Manufacturing method of hermetically sealed container

A manufacturing method of a hermetic container having first and second dielectric substrates comprising:

• a step of providing a first electrode and a second electrode operating also as a bonding material and divided into a plurality of segments for simultaneously applying thereto potentials different from each other on the other of the first and second substrates, to form a gap between the first and second electrodes, on one of the first and second substrates, while providing;
• a step of arranging the first and second substrates, so that the first and second electrodes are opposed to the second substrate;
• and
• a first bonding step of heating the first electrode while pressing the first and second substrates to each other to bond the first and second substrates together, wherein
• the first bonding step includes steps of:
• pressing the first and second substrates to each other by an electrostatic force generated between the first and second electrodes by applying a potential difference between the first and second electrodes;
• softening and melting the first electrode, and then cooling and solidifying the first electrode, by simultaneously forming a locally-heated spot in the bonding material and moving the locally-heated spot relatively against the bonding material;
• and
• increasing the potential difference between the first electrode and the segment of the second electrode at which the locally-heated spot is positioned correspondingly to the moving of the locally-heated spot.