Patent ID: 9379279
Filing Date: 2016-06-28
CPC Classification: C23C,C30B,H01L

Claim Text:
1. An epitaxial film forming method of forming an epitaxial film on a substrate by using a sputtering method comprising: placing the substrate in a vessel in which at least one of a target with a wurtzite structure and a target for forming a film with a wurtzite structure by deposition; applying high-frequency power to a target electrode to which the target is attached, and applying high-frequency bias power to a substrate holder supporting the substrate in such a manner as to suppress frequency interference between the applied high-frequency power and the applied high-frequency bias power; and forming the epitaxial film on the substrate by sputtering the target with plasma generated by the high-frequency power, wherein the forming the epitaxial film includes causing the target to give off a molecule of the target by applying the high-frequency power to the target electrode while generating an electric field that orients a polarization from a negative charge to a positive charge of the molecule toward the substrate supported by the substrate holder by applying the high-frequency bias power to the substrate holder.