Patent ID: 7985297

Claim:
A method for cleaning a quartz part of an apparatus for manufacturing a semiconductor device, comprising: providing a cleaning solution to a quartz part including a residual thin film and impurities, the cleaning solution comprising from about 5 to about 35 wt % of an ammonium compound, wherein the ammonium compound comprises at least one selected from the group consisting of ammonium hydroxide, methyl ammonium hydroxide, ethyl ammonium hydroxide, ammonium chloride (NH 4 Cl), ammonium bromide (NH 4 Br) and ammonium carbonate ((NH 4 ) 2 CO 3 ), from about 7 to about 55 wt % of an acidic oxidizing agent, from about 5 to about 30 wt % of a fluorine compound and a remaining amount of water; and implementing a cleaning process to remove the residual thin film and the impurities from a surface of the quartz part using the cleaning solution.