Patent ID: 7125304

Claim:
A method of manufacturing a plasma display panel (PDP) for heating a substrate while conveying the substrate, the method comprising: a heating step for heating the substrate to a first temperature T 1 (° C) with a first temperature gradient; a transition step for heating the substrate from the first temperature T 1 (° C) with a second temperature gradient that is smaller than the first temperature gradient; and a temperature keeping step for keeping temperature for a predetermined period at a second temperature T 2 (° C) higher than the first temperature T 1 (° C.), and wherein the first temperature T 1 (° C) and the second temperature T 2 (° C) have the following relation 0.9×T 2 ≦T 1 <T 2 , and a condition of heating is controlled in a such manner that the second temperature gradient at the transition step is zero.