Patent ID: 7901206
Filing Date: 2011-03-08
Classification: H01L

Abstract:
1. A heat-treating apparatus comprising: a reaction tube for treating a substrate; a manifold for supporting the reaction tube, the reaction tube and the manifold contacting each other at a contact portion along continuous flat surfaces of the reaction tube and the manifold; a heater surrounding the reaction tube to heat an interior of the reaction tube; a cover that is in contact with both the reaction tube and the manifold so as to cover the contact portion between the reaction tube and the manifold from an outer side, the cover including a gas feed port communicating with a space formed by the cover, the reaction tube and the manifold; an inert gas feed source for feeding an inert gas into the space from the gas feed port; and a controller configured to execute a control so that a pressure in the space becomes more positive than a pressure in an interior of the reaction tube and a pressure in the exterior of the reaction tube by feeding the inert gas into the space.