Patent ID: 6025263
Filing Date: 2000-02-15
Classification: H01L,Y10S

Abstract:
A method of interlayer dielectric planarization comprising the steps of:(a) defining at least one metal line pattern onto a semiconductor substrate,(b) forming a dielectric underlayer of silicon dioxide (SiO.sub.2) with constant refraction index onto the entire substrate by plasma enhanced chemical vapor deposition employing SiH.sub.4, as a reactant gas (PE-SiH.sub.4), wherein said refraction index of said dielectric underlayer is in the range from 1.48 to 1.6; and(c) forming an interlayer dielectric onto said dielectric underlayer, wherein said interlayer dielectric is SiO.sub.2 formed by employing ozone and TEOS as reactants (O.sub.3 -TEOS);whereby surface sensitivity of said interlayer dielectric to said dielectric underlayer is eliminated.