Patent ID: 8679369
Filing Date: 2014-03-25
Classification: C23C,H01L

Abstract:
1. A film forming method for evaporating a film-forming material in evaporation means and transporting said evaporated film-forming material to the vicinity of a substrate by a carrier gas, thereby forming a film on said substrate, the film-forming material having undefined parameters, said film forming method comprising: selecting, as the undefined parameters of the film-forming material, activation energy Ea and a constant Ko concerned with an evaporation rate V; determining the activation energy Ea of the film-forming material from a relationship between a concentration and a temperature, where Ea is expressed by eV; determining the constant Ko of the film-forming material by measuring a concentration of the film-forming material at a temperature with a pressure kept constant where Ko is expressed by %·Torr; determining values of two of P, T, and V, given that a pressure on said substrate is P, an absolute temperature for evaporating said film-forming material is T, and a concentration of said film-forming material in said carrier gas is V; and controlling a remaining one of P, T, and V in accordance with a formula concerned with the evaporation rate V: wherein the film of the film-forming material is formed on the substrate in accordance with the determined and controlled P, T, and V.