line marks after cutting the silicon block when the mortar is used for the second time, resulting in a low recycling rate of the mortar and making the cost of cutting the silicon block higher

Images