| 摘要 |
PROBLEM TO BE SOLVED: To prevent unevenness on ribs as much as possible in a method for forming the ribs on a substrate for a plasma display by means of thermal processing using a laser beam. SOLUTION: First, an insulation layer 4 is formed by applying a thermoset insulation material having a small percentage of constriction to the surface of a substrate 3A for a back panel and by drying it. Next, a laser beam 5 having an irradiation diameter corresponding to a predetermined rib width is radiated to the insulation layer 4 at a predetermined rib interval while scanning it at a speed at which only the surface of the insulation layer 4 is thermally set, so that the upper part of a part to be formed into ribs is thermally set. Sand blasting 7 is applied to the surface of the insulation layer 4 so that non-thermoset parts 6 are removed, and the insulation layer is washed and dried. Finally, in order to strengthen the remaining non-thermoset parts 6 as the ribs including thermoset parts 18, uniform thermosetting is applied to all over the substrate 3A for a back panel, so that the ribs 1 are formed. Since only the surface of the insulation layer 4 is thus thermally set, unevenness is hardly produced on the ribs.
|
