| 摘要 |
PROBLEM TO BE SOLVED: To provide a display device made so as to hold a grid electrode at an exact location. SOLUTION: A rim 26 made of glass or a ceramic material at a high temperature is mounted on an alloy sheet in a through hole and electron is focused on a fluorescent layer 33 by using voltage applied on the sheet. An optional insulating layer is formed on the sheet, an optional grid electrode is formed on the insulating layer, and addressing and focusing are performed. Because the rim 26 holds tensile force on the alloy sheet according to cooling, a cathode 16, the alloy sheet for pixel dots and holes of the grid electrode are properly aligned and held without being affected by a change in temperature. When the rim 26 is mounted on a cathode plate and a face plate 12, an exact aligning process is completed and assembling of a device is simplified. By using the thin rim 26 and a substrate, thickness of a combined electrode structure becomes 3 mm or below, a distance between the face plate 12 and a back plate 14 becomes 10 mm and the device becomes suitable for an ultrathin large-sized screen display.
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