Acid corrosion solution for preparing polysilicon suede and the applied method of it
AssigneeWuxi Suntech Power Co., Ltd.
InventorsJingjia Ji, Yusen Qin, Zhengrong Shi
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Abstract
An acid corrosion solution for preparing polysilicon suede is obtained by mixing with an oxidant and a hydrogen fluoride. The oxidant is a nitrate or nitrite. The method applied of the solution includes putting the polysilicon cut pieces into the acid corrosion solution to carry out the corrosion reaction. The reaction time is about 30 seconds to 20 minutes and the temperature of acid corrosion solution is −10° C. to 25° C.
Claims7
An acid corrosion solution for preparing polysilicon texture, comprising the mixed oxidant and hydrofluoric acid solution, wherein the oxidant is nitrate or nitrite, wherein the oxidant has a concentration of 0.1 to 10 mol/L and the hydrofluoric acid solution has a concentration of 10 to 25 mol/L.
The method for preparing polysilicon texture according to 5, wherein the reaction temperature is 0° C. to 15° C.
Dependencies are inferred from the claim text.