Patent ID: 6815332
Filing Date: 2004-11-09
Classification: C23C,H01L,Y10S

Abstract:
A method of forming on a substrate a laminated structure including a layer-to-be-etched and an etch-stop layer, comprising the steps of:introducing into a reactor a reaction gas comprised of a source gas containing silicon and carbon at a source gas flow rate and an inert gas at an inert gas flow rate which is 40% or higher of the source gas flow rate, said source gas being Si&agr;O&agr;âˆ’1R2&agr;âˆ’&bgr;+2(OCnH2n+1)&bgr; wherein &agr; is an integer of 1-3, &bgr; is an integer of 1-3, n is an integer of 1-3, and R is C1-6 hydrocarbon attached to Si; applying plasma energy to a space where the reaction gas is present above a substrate mounted on a heated substrate-supporting member; forming an etch-stop layer on the substrate from the reaction gas with plasma energy; and forming a laminated structure by forming at least one layer-to-be-etched on the substrate using a reaction gas composed of the same constituent gases as the reaction gas for the etch-stop layer but having a lower flow rate of the inert gas.