Plasma display panel and a process for producing the same

A process for producing a plasma display panel comprising the steps of:

• preparing a first panel member and a transparent second panel member, one of said panel members carrying a sealing material along its edge, one of said panel members having at least one port formed therethrough, while the other of said panel members carries at least one blocking member positioned to register with said port when said first and second panel members are brought adjacent to each other and having a height which is smaller than said sealing material, and which is larger than the prospective final distance between said two panel members;
• placing said first and second panel members in a parallel and spaced apart relation to each other, so that said sealing material contacts the other of said panel members to define an enclosure between said panel members while said blocking member faces said port and stays within said enclosure;
• evacuating said enclosure;
• filling said enclosure with a discharge gas;
• heating the whole structure defined by said first and second panel members and said blocking member to soften said sealing material so that said softened material joins said panel members along the edges and forms a gas-tight seal therebetween;
• while softening said blocking member so that said softened member forms a gas-tight closure of said port in the first of a solidified product which has been solidified in sealing engagement with the interior surface of said one panel member surrounding said port and with the interior surface of the other of said panel members opposite the location of said port, whereby the interior surface of said one panel member surrounding said port is sealingly attached to the interior surface of the other of said panel members through said blocking member around said port.