AC driven plasma device for flat lamps and method of manufacture

A method for manufacturing an AC driven plasma device for flat lamps having an upper plate containing a front glass substrate and a lower plate containing a rear glass substrate, which comprises:

• forming a transparent electrode layer of Indium Oxide, Tin on the front glass substrate,
• forming a bus electrode having a desired thickness peripherally to the transparent electrode by covering the transparent electrode layer with a metal mask and depositing Cr or Al thereon in a vacuum atmosphere,
• covering the bus electrode with a metal mask and forming a Magnesium Oxide layer of a protective film, of desired thickness, on the transparent electrode by vacuum deposition,
• forming a metal electrode layer by vacuum deposition of Cr or Al on one side of the rear glass substrate having a thickness of over 4 mm,
• dividing the rear surface glass substrate by glass partition walls into a plurality of discharge cells which have a depth of 2-3 mm and a width of several hundreds μm to several mm, and
• applying a white colored fluorescent material on the side and bottom of the discharge cells, and
• sintering the composite structure, wherein the upper and lower plates are molded and attached together using a sealing material so that the protective film of the upper plate is opposite to the white colored fluorescent material of the lower plate and opposite to the discharge cells, and
• replacing the air in the discharge cells with discharge gas at a desired atmospheric pressure.