Resistor electron gun for cathode-ray tube using the same and method of manufacturing resistor

Abstract

There are disclosed a resistor whose life span is long and whose miniaturization can be implemented by restraining a short-circuit among a resistor pattern, an electron gun for a cathode-ray tube provided with the resistor and a method of manufacturing the resistor. In the resistor (2), the natrium concentration of overcoat glass (4) coated on a surface thereof and covering its resistance patterns (5) is set to less than 500 ppm, and the resistor 2 is manufactured in such a manner that at a time when the overcoat glass (4) is manufactured, after a process (S2) of crushing a glass cullet which is a raw material of the overcoat glass (4), the crushed glass powder is raised with pure water to thereby set the natrium concentration thereof to less than 500 ppm.

Dependencies are inferred from the claim text.