The present invention was to achieve a high efficiency and high brightness to optimize the structure of the electrode structure and mercury-free fluorescent layer relates to a flat discharge lamp. ; mercury-free discharge lamp of the present invention is flat back substrate, the rear substrate is formed on the upper back side electrode member, said back-side electrode dielectric material of a predetermined thickness formed on top and a rear surface, including a phosphor layer made of formed over the dielectric; A transparent dielectric material, the front portion consisting of a fluorescent material including front-side electrode formed on the transparent dielectric body and a lower portion that is formed on the transparent dielectric thereon; The rear side and the front portion is interposed between the rear surface and jidoe comprises a spacer and a discharge gas sealed inside the discharge spaces to form a discharge space enclosed with the front portion, the front body and the back side electrode achieved by implementing at least one side of the electrode body into a number of linear electrodes.
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