Patent ID: 8317563

Claim:
A manufacturing method for a plasma display panel that includes a front substrate and a back substrate, the front substrate having a MgO-containing protective layer on a main surface thereof, the manufacturing method comprising: a pre-baking step of pre-baking a paste containing a sealing material and a binder at a pre-baking temperature, a highest pre-baking temperature being set to be higher than or equal to a disappearance point of the binder and lower than a softening point of the sealing material, the paste having been applied along peripheral edges of one of the front and the back substrates; a positioning step of superposing, after the pre-baking step, one of the front and the back substrates on the other via the pre-baked paste so that the protective layer opposes a main surface of the back substrate with a gap therebetween; a sealing step of sealing, after the positioning step, the substrates together along the peripheral edges thereof to enclose an inner space between the substrates, by baking the substrates in a mixed gas atmosphere consisting essentially of a non-oxidizing gas and a reducing gas; and an evacuating step of evacuating the inner space after the sealing step, wherein the pre-baking step includes: a first decreasing sub-step of decreasing a temperature of the substrate applied with the paste to a first temperature after pre-baking the paste at the highest pre-baking temperature, the first temperature being lower than the disappearance point of the binder and higher than a room temperature; and a second decreasing sub-step of decreasing, after the first decreasing sub-step, the temperature of the substrate applied with the paste from the first temperature to the room temperature, a temperature decreasing rate in the first decreasing sub-step is 400° C./hr or higher, a time required for the first decreasing sub-step falls in a range from 20 to 30 minutes inclusive and is shorter than a time required for the second decreasing sub-step, and a temperature decreasing rate in the second decreasing sub-step is 75° C./hr or lower.