Patent ID: 6194365
Filing Date: 2001-02-27
Classification: C03C,C09K,C23F,C23G,H01L

Abstract:
A composition for chemical cleaning and/or etching SiO.sub.2 in the manufacturing process of electronic displays, quartz devices, and/or semiconductor wafers, which comprises:a) 0.1-50 wt % of fluoride(s), based on the total composition weight, said fluoride being reacted with the SiO.sub.2 to form fluorosilicate and having a lower etching ability than HF;b) 0.8-40 wt % of persulfate(s), based on the total composition weight, wherein said persulfate(s) gradually decomposes in an aqueous solution to provide H.sub.2 O.sub.2 which prevents the fluorosilicate and the SiO.sub.2 in a colloidal state from adhering to a surface of the electronic displays quartz devices and/or semiconductor wafers;andc) at least one of isopropyl alcohol and/or at least one inhibitor,wherein the at least one inhibitor is selected from amine(s) and amide(s).