Patent ID: 9726978
Date: 2017-08-08
CPC Classifications: C09K,C11D,G03F,H01L

Claim:
1. A cleaning process comprising: a preparation step of preparing a cleaning composition comprising (component a) water; (component b) a hydroxylamine and/or a salt thereof; (component c) a basic organic compound; and (component d) an organic acid; and the composition has a pH of 7 to 9; and a cleaning step of cleaning, by means of the cleaning composition, plasma etching residue and/or ashing residue formed above a semiconductor substrate, wherein component a is contained at 50 to 99.5 wt % relative to the total weight of the cleaning composition, wherein component b is at least one compound selected from the group consisting of hydroxylamine sulfate, hydroxylamine hydrochloride, hydroxylamine nitrate, and hydroxylamine phosphate, wherein component c is at least one compound selected from the group consisting of an alkanolamine and an organic amine having no hydroxy group, and wherein the semiconductor substrate comprises aluminum and titanium nitride.