| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a spiral resistor having high reliability with small dependency of resistivity on a burning temperature and a small change in load characteristic and temperature characteristic of the resistivity by applying resistant coating liquid including predetermined quantities of ruthenium oxide and glass powder, each having a predetermined average particle diameter, to the inner face of a glass tube. SOLUTION: A glass tube for a convergence electrode 15 is housed inside a neck 12. Subsequently, coating liquid including 1-15wt.% of ruthenium oxide (R1102) powder having an average particle diameter of 0.05-0.4μm and 85-99wt.% of glass powder having an average particle diameter of 0.01-2.0μm is applied to the inner face of the glass tube 15, thereby forming a resistant layer. The resultant resistant layer is spirally cut by a diamond tool, followed by burning at a predetermined temperature for a given period, thus fabricating a resistor for a cathode-ray tube having a sheet resistivity higher than at least 1MΩ/(square). In this case, it is preferable that a composition of the glass powder should have a thermal expansion coefficient equal to that of the glass tube 15.</p> |
