Shadow mask, and method of manufacturing the same.

摘要

An ingot of an Invar alloy is rolled in one direction into a plate (5a), a number of slot holes (6) are formed in this plate (5a), and the plate (5a) is pressed into a curved form, thus providing a shadow mask (5) of a color CRT. The slot holes (6) of this shadow mask (5) have longitudinal axes extending substantially at right angles to the rolling direction of the plate (5a). The holes (6) maintain their shapes after the plate has been pressed.