Patent ID: 8241426
Filing Date: 2012-08-14
Classification: C11D,H01L

Abstract:
1. A method of CMP polishing an object in which a hydrophobized porous substance is used as an interlayer insulating film material of a semiconductor integrated circuit formed on a substrate, said method comprising the steps of performing CMP polishing of the object to remove wiring materials and barrier metals; removing slurry and polishing residue remaining on the surface of the substrate by cleaning with a cleaning liquid containing a surfactant; washing the surface of the substrate with an organic solvent or a solution containing an organic solvent to remove organic matter which is in the cleaning liquid and has seeped into the interlayer insulating film in the removing step; and performing heat treatment of the object in which the substrate is heated to a temperature that is equal to or greater than the thermal decomposition temperature of the organic matter which has seeped into the interlayer insulating film to decompose the organic matter.