Patent ID: 9487859
Filing Date: 2016-11-08
CPC Classification: C23C

Claim Text:
1. An operating method of a vertical heat treatment apparatus which performs a film forming process by keeping the interior of a vertical reaction tube surrounded by a heating mechanism at a vacuum atmosphere and by supplying film forming gases to substrates accommodated within the reaction tube, comprising: performing a film forming process with respect to the substrates by carrying a substrate holder holding a plurality of substrates in a shelf form into the reaction tube; carrying out the substrate holder from the reaction tube; and carrying a cooling jig into the reaction tube to cool an inner wall of the reaction tube so as to peel a thin film adhering to the inner wall of the reaction tube by a thermal stress and so as to collect the thin film in the cooling jig by thermophoresis, wherein processed substrates held in the substrate holder are interchanged with unprocessed substrates while the cooling jig is positioned within the reaction tube.