2012 solar winter so that everyone could feel the skin graft with bone pain, component color is still plaguing PV right through you like a Python, this multi crystalline cells below in the texturing process color film analysis, and presenting a solution.

Cell color effect of main subject velvet flowers, red and part of the yin and Yang of films.

Red is mainly as a result of texturing low corrosion. If texturing corrosion of less than 3, wafer damage that would remove completely, and cause overall red color after PE coating.

The so-called flower, is caused due to the high corrosion etching, under normal circumstances, texture etching above 4.5, the wafer is equivalent to polished, coated shiny cell after grain more obvious.

This corrosion of two kinds of phenomenon from the control down to start, make process adjustment, HNO3 and HF ratio tends to be ideal, achieve better textured effect. Secondly, strengthen supervision, before production stopped when corrosion control shift and equipment monitoring. In the production process to technicians and quality control personnel several times checking weighing and suede texture effect, guarantee the stability corrosion and suede.

Yin and Yang can be divided into the following two cases, one is leaching, corrosion between distortions in the second.

Extract problems arise during the production process, under the influence of level of front and rear wheels and the front bezel, wafer into the texture slot, liquid contact silicon there is a time gap. That wafer contact solution is bound to be higher than the amount of corrosion exposure solution area. Difference of corrosion leads Silicon surface textured effect, PE coating produces a color difference. In order to ensure the effect of leaching, required to adjust the texture slot wheel and bezel.

Adjustment method: first to re-adjust the bezel and remove the wheel, wheel leveling under and minimizing wheel if possible. Bezel increase rose to the height of the standard is to put Silicon in the bezel on a wheel in front, finger clicking wafer edge wafer tilt angle greater than 15 degrees on the other side, the use of such methods can continue to improve the baffle height. From actual results can guarantee the leaching effect of Silicon.

Adjusted wafer extracts uniform wafer etching effect can ensure consistent.

The road Zhijian corrosion volume has deviation, main is into liquid process led to, some old equipment has into liquid tube, but different pipeline of into liquid is a pipeline to, will caused within road of liquid at least, caused corrosion volume of deviation; some new equipment has separate of into liquid tube, is more hole of, is can guarantee separate sex, but into liquid most also is has problem, so this class equipment Shang increased limited flow device, guarantee into liquid volume basic keep consistent.

Effect of extracts can be guaranteed, all deviations are resolved, the etching caused by Yin and Yang will be completely resolved.