Abstract: A phosphor paste is applied to inner surfaces of a cell. Then, a conveyer moves a substrate relative to a CCD camera at a constant speed. Simultaneously, two LEDs radiate visible light onto a portion, to be inspected, of the substrate. The visible light is light configured to have a wavelength so as to be able to prevent the phosphor of the phosphor paste from being excited and emitting light and reflected by a liquid surface of the phosphor paste to produce reflected light. Thereafter, the CCD camera captures an image of the phosphor paste and a data processor processes the received image data, and determines whether a phosphor layer formed by drying the phosphor paste will normally be formed, prior to formation of phosphor layer.

Abstract: A phosphor paste is applied to inner surfaces of a cell. Then, a conveyer moves a substrate relative to a CCD camera at a constant speed. Simultaneously, two LEDs radiate visible light onto a portion, to be inspected, of the substrate. The visible light is light configured to have a wavelength so as to be able to prevent the phosphor of the phosphor paste from being excited and emitting light and reflected by a liquid surface of the phosphor paste to produce reflected light. Thereafter, the CCD camera captures an image of the phosphor paste and a data processor processes the received image data, and determines whether a phosphor layer formed by drying the phosphor paste will normally be formed, prior to formation of phosphor layer.

Abstract: A phosphor paste is applied to inner surfaces of a cell. Then, a conveyer moves a substrate relative to a CCD camera at a constant speed. Simultaneously, two LEDs radiate visible light onto a portion, to be inspected, of the substrate. The visible light is light configured to have a wavelength so as to be able to prevent the phosphor of the phosphor paste from being excited and emitting light and reflected by a liquid surface of the phosphor paste to produce reflected light. Thereafter, the CCD camera captures an image of the phosphor paste and a data processor processes the received image data, and determines whether a phosphor layer formed by drying the phosphor paste will normally be formed, prior to formation of phosphor layer.

Abstract: In a fluorescent display panel containing an IC chip therein, lead conductor bonding pads exposed from an aperture of an insulator layer are arranged nearby the IC chip mounting area. At least one of the lead conductor bonding pads is provided with marker for indicating the center position of the lead conductor bonding pad. An operator of wire bonding of the display panel observes the marker by a monitor TV, and enters a compensation to a bonding program when necessary.

Abstract: In a thin film transistor controlled vacuum fluorescent display panel, alkali-free glass is used for an anode substrate. The alkali-free glass plate is provided with thin film transistors and anode-phosphor layers formed thereon. An intermediate glass plate is interposed between the alkali-free glass plate and a vacuum envelope. The value of the coefficient of linear expansion of the intermediate glass plate is selected to be between the value of the coefficient of linear expansion of glass constituting the vacuum envelope and the value of the coefficient of linear expansion of the alkali-free glass plate so as to control the influence of the distortion due to thermal stress of the panel to the anode substrate at the time of manufacture of the panel.