Manufacturing method of hermetically sealed container for holding therein atmosphere of reduced pressure

A manufacturing method of an evacuated hermetically sealed container comprising a pair of glass substrates opposing to each other, and a frame member arranged between the pair of substrates to define together with the pair of substrates the atmosphere of reduced pressure inside thereof, wherein the manufacturing method comprising steps of:

• arranging, between the frame member and one of the pair of substrates, a joining member having a viscosity of negative temperature coefficient, having a softening temperature lower than those of the one of the pair of substrates and the frame member, and extending into a frame shape, so that the joining member contacts the one of the pair of substrates and contacts the frame member so as to form an assembly unit having an inner space being surrounded with the frame member and the pair of substrates;
• and
• heating and melting the joining member, while pressing the joining member, wherein a center of an incoming heat flux distribution in a direction of a width of the joining member is positioned more closely to the inner space of the assembly unit than a center of the width of the joining member.