Abstract: A light-emitting device (52) suitable for a flat-panel cathode-ray tube display contains a light-emissive region (66) formed over a plate (64). The light-emissive region contains a plurality of light-emissive particles (72). Part of the outer surface of each of a group of the light-emissive particles is conformally covered with a group of intensity-enhancement coatings (82 and 84).

Abstract: A phosphor powder is composed of a host material made of an element coming under the group II of the periodic table and an element coming under the group VI of the periodic table, an activator and a co-activator, the amount ratio of the activator to the host material is 1×10−4 to 1×10−3 parts by weight when the amount ratio of the host material is 1 part by weight, and the co-activator has a molar concentration equal to a molar concentration of the activator.

Abstract: A luminescence crystal particle which emits light upon irradiation with an energy beam and which has a crystal defect density of 5×107 defects/cm2 or less in a region located from the surface of the luminescence crystal particle to a portion as deep as the energy beam reaches.

Abstract: A light-emitting device (52) suitable for a flat-panel cathode-ray tube display contains a light-emissive region (66) formed over a plate (64). The light-emissive region contains a plurality of light-emissive particles (72). Part of the outer surface of each light-emissive particle is conformally covered with a coating (74) that provides light reflection or/and gettering.

Abstract: A phosphor powder is composed of a host material made of an element coming under the group II of the periodic table and an element coming under the group VI of the periodic table, an activator and a co-activator, the amount ratio of the activator to the host material is 1×10−4 to 1×10−3 parts by weight when the amount ratio of the host material is 1 part by weight, and the co-activator has a molar concentration equal to a molar concentration of the activator.

Abstract: A light-emitting device (52, 80, 110, 128, or 130) suitable for a flat-panel cathode-ray tube display contains a light-emissive region (66) formed over a plate (64). The light-emissive region contains a plurality of light-emissive particles (72). Part of the outer surface of each light-emissive particle is conformally covered with one or more coatings (74, 82, 84, 112, and 114). The coatings variously provide light-reflection, gettering, intensity-enhancement, and contrast-enhancement functions.

Abstract: A luminescence crystal particle which emits light upon irradiation with an energy beam and which has a crystal defect density of 5×107 defects/cm2 or less in a region located from the surface of the luminescence crystal particle to a portion as deep as the energy beam reaches.

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.

Abstract: Additive elements are added to Fe-N soft magnetic thin films along with oxygen, so that the thermal stability is remarkably improved. After annealing treatment at approximately 550.degree. C., it is possible to provide an Fe-N soft magnetic thin film with a low coercive force. Similarly, it is also possible to provide a soft magnetic thin film having a low coercive force by introducing a combination of specific types of additive elements to Fe-N soft magnetic thin films. When oxygen is further added to the film, it is also possible to provide a soft magnetic thin film which has very excellent soft magnetic characteristics and good thermal stability. The soft magnetic thin films of the invention have good soft magnetic characteristics, a high saturation magnetic flux density and good thermal stability. A magnetic head of a metal-in-gap type using the soft magnetic thin film is also described.

Abstract: A method and apparatus for forming a drum seam. A tray-like end plate having a cylindrical portion forming an indented shape and an outward extending end plate flange formed by the edge of the cylindrical portion is fitted into the end of a cylindrical drum body having a body flange extending outward from the edge thereof perpendicular to the cylindrical axis of the body with the end plate flange overlapping and extending along and beyond the body flange. A seaming chuck having a cylindrical forming face is fitted into the tray-like end plate for holding the body and end plate together with the forming face of the seaming chuck against the inner surface of said cylindrical portion and rotated for rotating the drum body and end plate. The seaming chuck has a fillet on the end adjacent the position where the end plate flange extends from the cylindrical portion and an inclined surface extending from the forming face outwardly thereof.