Method of manufacturing plasma display panel and firing apparatus
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHiroyasu Tsuji, Makoto Morita, Masanori Suzuki
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Abstract
A transition section for relieving the temperature difference between a front and a back of a substrate is provided before a temperature section at which constituent elements are fired. As a result, a method of manufacturing a plasma display panel and a firing apparatus, where the temperature difference between the front and the back of the substrate in a substrate-moving direction is prevented and the constituent elements are fired well, can be provided.
Claims4
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 T1(° C) with a first temperature gradient;
- a transition step for heating the substrate from the first temperature T1 (° 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 T2 (° C) higher than the first temperature T1 (° C.), and
- wherein the first temperature T1 (° C) and the second temperature T2 (° C) have the following relation 0.9×T2≦T1<T2, and
- a condition of heating is controlled in a such manner that the second temperature gradient at the transition step is zero.
A firing apparatus for a plasma display panel (PDP) comprising:
- a conveyer for conveying a substrate;
- a firing unit for firing the substrate while being conveyed by the conveyer, the firing unit including a plurality of heaters divided into a plurality of heating units arranged along the substrate-moving direction of the conveyer, wherein temperature conditions in each of the heating units can be individually controlled so that the substrate can be fired with a predetermined temperature pattern;
- and
- wherein the heating units are controllable so as to include:
- a temperature rising section for heating the substrate to a first temperature T1(° C) with a first temperature gradient;
- a transition section for heating the substrate from the first temperature T1 (° C) with a second temperature gradient that is smaller than the first temperature gradient;
- and
- a temperature keeping section for keeping temperature for a predetermined period at a second temperature T2 (° C) higher than the first temperature T1 (° C.),
- wherein the first temperature T1 (° C) and the second temperature T2 (° C) can be maintained so as to satisfy the relation 0.9×T2≦T1<T2, and
- a condition of heating can be controlled in such a manner that the second temperature gradient at the transition step is zero.
Dependencies are inferred from the claim text.