Patent ID: 6770573
Filing Date: 2004-08-03
Classification: C23C,H01L

Abstract:
A method for fabricating a thermally stable ultralow dielectric constant film comprising the steps of:providing a plasma enhanced chemical vapor deposition (PECVD) reactor; positioning a substrate in said PECVD reactor; flowing a first precursor gas comprising cyclic siloxane molecules into said PECVD reactor; flowing at least a second precursor gas comprising organic molecules with ring structures having C, H and O atoms into said PECVD reactor;and depositing a film comprising Si, C, O and H and a multiplicity of nanometer-sized pores on said substrate in presence of CO2 or CO2 and O2, wherein said depositing comprises the step of setting a RF power density at between about 0.05 W/Cm2 and about 4.0 W/cm2.