Patent ID: 8211232

Claim:
A substrate processing apparatus comprising: a processing vessel adapted to accommodate a substrate, the processing vessel having a sidewall; and an upper lid adapted to engage said processing vessel so as to define a processing chamber for the substrate, wherein said upper lid includes a gas supplying portion adapted to supply a process gas into the processing chamber, a gas introduction hole is formed in said upper lid, one end of the gas introduction hole being connected to the gas supplying portion to introduce the process gas into the gas supplying portion, a gas introduction tube is attached to an outer edge of the sidewall of said processing vessel, one end of the gas introduction tube being connected to a source of the process gas to introduce the process gas from the source, when said upper lid engages said processing vessel, the other end of the gas introduction hole is joined with the other end of the gas introduction tube, and said gas introduction tube is provided such that said gas introduction tube is removable from said processing vessel.