Patent ID: 7732308

Claim:
A process for depositing at least one semiconductor layer on at least one substrate in a process chamber, the semiconductor layer comprising a plurality of components, and the components being vaporized by means of discontinuous injection of a liquid starting material or a starting material dissolved in a liquid into a temperature-controlled vaporization chamber by means of, in each case, an associated injector unit, and the vapor being fed to the process chamber by means of a carrier gas, characterized in that mass flow parameters which determine a time profile of a mass flow of a first starting material, which contains silicon, and a second starting material, which contains germanium, through the associated injector unit, said parameters including a preliminary injection pressure, an injection frequency and a-pulse/pause ratio, as well as a phase relationship of pulses/pauses with respect to pulses/pauses of other injector unit(s), are individually set or varied.