Patent ID: 6750146
Filing Date: 2004-06-15
Classification: H01L

Abstract:
A method for forming a barrier layer applied in a via opening, comprising:providing a substrate having a component layer formed thereon, wherein the component layer has at least a metallic layer formed within; forming a patterned interlayer on the component layer, wherein the patterned interlayer has at least an opening that exposes a portion of the metallic layer; forming a metal layer conformal to a profile of the opening; performing a first gas-stable step for adjusting pressure, wherein a hydrogen gas, a helium gas, a reactive source and a carrier gas are provided in the first gas-stable step; depositing a first titanium nitride layer on the metal layer by using the reactive source and the carrier gas, after performing the first gas-stable step; performing a first plasma treatment process to remove a portion of the first titanium nitride layer; performing a second gas-stable step for adjusting pressure, wherein the hydrogen gas, the helium gas, the reactive source and the carrier gas are provided in the second gas-stable step; depositing a second titanium nitride layer on the remained first titanium nitride layer by using the reactive source and the carrier gas, after performing the second gas-stable step; and performing a second plasma treatment process to remove a portion of the second titanium nitride layer.