Patent ID: 8979469
Filing Date: 2015-03-17
Classification: H01L,Y10S

Abstract:
1. A heat treatment apparatus, comprising: a vessel loading unit on which a substrate vessel is loaded, the substrate vessel being configured to accommodate a plurality of substrates at a first interval; a substrate holder configured to hold the plurality of substrates at a second interval, the second interval being smaller than the first interval; a substrate transfer unit having at least two substrate supporting parts capable of supporting the substrates and configured to transfer the plurality of substrates between the substrate holder and the substrate vessel, the at least two substrate supporting parts being stacked with the first interval therebetween and configured to be simultaneously advanced and retreated relative to the substrate vessel and individually advanced and retreated relative to the substrate holder; and a control unit, when the substrates are transferred from the substrate vessel to the substrate holder, configured to monitor whether a substrate is held by a lower substrate supporting part of the at least two substrate supporting parts to control an upper substrate supporting part of the at least two substrate supporting parts to be in an inoperative state when the substrate is held by the lower substrate supporting part, and to control that the lower substrate supporting part transfers a primary substrate supported thereon to the substrate holder and subsequently the upper substrate supporting part transfers a secondary substrate supported thereon to the substrate holder positioned below the primary substrate.