Patent ID: 8900472

Claim:
A liquid texturing and cleaning agent for the surface treatment of monocrystalline wafers comprising at least one alkaline etching agent for monocrystalline silicon and at least one low-volatile organic compound with a boiling temperature of more than 110° C., wherein the texturing and cleaning agent comprises a viscosity in the range of 0.5 to 100 mPa·s and wherein the low-volatile organic compound is selected from the group consisting of a) ethylenediaminetetraacetic acid (EDTA), 1,2-cyclohexanediaminetetraacetic acid (CDTA), and salts thereof; b) polysorbate, polyethylenesorbitan-monolaurate; c) possibly substituted aromatic sulphonic acid and possibly substituted aromatic dialcohol; d) (poly)alcohol selected from the group of straight-chain, branched or cyclic C 4 -C 8 diols, straight-chain, branched or cyclic C 6 -C 12 triols; and mixtures thereof.