Patent ID: 6211040
Filing Date: 2001-04-03
Classification: H01L

Abstract:
A method to fill gaps with silicon dioxide in the manufacture of an integrated circuit device comprising:providing a semiconductor substrate;providing features overlying said semiconductor substrate wherein spaces between said features are termed gaps;depositing a silicon dioxide liner layer overlying said features and lining said gaps while leaving said gaps open, wherein said depositing is by HDP CVD using a gas mixture comprising silane, oxygen, and argon, wherein said depositing is at a chamber pressure of less than 2 milliTorr, and wherein a first sputter rf energy is applied;depositing a silicon dioxide gap filling layer overlying said silicon dioxide liner layer and filling said gaps, wherein said depositing is by HDP CVD using a gas mixture comprising silane, oxygen, and argon, wherein said depositing is at a chamber pressure of less than 2 milliTorr, and wherein a second sputter rf energy higher than said first sputter rf energy is applied; andcompleting said integrated circuit device.