Patent ID: 7981240
Filing Date: 2011-07-19
Classification: B23K,H01J,Y10T

Abstract:
1. A method for making a vacuum airtight container comprising the steps of: (a) disposing a metal-bonding material on a bonding surface of at least one of a first member and a second member constituting the vacuum airtight container; (b) bringing the first member and the second member into contact with each other with the metal-bonding material therebetween and holding the first member and the second member in a bonding position; (c) moving at least one of the first member and the second member held in the bonding position relative to the other so as to extend the distance between the first member and the second member; (d) heating the metal-bonding material above a temperature at which the metal-bonding material melts; (e) bringing the first member and the second member into contact with each other with the heated metal-bonding material therebetween, moving at least one of the first member and the second member in a direction parallel to the bonding surface while keeping the first member and the second member in contact with each other so as to break a surface oxide film of the bonding material formed during step (d), and thereby returning the first member and the second member to the bonding position while pressing the metal-bonding material; and (f) bonding the first member and the second member returned to the bonding position by cooling and solidifying the metal-bonding material, wherein the steps (c), (d), (e), and (f) are performed under a vacuum atmosphere.