Patent ID: 7033843

Claim:
A semiconductor manufacturing method which performs reactive gas processing, wherein, when a substrate carrying system inserts a substrate from an airtight space in the substrate carrying system into a reaction chamber, and when the substrate is ejected from the reaction chamber to the airtight space, a reactive gas is fed into the reaction chamber and reacts therein, the method comprising: a substrate carrying step of measuring the moisture content in the airtight space by a first moisture measuring device connected to the airtight space; inserting the substrate from the airtight space in the substrate carrying system into the reaction chamber, or ejecting the substrate from the reaction chamber into the airtight space in the substrate carrying system; and a gas processing step of performing a reactive-gas-process while measuring the moisture content in the reaction chamber by second moisture measuring device connected to the reaction chamber, after the substrate carrying step, wherein in the substrate carrying step, after it has been confirmed that the moisture content in the airtight space is lower than a first default value, the substrate is inserted from the airtight space into the reaction chamber, and the substrate is ejected from the reaction chamber to the airtight space; and in the gas processing step, the reactive-gas-process starts after it has been confirmed that the moisture content in the reaction chamber is lower than a second default value.