| 摘要 |
An electron tube such as a fluorescent display tube is provided. Auxiliary linear support members (e.g. linear spacers and linear dampers), which subsidiarily support liner members (e.g. cathode filaments and wire grids), are bonded on a substrate, using ultrasonic welding (without using an adhesive agent (e.g. fritted glass or a conductive paste)). A metal layer 22 (e.g. a thin or thick aluminum film) is formed over the glass substrate 11. The end of the coil 131 of a cathode filament 13 is securely bonded to the metal layer 22. A spacer 151 of a metal wire (e.g. aluminum) is ultrasonic welded to the metal layer 22. The welding is performed with the wedge tool of an ultrasonic welder placed at the position where the spacer 151 is in contact with the cathode filament 13. A U-shaped recess is left at the welded spot. This recess prevents the cathode filament from being displaced. If necessary, the metal layer 142 is formed over the substrate 11 and the damper 152 of a metal wire (e.g. aluminum) is disposed to prevent the vibration of the cathode filament 13.
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