Abstract: A night vision system, a microchannel plate (MCP), and a planetary deposition system and methodology are provided for selectively depositing an electrode contact metal on one side of MCP channel openings. One or more MCPs can be releasably secured to a face of a platter that rotates about its central platter axis. The rotating platter can be tilted on a rotating ring fixture surrounding an evaporative source of contact metal. Therefore, the rotating platter further rotates so that it orbits around the evaporative source of contact metal. A mask with a variable size mask opening is arranged between the rotating platter and the evaporative source. While the mask orbits around the evaporative source with the rotating platter, the mask does not rotate along its own axis as does the rotating platter.

Abstract: A deposition mask apparatus including a frame, a supporter including a plurality of supporting members fixed to the frame, and a deposition mask fixed to the frame is provided. The plurality of supporting members include at least a first supporting member that is closest to an intermediate position between a third portion and a fourth portion of the frame and a second supporting member that is located closer to the third portion of the frame than the first supporting member. The first supporting member in a state of warping downward from the frame with a first warping amount supports the deposition mask from below. The second supporting member in a state of warping downward from the frame with a second warping amount that is smaller than the first warping amount supports the deposition mask from below.

Abstract: A standard mask apparatus includes at least one standard mask including at least one through-hole. The standard mask apparatus may include standard regions each including the at least one through-hole. The standard regions may be arranged in a first direction and in a second direction that intersects with the first direction. A ratio of a dimension of each standard region in the first direction to a dimension of an interval between two of the standard regions in the first direction may be higher than or equal to 0.1. A ratio of a dimension of each standard region in the second direction to a dimension of an interval between the two standard regions in the second direction may be higher than or equal to 0.1.

Abstract: A deposition mask unit includes a deposition mask sheet including a plurality of openings, and a deposition mask frame including a raised portion at which the deposition mask sheet is attachable to the deposition mask frame. The raised portion includes a support portion, and a bonding portion protruding from an upper surface of the support portion, an upper surface of the bonding portion being curved.

Abstract: The present invention relates to posts, carriages, methods of manufacturing the components and their assembly into a barrier. The invention also includes a Z post attachment includes an attachment tab 8.016 and end engagement flange 8.024, 8.026 adapted to engage the end of the post. The arrangement can include a delineator 8.030 which is skew in relation to the tab 8.016, so as to provide reflector faces 8.032 which face oncoming traffic.

Abstract: A coating membrane for a component of a gas-turbine engine includes a solid membrane having a metallic foil or a polymeric film, and having a thickness and at least one kerf extending through the thickness to define a kerf pattern such that the solid membrane can be applied to a compound-curved surface. Also disclosed are a coated component coated with the membrane, and a method for producing a coated component with the membrane.

Abstract: A mask plate, a mask plate assembly including the mask plate, a method for manufacturing the mask plate and a method for manufacturing the mask plate assembly are provided according to the present disclosure. The mask plate is used in evaporating to the display substrate, and includes a plurality of grooves arranged in an array form and on a surface of the mask plate. An opening is arranged in the middle of each of the grooves, and the opening corresponds to a display region of a display substrate.

Abstract: A mask sheet and a method for manufacturing the same are provided. A mask sheet includes one or more openings defined therein, and an alloy of nickel and iron, and a particle of the alloy has a single crystalline structure. A method for manufacturing a mask sheet includes preparing a base sheet including an alloy of nickel and iron, performing a heat treatment on the entire base sheet; and forming one or more openings in the heat-treated base sheet.

Abstract: Discussed are an FFS mode LCD device capable of enhancing a transmittance ratio by including a color filter of a three-dimensional pattern structure having a transmissive pattern for selectively transmitting light of a specific wavelength by using a surface plasmon phenomenon, and a method for fabricating the same. The metal layer using a surface plasmon is utilized as a common electrode of the array substrate, and the pixel electrode having slits is formed on the metal film, thereby generating a fringe field. This may simplify the entire processes, and remove color filter processing lines, thereby reducing the installation costs.

Abstract: A microscale vacuum electronic device (10) provides for a mechanical modulation of cathode (12) position with respect to the anode position, the anode electrically biased with respect to the cathode and held in an evacuated housing with the cathode, allowing improved high-frequency modulation of an electron beam (24) useful for vacuum electronic devices such as klystrons, klystrodes, and high frequency triodes.

Abstract: A mask frame on which a mask, having a pattern area and a mask edge defining the pattern area, is fixed comprises: a through opening corresponding to the pattern area; and a base corresponding to the mask edge. The base is provided with discharging holes formed therein, and a vacuum pump is coupled to the discharging holes so that the mask is fixed to the mask frame without damaging the pattern formed on the pattern area of the mask.

Abstract: A field emission display (FED) includes first and second substrates opposing one another with a predetermined gap therebetween. The FED also includes cathode electrodes formed in a stripe pattern on the first substrate, and a plurality of electron emission sources formed on the cathode electrodes; gate electrodes formed on the first substrate in a state insulated from the cathode electrodes and the electron emission sources by an insulating layer; and anode electrodes formed on a surface of the second substrate opposing the first substrate, and including phosphor layers formed thereon. A pair of fixing rails are formed along two opposing edges of one of the first and second substrates, the fixing rails having undergone a blackening process; and a metal grid provided between the first and second substrates and welded to an upper surface of the fixing rails.

Abstract: An airtight container manufacturing method, comprises: exhausting the inside of a container via a through-hole provided on the container; arranging a plate member on the outer surface of the container the inside of which was exhausted, so as to close up the through-hole; and sealing the container by arranging a cover member so as to cover the plate member and by bonding the arranged cover member and the outer surface of the container to each other via a sealant positioned between the cover member and the outer surface of the container, wherein the sealing includes hardening the sealant after deforming the sealant as pressing the plate member.

Abstract: A correction filter used in the exposure for forming a phosphor screen includes three kinds of correction filters consisting of a grading filter, a monochroic local correction filter and a multi-color local correction filter. With the use of three kinds of correction filters, it is possible to improve the whiteness uniformity which may be degraded due to the wall thickness difference at the center and a peripheral portion of a panel portion of a flat-face-type color cathode ray tube.

Abstract: In an exposure step for forming a phosphor screen of a color cathode ray tube, correction lenses which are arranged between a light source and a panel are used in a state that a common correction lens which is used in common for three colors and three kinds of monochroic correction lenses are combined. The present invention can, in a flat-face-type color cathode ray tube, prevent the generation of the mislanding attributed to the difference in a wall thickness between a center portion and a peripheral portion of a panel thus improving the color purity.

Abstract: Disclosed herein is a display including: a pixel array part configured to include pixels that are arranged in a matrix, each having an electro-optical element, a write transistor for writing a video signal, a drive transistor for driving the electro-optical element based on the video signal written by the write transistor, and a holding capacitor connected between the gate and source of the drive transistor, wherein the holding capacitor includes a first electrode, a second electrode disposed to face one surface of the first electrode for forming a first capacitor, and a third electrode disposed to face the other surface of the first electrode for forming a second capacitor, and the first capacitor and the second capacitor are connected in parallel to each other electrically.

Abstract: An electrode sheet for a plasma display panel and a plasma display panel utilizing the same. The electrode sheet for the plasma display panel includes: a dielectric layer having a first surface and a second surface and including a discharge hole for providing a side wall of a discharge space, the dielectric layer being composed of metal oxide (MxOy); and a discharge electrode including a discharge unit around a perimeter of the discharge hole and a connection unit for connecting the discharge unit and another discharge unit to each other, the discharge electrode being within the dielectric layer and composed of metal (M) of the metal oxide (MxOy). Here, the discharge unit of the discharge electrode is within the dielectric layer such that the first surface of the dielectric layer has an area differing from that of the second surface of the dielectric layer.

Abstract: An electrode sheet, a method of manufacturing the electrode sheet, and a plasma display panel having the electrode sheet. The electrode sheet includes: a plurality of electrodes arranged at substantially constant distances apart, each of the electrodes having a discharge space in its central region; an electrode line for connecting the electrodes along a first direction; and a dielectric enclosing the electrodes and the electrode line and connecting the electrodes along a second direction, wherein the electrodes and the electrode line are composed of magnesium (Mg), and the dielectric is composed of magnesium oxide (MgO).

Abstract: Provided is a display apparatus and a method of fabricating the display apparatus. The display apparatus includes a first substrate that allows visible light to pass therethrough, a second substrate facing the first substrate, an anode disposed on the first substrate, a cathode disposed on the second substrate, an electron emitter disposed either on the anode or the cathode, a light emitting layer formed on a surface of the anode, an optical reflection layer disposed on a side of the second substrate, and a gas that generates ultraviolet rays and is filled in a space between the first substrate and the second substrate. The display apparatus can increase the reflectance of visible light since the optical reflection layer is formed in a sealed inner space of the display apparatus, and thus, brightness and light emission efficiency of the transmissive type or reflective type display apparatus can be increased.

Abstract: A method for fabricating a liquid crystal display includes: providing an array substrate and a color filter substrate facing the array substrate; forming a gate electrode and a gate line formed of a first conductive film on the array substrate through a first masking process; forming a second conductive film pattern at an upper portion of the gate electrode, a storage capacitor preliminary pattern at a partial upper region of the gate electrode and a data line substantially crossing the gate line to define a pixel region, the second conductive film pattern, the storage capacitor preliminary pattern and the data line being formed of a second conductive film through a second masking process; forming an opaque insulation film surrounding the data line; forming a transparent third conductive film on the entire surface of the array substrate with the opaque insulation film interposed therebetween; patterning the second conductive film pattern and a third conductive film through a third masking process to form a so

Abstract: A mask that facilitates OLED processing and is capable of being made cost-effectively is presented. The mask includes a mask frame, a connection frame fastened to the mask frame, a mask plate welded to the connection frame, and a plurality of fastening members that fasten the connection frame to the mask frame. The connection frame, which is capable of being welded to the mask plate, is interposed between the mask plate and the mask frame to create a tension in the mask plate. Thus, it is possible to manufacture a shadow mask that does not sag. The mask frame may be formed with a light metal such as aluminum.

Abstract: A phosphor screen is formed on an inner surface of a face portion whose outer surface is substantially flat. A shadow mask faces the phosphor screen. The shadow mask includes a perforated portion having a plurality of apertures, a non-perforated portion formed on a periphery of the perforated portion and a skirt portion formed on a periphery of the non-perforated portion. The non-perforated portion includes a pair of longer side portions each having an outer bead and an inner bead that are adjacent to each other and a pair of shorter side portions each having the outer bead and an inner bead that are adjacent to each other. In each of the pair of longer side portions, the spacing between the outer bead and the inner bead is at least 2 mm. This makes it possible to suppress wavy wrinkles generated in the perforated portion, so that the image quality of a color picture tube can be improved.

Abstract: An apparatus (10) for, and method of, placing a plurality of spacers (12) between a parallel opposed anode and cathode (20) of an emissive display includes temporarily securing, by applying a vacuum for example, a first side of one of the anode or cathode to a base (14) having a plurality of electromagnets (16) positioned therein. The electromagnets (16) attract a first side of each of the plurality of spacers (12), thereby positioning each of the spacers (12) in a desired location on a second side of the one of the anode or cathode (20). The spacers (12) may be provided from a shuffling tray (40) having a plurality of openings (42), each opening (42) approximately aligned with one of the electromagnets (16) and shaped so as to present the first side to the electromagnet (16) to the one of the anode or cathode (20).

Abstract: An electron amplifier and a method of manufacturing the same are provided. The electron amplifier includes a substrate in which a plurality of through holes are formed, a resistive layer deposited on the sidewalls of the through holes, an electron emissive layer including carbon nanotubes which is deposited on the resistive layer, and an electrode layer formed on each of the upper and lower sides of the substrate. Because the electron emissive layer of the electron amplifier is uniform and provides a high electron emission efficiency, the electron amplification efficiency is improved. The electron amplifier manufacturing method enables economical mass production of electron amplifiers.

Abstract: The present invention provides a shadow mask having an improved resistance to an impact such as vibration or dropping so as to keep a constant quality of a color cathode-ray tube.

Abstract: In accordance with one specific embodiment of the present invention, the ion optics for use with an ion source have a plurality of electrically conductive grids that are mutually spaced apart and have mutually aligned respective pluralities of apertures through which ions may be accelerated and wherein each grid has an integral peripheral portion. A plurality of moment means are applied to a circumferentially distributed plurality of locations on the peripheral portion of each grid, which is initially flat, thereby establishing an annular segment of a cone as the approximate shape for that peripheral portion and a segment of a sphere as the approximate dished shape for the grid as a whole. The plurality of grids have conformal shapes in that the direction of deformation and the approximate spherical radii are the same.

Abstract: A welding route of welding a color selecting electrode to a frame is as follows: first of all, a welding head moves down onto one end portion of a long frame side (Step I), welding is conducted from the end portion toward a center portion of the long frame side (Step II). Then, after moving up once (Step III), the welding head moves horizontally toward the other end portion of the long frame side (Step IV) and moves down onto the long frame side (Step V), and welding is conducted from the other end portion toward a center portion of the long frame side (Step VI). Finally, the welding head retracts (Step VII). With this welding route, the generation of wrinkles in the vicinity of the end portions of the long sides of the color selecting electrode can be suppressed.

Abstract: To provide a method for manufacturing a color selection electrode structure easily capable of measuring a tension amount of the color selection electrode in the process for manufacturing the color selection electrode structure and a color cathode ray tube using the color selection electrode structure. The color selection electrode is stretched with tension applied in the direction of the shorter axis thereof, and welded and fixed onto the top face that is curved inwardly in the direction of the longer axis of the longer side members. Thereafter, the weight is placed on the color selection electrode so as to allow the color selection electrode to deflect by the load due to the mass of the weight. The deflection amount of the color selection electrode may be measured by using a laser displacement meter and the measured deflection amount of the measured color selection electrode is converted into the tension amount by the correlation graph.

Abstract: The invention provides a nanostructure including an anodized film including nanoholes. The anodized film is formed on a substrate having a surface including at least one material selected from the group consisting of semiconductors, noble metals, Mn, Fe, Co, Ni, Cu and carbon. The nanoholes are cut completely through the anodized film from the surface of the anodized film to the surface of the substrate. The nanoholes have a first diameter at the surface of the anodized film and a second diameter at the surface of the substrate. The nanoholes are characterized in that either a constriction exists at a location between the surface of the anodized film and the surface of the substrate, or the second diameter is greater than the first diameter.

Abstract: A cathode ray tube is provided which includes a panel having a fluorescent surface formed on an inside surface thereof, a tension type shadow mask fitted to the panel with a gap formed therebetween, and a frame. The frame includes two main frames fixed to the tension type shadow mask under tension, and two subframes fixed respectively to ends of the two main frames. A distance between the two main frames between a center part or portion of the main frame and an edge part or portion. To assemble the frame assembly and the shadow mask, the main frames are compressed, the tension type shadow mask is welded thereto, and the compression applied to the main frames is then released. The invention improves a howling characteristic by reducing a vibratory length of the shadow mask and increasing a natural frequency of the center part or portion of the shadow mask.

Abstract: A color cathode-ray tube (CRT) having an evacuated envelope with an electron gun therein for generating at least one electron beam is provided. The envelope further includes a faceplate panel having a luminescent screen with phosphor elements on an interior surface thereof. A focus mask, having a plurality of spaced-apart first conductive strands, is located adjacent to an effective picture area of the screen. The spacing between the first conductive strands defines a plurality of apertures substantially parallel to the phosphor elements on the screen. Each of the first conductive strands has a substantially continuous insulating material layer formed on a screen facing side thereof. A plurality of second conductive wires are oriented substantially perpendicular to the plurality of first conductive strands and are bonded thereto by the insulating material layer. The insulating material layer comprises a low porosity lead-zinc-borosilicate glass.

Abstract: After assembling a framework in an approximately rectangular form, a basis plane is formed by grinding a bottom surface of the framework. Then, ends of two opposing sides of the framework on a side opposite to the basis plane are cut in a predetermined shape by shearing. The grinding can be carried out by placing the framework on a grinding surface that is running, while applying substantially no pressurizing force other than the self weight of the framework. According to this method, precision of forming end faces of a framework on which a shadow mask is mounted can be improved. Also, working time can be shortened.

Abstract: A mask for a color cathode ray tube (CRT) and a manufacturing method thereof are provided. This mask includes a plurality of strips isolated from each other at predetermined intervals in parallel, and a plurality of bridges for forming slots through which electron beams pass by connecting adjacent strips to each other. In this mask, each of the bridges between adjacent strips has a first curved portion formed on the side from which electron beams come out, and a second curved portion formed on the side upon which electron beams are incident. The first curved portion has a first width in the direction perpendicular to the length direction of the strips, and extends in the length direction of the strips. The second curved portion has a second width that is smaller than the first width in the length direction of the adjacent strips.

Abstract: H-members (11) each have an approximately triangular shape in cross section, and are controlled to be small in thickness especially for weight reduction. A position for applying a pressure by a pressure member (23) is determined in such a way that a contact surface (27) of the pressure member (23), which comes into contact with the H-members (11), covers a joint (S1) between two sides of each of the H-members (11) having an approximately triangular shape in cross section. The pressure member (23) applies a pressure through surface-to-surface contact, and thereafter, grille strips (12) are cooperatively fixed to the H-members (11). As a result, a tension distribution causing no degradation of a display oscillation property is obtained. Further, application of a pressure by the pressure member (23) causes no partial deformation of the H-members (11), whereby generation of a wrinkle is prevented.

Abstract: In a method of manufacturing a color-separating electrode structure for color cathode ray tube, welding is performed by rolling a roller electrode with a rotation shaft being tilted so that an electrode surface of the roller electrode faces to an inside of a substantially rectangular frame, and by pressing a pressing roller to a portion defined as the portion of an outside of a contact portion in which an outer edge portion of an upper surface of the side of the frame is kept in contact with a rear surface of the color-separating electrode, both the roller electrodes and the pressing rollers being rolled together along the contact portion, whereby the color-separating electrode structure having sufficient welding strength can be obtained with higher stability.

Abstract: The color-separating electrode structure for use in a color CRT includes a color-separating electrode body which is substantially rectangular in form and fixed in a tensioned condition to a frame made by a sheet metal bending or flexing process. The frame includes two supporting parts opposed to each other, each of the supporting parts having a flexed portion that extends in parallel to an upper edge and a lower edge of the color-separating electrode body and has a predetermined curvature. The color-separating electrode body is welded to the frame at contact portions thereof each of which is in contact with corresponding one of the flexed portions of the supporting parts.

Abstract: A method and apparatus of maintaining spacing between tension mask strands in a tension mask. The method includes providing a tension mask with strands connecting therebetween and attaching a set of barrier ridge elements to a first side of the strands. Next, the tension mask is tensioned and affixed to a mask frame to form a mask frame assembly.

Abstract: A shadow mask is arranged to face a phosphor screen formed on an inner surface of a panel. A plurality of aperture columns are formed in parallel in the shadow mask. Each aperture column includes a plurality of apertures arranged in line at a predetermined interval. On both sides of each aperture column on the surface of the shadow mask facing the electron gun, stripe-shaped dielectric layers for acting on electron beams toward the apertures are formed respectively, and extend in substantial parallel with the aperture columns. The shadow mask is manufactured in such a manner that stripe-shaped insulating material layers are formed on the surface of a mask base material facing the electron gun, the mask base material is thereafter shaped into a predetermined shape, and the insulating material layers on the shaped mask are sintered.

Abstract: A material is provided for marking aperture grilles for use in a color picture tube which has excellent yield strength, high temperature creep strength, and superior magnetic characteristics as compared to conventional materials. The material is made by cold-rolling a low carbon sheet containing 9 to 30 weight % of Ni or 9 to 30 weight % of Ni and 0.1 to 5 weight % of Co, and annealing the cold-rolled steel sheet at a temperature of 400-500° C.

Abstract: A photocathode as a source of electron beams, having a substrate of optically transmissive diamond and a photoemitter. A photocathode with a single emitting region provides a single electron beam; a photocathode with multiple emitting regions provides multiple electron beams. The photoemitter is positioned on the side of the diamond substrate opposite the surface on which the illumination is incident, and has an irradiation region at the contact with the optically transmissive diamond, and an emission region opposite the irradiation region, these regions being defined by the path of the illumination. The diamond substrate at the irradiation region/emission region interface conducts heat away from this focused region of illumination on the photocathode. Alternately, a diamond film is used for heat conduction, while another material is used as a substrate to provide structural support.

Abstract: An electron lens is used for focusing electrons from a cathode to an anode. The lens includes a first conductive layer with a first opening at a first distance from the cathode. The first conductive layer is held at a first voltage. The lens also includes a second conductive layer with a second opening at a second distance from the first conductive layer and a third distance from the anode. The second conductive layer is held at a second voltage substantially equal to the voltage of the anode. The first and second openings are chosen based on the first voltage, the second voltage, the first distance, the second distance and the third distance. The opening focuses the electrons emitted from the cathode onto the anode to a spot size preferably less than 40 nanometers. The force created between the cathode and anode is minimized by the structure of the lens.

Abstract: A method for making a shadow mask array is taught. Producing a plurality of shadow mask sections; inspecting the plurality of shadow mask sections to determine which shadow mask sections are acceptable as meeting predetermined criteria; positioning a predetermined number of the acceptable mask sections into predetermined locations relative to one another to form a mask section array thereby distributing any error in individual mask sections across the mask section array; and attaching the individual mask sections of the mask section array to a support structure. The support structure allows for expansion and/or contraction of the individual mask sections of the mask section array while maintaining relative positioning of the individual shadow mask section in the shadow mask array.

Abstract: A shadow mask is formed from a plate member comprising an outer frame portion, a body portion of a shadow mask having an outer peripheral line formed through an etching process and a plurality of connection portions through which the body portion of the shadow mask is supported by the outer frame portion. The shadow mask is formed from the plate member by removing the outer frame portion from the body portion of the shadow mask. In this process, a break portion is formed to the shadow mask by removing the outer frame portion so as to be recessed inward from the outer peripheral line of the shadow mask.

Abstract: A color cathode ray tube includes a transparent panel, a funnel joined airtightly to a circumference portion of a sidewall of the panel, a light absorption layer (black layer) and an optical filter layer both disposed on an interior surface of the transparent panel, and a phosphor layer formed thereon. A length from an edge of the panel joined to the funnel to a circumference edge of the light absorption layer formed on an interior surface of the sidewall of the panel is longer than or equal with that from the edge of the panel to a circumference edge of the optical filter layer formed similarly on an interior surface of the sidewall of the panel. The color cathode ray tube can be manufactured by making a length from an edge of the panel to a scraping edge of the light absorption layer in the trimming step of the light absorption layer longer than or equal with that from the edge of the panel to a scraping edge of the filter layer in the trimming step of the filter layer.

Abstract: A welding route of welding a color selecting electrode to a frame is as follows: first of all, a welding head moves down onto one end portion of a long frame side (Step I), welding is conducted from the end portion toward a center portion of the long frame side (Step II). Then, after moving up once (Step III), the welding head moves horizontally toward the other end portion of the long frame side (Step IV) and moves down onto the long frame side (Step V), and welding is conducted from the other end portion toward a center portion of the long frame side (Step VI). Finally, the welding head retracts (Step VII). With this welding route, the generation of wrinkles in the vicinity of the end portions of the long sides of the color selecting electrode can be suppressed.

Abstract: A tension mask assembly for a color cathode ray tube includes a tension mask including at least two divided portions, each having a plurality of strips separated a predetermined distance from each other for forming slots, and each having a plurality of bridges for connecting the strips and defining slots, and a frame including first and second support members for supporting both end portions of the divided portions so that tension is applied to the strips of the divided portions and at least one pair of elastic members for supporting the first and second support members.

Abstract: A method and apparatus for applying crosswires to a tension mask. The method includes winding crosswires around various drum assemblies and then using transfer devices to remove sections of crosswires and transfer them to tension mask frame assemblies.

Abstract: A purpose of the present invention is to provide material of an aperture grille used for a color picture tube having excellent yield strength, excellent high temperature creep strength and excellent magnetic characteristic, material of an aperture grille used for a color picture tube for improving an occurrence of cracking during a hot rolling step, a method for producing these material, an aperture grille and a color picture tube with the aperture grille. After adding nickel of 0.01 to 1.75 wt % to low carbon alloy steel including copper of 0.05 to 2.5 wt % and phosphor of 0.001 to 0.4 wt %, material according to the present invention is cold rolled. Then, a precipitation treatment is processed at a temperature of 300 to 700° C. Alternatively, the material is cold rolled and secondary rolled after passing through an intermediate annealing at a temperature of 500 to 800° C. Then, the precipitation treatment is processed.

Abstract: A mask-frame assembly for a cathode ray tube includes a mask frame having a front portion and a side portion perpendicularly extending from the edge of the front portion and having notches, and a shadow mask having a front screen portion and a skirt portion welded to non-notched parts of the side portion of the mask frame. A portion of the skirt portion is not welded to the mask frame but exposed outside the mask frame so as to improve a thermal exchange.

Abstract: A stretched mask for a color picture tube and a material for the stretched mask. The stretched mask is formed from a nickel-iron alloy steel sheet made of a nickel-iron alloy containing 35.0% to 37.0% by weight of nickel and 0.01% to 0.06% by weight of carbon. The nickel-iron alloy steel sheet is provided with apertures by etching using a pattern provided on the sheet. The stretched mask is free from image degradation due to a rise in temperature.