Patent ID: 8460048

Claim:
A method for manufacturing a plasma display panel in which an electrical discharge gas is introduced into a space between a first substrate and a second substrate which are sealed together, the method comprising: a first deaeration step of releasing impurity gases from a protective film by heating the first substrate, on which the protective film is formed for withstanding plasma electrical discharge, to 280° C. or more in a vacuum or in a controlled atmosphere in a sealing chamber; and a sealing step of sealing the first substrate and the second substrate together in the sealing chamber by placing the first substrate and the second substrate in contact with each other and heating the first substrate and the second substrate in the sealing chamber subsequently after the heating in the first deaeration step, wherein in the first deaeration step, when the first substrate and the second substrate are positioned facing each other, a carrier gas is introduced between the first substrate and the second substrate such that a mean free path of the impurity gases released from either the first substrate or the second substrate is shorter than the gap between the first substrate and the second substrate, and the carrier gas is the same type of gas as the electrical discharge gas.