Abstract: An inner shield assembly capable of maximizing an external magnetism shield effect. The inner shield assembly is provided at the rear side of a frame assembly for shielding external magnetism and includes a main body for shielding the inside of a funnel, a rectangular beam shield combined to the front of the main body and a front portion extending from the edge of the front of the beam shield around the outside of the shadow mask and the frame assembly. The material of the front portion has a maximum permeability of at least 3,000 and a coercivity of at most 1.25 Oe.

Abstract: The present invention discloses an inner shield assembly which is capable of maximizing an external magnetism shield effect by improving a structure of the inner shield assembly and by optimizing the magnetic characteristic of component material of the improved inner shield assembly.

Abstract: Disclosed is a flat-type cathode ray tube having an improved panel, which enhances proof-explosion properties caused in the course of making a color cathode ray tube large-sized and inner and outer surfaces thereof flat-typed. The flat-type cathode ray tube according to the present invention comprises: a rectangular panel, which includes a flat outer surface, an inner surface having a predetermined curvature, and a skirt portion substantially perpendicularly extending from the inner and outer surfaces; and a funnel coupled to an actual edge of the skirt portion of the panel.