Patent ID: 8002602

Claim:
A manufacturing method of a vacuum airtight container, the method comprising: a sealant applying step of applying a sealing material to a container; a baking step of baking, in a vacuum atmosphere, the container in which a first non-evaporable getter and a second non-evaporable getter having an activation temperature higher than that of the first non-evaporable getter are disposed; and a sealing step of, after the baking step, sealing the container with the sealing material to provide an airtight container, wherein the baking step comprises steps of: baking the entire container by increasing the temperature of the container up to a temperature T 1 and holding the temperature T 1 for a period of time, with temperature T 1 being equal to or higher than the activation temperature of the first non-evaporable getter and lower than the activation temperature of the second non-evaporable getter; after holding the temperature T 1 , baking the entire container by increasing the temperature of the container up to a temperature T 2 , which is higher than the activation temperature of the second non-evaporable getter and a melting point of the sealing material; and decreasing the temperature of the container from the temperature T 2 to a temperature which is lower than the melting point of the sealing material.