Patent ID: 9050623
Filing Date: 2015-06-09
Classification: B05D,H01L

Abstract:
1. A method of UV curing a dielectric film on a substrate, the method comprising: (a) exposing the dielectric film on the substrate to first UV radiation having a first wavelength or first wavelength range, said first wavelength or first wavelength range including only wavelengths longer than about 220 nm, until porogens in the dielectric film are removed, thus reducing a dielectric constant of the dielectric film, and then further exposing the dielectric film to the first UV radiation after the porogens are removed to further reduce the dielectric constant of the dielectric film; and (b) after (a) exposing the dielectric film to second UV radiation having a second wavelength or second wavelength range, said second wavelength or second wavelength range including only wavelengths of 185 nm or longer, until a desired film material property is reached, wherein the second wavelength or lowest wavelength of the second wavelength range is lower than the first wavelength or lowest wavelength of the first wavelength range.