Manufacturing method of image display apparatus, and bonding method of base material

A manufacturing method of an image display apparatus which comprises a first substrate having numerous electron-emitting devices, a second substrate positioned opposite to the first substrate and having a fluorescent film of displaying an image in response to irradiation of electrons emitted from the electron-emitting devices, and a frame member positioned between the first substrate and the second substrate to form a space between the first substrate and the second substrate, the method comprising:

• arranging a bonding material between a pair of base materials acting as the first substrate and the frame member or acting as the second substrate and the frame member, wherein the bonding material includes a main portion extending along one of the base materials acting as the frame member in a closed shape, and an additional portion, thinner than the main portion, branching from the main portion as an elongation of a side constituting the main portion;
• and
• bonding, as mutually pressing to each other the base materials of the pair of the base materials, the pair of the base materials by the bonding material, by irradiating an electromagnetic wave to the main portion of the bonding material while moving an irradiation position along the bonding material to melt the main portion of the bonding material, and then hardening the melted main portion of the bonding material.