Patent ID: 6306764
Filing Date: 2001-10-23
Classification: H01L,Y10S

Abstract:
A heat-treating method of accommodating, in a process vessel, a holder which holds a plurality of target substrates apart from each other, and subjecting the target substrates to heat treatment at once while flowing a process gas in said process vessel in a direction along which the target substrates are arranged, comprising:setting the target substrates and dummy substrates to be stacked on an upstream side of a flow of the process gas, in the heat treatment, within main holding positions of said holder where the target substrates are to be set, the dummy substrates being set more downstream of the process gas than the target substrates, the target substrates and the dummy substrates being set in said holder in a total number smaller than a total number of the main holding positions corresponding to a maximum number of wafers that can be held by said holder, and thus said holder being in a partially loaded state; andtransferring into said process vessel said holder in the partially loaded state, and subjecting the target substrates to the heat treatment in said process vessel.