Patent ID: 7344603
Filing Date: 2008-03-18
Classification: C08J,H01L

Abstract:
1. A method of removing, dissolving, rinsing or peeling polysilazane coated on an edge or a back of a substrate, which comprises contacting a composition comprising a solvent, which is a single or mixed solvent comprising one or more members selected from the group consisting of xylene, anisole, decalin, cyclohexane, cyclohexene, methylcyclohexane, ethylcyclohexane, limonene, hexane, octane, nonane, decane, a C8-C11 alkane mixture, a C8-C11 aromatic hydrocarbon mixture, an aliphatic/alicyclic hydrocarbon mixture containing 5 to 25 wt. % C8 or more aromatic hydrocarbons, and dibutyl ether, wherein the number of 0.5 micron or more fine particles contained in 1 ml of the solvent is 50 or less, and wherein the solvent has a water content of 100 ppm or less and said composition further comprises mineral spirit as a diluent solvent, with polysilazane and removing, dissolving, rinsing or peeling the polysilazane coated on the edge or the back of the substrate by jetting the composition onto the polysilazane.