| abstract |
An object is to provide a deposition apparatus for forming a thin film which contains few impurities such as a hydrogen atom or a carbon atom. Further, an object is to provide a method for forming a thin film containing few impurities. Furthermore, an object is to provide a method for manufacturing a highly reliable semiconductor element including an oxide semiconductor film containing few impurities. A deposition apparatus can be provided for forming a thin film which contains few impurities such as a compound containing a hydrogen atom such as H 2 O, a compound containing a carbon atom, a hydrogen atom, or a carbon atom can be provided. Further, a method for forming a thin film containing few impurities can be provided. Furthermore, a method for forming a highly reliable semiconductor element including an oxide semiconductor film containing few impurities can be provided. |