Patent ID: 6455445
Filing Date: 2002-09-24
Classification: B05D,C09D,C23C,H01L,Y10S

Abstract:
A method for forming a siloxan polymer insulation film on a semiconductor substrate by plasma treatment, comprising the steps of:vaporizing a silicon-containing hydrocarbon compound to produce a material gas for silicone polymer, said silicon-containing hydrocarbon having the formula Si&agr;O&agr;âˆ’1R2&agr;âˆ’&bgr;+2(OCnH2n+1)&bgr; wherein &agr; is an integer of 1-3, &bgr; is 0, 1, or 2, n is an integer of 1-3, and R is C1-6 hydrocarbon attached to Si; introducing the material gas into a reaction chamber for plasma CVD processing wherein a semiconductor substrate is placed; introducing an additive gas comprising an inert gas and optionally an oxidizing gas, said oxidizing gas being used in an amount less than the material gas; and forming a siloxan polymer film having â€”SiR2Oâ€” repeating structural units on the semiconductor substrate by activating plasma polymerization reaction in the reaction chamber where a reaction gas composed of the material gas and the additive gas is present, while controlling the flow of the reaction gas to lengthen a residence time, Rt, of the reaction gas in the reaction chamber, wherein 100 msec&lE;Rt, Rt[s]=9.42Ã—107(PrÂ·Ts/PsÂ·Tr)rw2d/F wherein:Pr: reaction chamber pressure (Pa) Ps: standard atmospheric pressure (Pa) Tr: average temperature of the reaction gas (K) Ts: standard temperature (K) rw: radius of the silicon substrate (m) d: space between the silicon substrate and the upper electrode (m) F: total flow volume of the reaction gas (sccm).