Patent ID: 8951950
Filing Date: 2015-02-10
Classification: C11D,H01L

Abstract:
1. A semiconductor cleaning composition comprising: (a) from 50 wt % to about 90 wt % of one or more water miscible organic solvents selected from the groups consisting of tetrahydrofurfuryl alcohol, glycol ethers, diglycol ethers, dipropylene glycol, alkyl diols, aliphatic alcohols, glycerine, N-methyl-2-pyrrolidinone, sulfolane and dimethyl sulfoxide; (b) from 0.1 wt % to 1.0 wt % of one or more fluoride compounds selected from the group consisting of ammonium fluoride, ammonium bifluoride, and tetra alkyl ammonium fluoride; (c) from 1 wt % to about 5 wt % of one or more chelating agents selected from organic acids, phosphonic acids, iminodiacetic acid, sulfonic acids and amines; and (d) from 50 ppm to 20000 ppm of an alkanoic acid of the formula R—COOH, where R can be a linear or branched alkyl group in the form of C