Novel conveying roller used for silicon wafer chained texturing

Abstract

The invention discloses a novel conveying roller used for silicon wafer chained texturing. A gear or gears is / are arranged at one end or the two ends of the conveying roller and meshed with a transmission chain or a transmission belt of a chained texturing groove, the conveying roller is of a columnar structure or a cylindrical structure, and protrusions are arranged on the surface of the columnar structure or the cylindrical structure and are distributed on the surface of the columnar structure or the cylindrical structure in a prismatic shape, a rectangular shape and a honeycombed shape or distributed on the surface of the columnar structure or the cylindrical structure at will. According to the novel conveying roller, as the protrusions are arranged on the surface of the roller, the time for the same portions of a silicon wafer to be in contact with the protrusions is quite short, all the portions of the silicon wafer can be effectively in contact with corrosive liquid, and the roller printing problem is accordingly solved; in addition, bubbles generated when the silicon wafer is reacted with the corrosion liquid are pressed by the protrusions, and the large bubbles are broken up into the small bubbles; meanwhile, the bubbles are pressed to move among the protrusions distributed at will, parts of the bubbles are discharged out from the bottom of the silicon wafer, the problem of uneven corrosion, caused by bubble accumulating, of the bottom of the silicon wafer is effectively solved, and the textured surface is more even.

Description

technical field [0001] The invention relates to the technical field of silicon wafer texturing equipment, in particular to a novel transmission roller used for silicon wafer chain texturing. Background technique [0002] Texturing is an important step in the manufacture of crystalline silicon solar cells. Texturing can make the surface of the silicon wafer form an uneven microstructure. When the sunlight shines on the silicon wafer, the undulating texture makes the light reflect and refract many times, making More sunlight is incident into the silicon wafer to improve the conversion efficiency of the cell. The method of texturizing the silicon wafer is to react with the etching solution and the silicon wafer. After the reaction, a worm-like or pyramid-like texture is obtained. [0003] Chain texturing is a commonly used texturing method for silicon wafers at present. During chain texturing, silicon wafers are immersed in corrosive liquid and advance under the support an...

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Problems solved by technology

Similar to Comparative Document 2, in this solution, the air bubbles will still be squeezed out by the rollers and gather at the back of the silicon wafer, resulting in uneven suede

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