Patent ID: 8187981
Filing Date: 2012-05-29
Classification: G03F,H01L

Abstract:
1. A substrate processing method, comprising: preparing a substrate having a low-k interlayer dielectric film as a to-be-etched film and a photoresist film, formed on the low-k interlayer insulating film, serving as an etching mask with a predetermined circuit pattern; etching the low-k interlayer insulating film through the photoresist film to form grooves and/or holes in the low-k interlayer insulating film; ashing the photoresist film by using hydrogen radicals generated by bringing a hydrogen gas into contact with a catalyst of a high temperature, wherein the low-k interlayer insulating film is damaged by the ashing; and recovering damage to the low-k interlayer insulating film due to the ashing by supplying a specific recovery gas, wherein the low-k interlayer insulating film has a methyl group (—CH3) containing Si, and wherein the damage is portions where the methyl group constituting the low-k interlayer insulating film is removed during the ashing.