| 摘要 |
PROBLEM TO BE SOLVED: To provide an image display device and a spacer used for it made easy to remove static charge at electron irradiation, and enabled to reduce a deflection quantity of electron beams. SOLUTION: In the flat image display device provided with a cathode substrate with a cold-cathode element formed, an anode substrate with a phosphor formed, and a spacer arranged between the cathode substrate and the anode substrate for supporting the both substrates, the spacer is formed of phosphoric acid glass with transition metal oxide as a main ingredient, with a thickness of a high phosphoric acid density layer on the surface part of the spacer suppressed at 0.5μm or less. It is more preferable if a conductive protection layer with waterproofness is provided. With this, a thickness of the high phosphoric acid density layer on the glass surface is suppressed, making it hard for a charge to be built up, so that a deflection quantity of electron beams can be reduced. COPYRIGHT: (C)2008,JPO&INPIT
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