Patent ID: 7491658
Filing Date: 2009-02-17
Classification: C23C,H01L,Y10T

Abstract:
1. A method of forming a dielectric film comprising: positioning a substrate in a plasma enhanced chemical vapor deposition (PECVD) reactor; providing a single organosilicon precursor with a built-in organic porogen into said PECVD reactor in the absence of another porogen source, said single organosilicon precursor with a built-in organic porogen is selected from the group consisting of vinylmethyldiethoxysilane, vinyltriethoxysilane, vinyldimethylethoxysilane, hexavinyldisiloxane, trivinylmethoxysilane, trivinylethoxysilane, vinylmethylethoxysilane, vinylmethyldiethoxysilane, vinylmethyldimethoxysilane, vinylpentamethyldisiloxane, vinyltetramethyldisiloxane, and vinyltrimethoxysilane; forming an as-deposited film from said single organsilicon precursor on said substrate, said as-deposited film comprising a SiCOH matrix component and an organic porogen component; and performing a treatment step that substantially removes said organic porogen component from said as-deposited film, said treatment step conducted in the presence of an atmosphere selected from the group consisting of an inert gas and a hydrogen source and an inert gas, oxygen and water, thereby providing a porous SiCOH dielectric material having a dielectric constant of about 2.7 or lower, said SiCOH dielectric material having a covalently bonded tri-dimensional network structure, a controlled porosity having molecular scale voids of between about 0.5 to about 20 nanometers in diameter, said molecular scale voids occupying a volume of between about 5% and about 60%, a crack velocity in water on the order of less than 10