US 5,846,110 AGranted

Method of manufacturing plasma display panels with convex surface

AssigneeFujitsu Limited

InventorsShinji Kanagu, Masashi Amatsu

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Abstract

Front substrate and back substrate of a PDP are respectively in a warped state such that a central portion of each substrate projects more frontwards than peripheral portions of the respective substrate, so that the front surface is convex. A stress remains in the substrates such that the two substrates are pressed to each other with an elastic deformation. In preparing the two substrates, the front panel and back panel are respectively warped towards each other so that the facing inner surfaces are convex in being sealed with each other. A height difference ratio of the central portion from a central part of a short side of the back substrate is preferably less than 0.16%. A height difference ratio of the central portion from a central part of a short side of the front substrate is preferably less than 0.06%. Difference of the height difference ratios of the back substrate and the front substrate is preferably 0 to 0.1 point.

Claims28

Dependent claims

A method of manufacturing a plasma display panel, an external envelope of the plasma display panel being formed of a front substrate and a back substrate, the front substrate and the back substrate being opposing each other via discharge space and a plurality of separator walls mutually in parallel, said separator walls defining the discharge spaces in a pixel array, the method comprising:

a front panel process for making a front panel, a first group panel-constitutional elements being formed upon a first surface of said front substrate, said front panel process comprising a step for warping said front substrate by heating said front substrate so that a central portion of said front substrate protrudes toward said first surface of said front substrate;
a back panel process for making a back panel, a second group panel-constitutional elements being formed upon a first surface of said back substrate, said back panel process comprising a step for warping said back substrate by heating said back substrate so that a central portion of said back substrate protrudes toward said first surface of said back substrate;
a sealing process for sealing peripheral edge portions of the opposing areas of said front panel and said back panel by a heating process while said first surfaces of both said front panel and said back panel are facing each other and are pressed to each other, and while at an elastic deformation such that a stress is generated so as to press said central portions of said front panel and said back panel toward each other.

A method of manufacturing a plasma display panel, comprising the steps of:

forming first and second substrates, each having a main surface bounded by a periphery disposed in a corresponding plane, the main surface of one of the substrates being warped so as to protrude from the corresponding plane of the periphery thereof and one of said first and second substrates having formed thereon a plurality of separator walls of a substantially common height and having respective, exposed top surfaces;
stacking the first and second substrates with the respective main surfaces thereof in opposed relationship and such that the protruding central portion of the main surface of the one substrate projects toward the main surface of the other substrate;
and
engaging the respective peripheries of the first and second substrates and sealing the engaged peripheries, producing stresses in at least one of the first and second substrates urging the respective top surfaces of the plurality of separator walls against the opposed main surface of the other of the first and second substrates.

1 more element

Dependencies are inferred from the claim text.