Cost-effective pre-texturing treatment  

DW PreTex can be integrated into the existing production as a modular wet process system without additional requirements, both for wafer and cell manufacturers. DW PreTex uses common materials used in the PV industry. The process achieves extremely uniform surfaces with reflection values down to 21 %. The in-line process developed by SCHMID provides enormous savings for the PV industry. DW PreTex requires only one process step to allow the processing of diamond-wire cut multi-wafers with the proven standard texture HF/HNO3. Due to the pre-treatment by DW PreTex, the diamond-wire cut wafers have more uniform surfaces than slurry-cut wafers. Thus further increases in cell efficiency are possible. DW PreTex is available in two versions: as a separate single unit that roughens the surface of the wafers and then uses the available texture capacity, or as a combined line for complete texturing. Due to the modular design, the in-line process can be designed for serial production of up to 4,500 wafers per hour.

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