Patent ID: 7176105

Claim:
A method of depositing a fill layer in a recess, comprising: disposing in a substrate processing chamber a substrate having a recess; forming a first insulating layer within the recess; depositing a silicon containing layer on the substrate; removing an upper portion of the silicon containing layer while maintaining a portion of the silicon containing layer within the recess; selectively depositing a second insulating layer within the recess, wherein the deposition of the second insulating layer comprises, introducing a precursor into the substrate processing chamber; flowing ozone into the substrate processing chamber to react with the precursor to deposit the second insulating layer; and adjusting the ratio of ozone:precursor to regulate deposition of the second insulating layer within the recess; etching the second insulating layer; and depositing a third insulating layer on the substrate and over the second insulating layer to form a capping layer.