| 摘要 |
In some embodiments, a method for integrated circuit fabrication includes removing oxide material from a surface of a substrate, where the surface includes silicon and germanium. Removing the oxide material includes depositing a halogen-containing pre-clean material on a silicon oxide-containing surface and sublimating a portion of the halogen-containing pre-clean material to expose the silicon on the surface. A passivation film is deposited on the exposed silicon. The passivation film can include chlorine. The passivation film can prevent contamination of the silicon surface by chemical species from the later sublimation, which can be at a higher temperature than the earlier sublimation. Subsequently, a remaining portion of the halogen-containing pre-clean material and the passivation film are sublimated. A target material, such as a conductive material, can subsequently be deposited on the substrate surface. |
