Patent ID: 7470637
Filing Date: 2008-12-30
Classification: C23C,H01L

Abstract:
1. A computer readable medium containing program instructions for execution on a processor, which, when executed by the processor, cause a vertical film formation apparatus for a semiconductor process to execute: forming by CVD a silicon nitride film on target substrates stacked at intervals on a holder within a reaction chamber of the vertical film formation apparatus, while supplying a first film formation gas containing silicon and a second film formation gas containing nitrogen into the reaction chamber, wherein an inner surface of the reaction chamber consists essentially of quartz, and a by-product film containing silicon nitride as a main component is deposited on the inner surface of the reaction chamber by the CVD; then, unloading the holder along with the target substrates from the reaction chamber; then, removing by a cleaning gas the by-product film on the inner surface of the reaction chamber, while supplying the cleaning gas into the reaction chamber, and setting an interior of the reaction chamber at a first temperature and a first pressure to activate the cleaning gas, wherein the cleaning gas contains fluorine and hydrogen fluoride; and then, chemically planarizing the inner surface of the reaction chamber by a planarizing gas, while supplying the planarizing gas into the reaction chamber, and setting the interior of the reaction chamber at a second temperature and a second pressure to activate the planarizing gas, wherein the planarizing gas contains fluorine and hydrogen fluoride, and the second temperature is within a range of from 400 to 600° C. and is higher than the first temperature.