Abstract: A method for forming a through-hole in a glass substrate includes the steps of (a) radiating a laser beam to a glass substrate, so that a through-hole penetrating the glass substrate from a first surface to a second surface is formed in a radiation area of the glass substrate, and a constricted part is formed in the through-hole, and (b) causing a discharge via the through-hole by applying a direct-current voltage between the first and second surfaces of the glass substrate, so that a diameter of a cross section of the constricted part that is substantially orthogonal to a longitudinal axis of the through-hole is increased.

Abstract: The invention has an object to provide a display glass substrate capable of reducing poor film application and a method for manufacturing the same. The display glass substrate is a display glass substrate 20 for use in a flat panel display constituted of two main surfaces and four end faces. In this display glass substrate, when one main surface is set horizontal, the substrate end portion area 21 of at least one main surface existing in the range of 1˜30 mm inwardly of the substrate end E0 thereof has an elevation difference of 15 ?m or less.

Abstract: The invention has an object to provide a display glass substrate capable of reducing poor film application and a method for manufacturing the same. The display glass substrate is a display glass substrate 20 for use in a flat panel display constituted of two main surfaces and four end faces. In this display glass substrate, when one main surface is set horizontal, the substrate end portion area 21 of at least one main surface existing in the range of 1˜30 mm inwardly of the substrate end E0 thereof has an elevation difference of 15 ?m or less.

Abstract: The present invention relates to a liquid crystal display panel including: two glass substrates facing each other; and a liquid crystal interposed between the two glass substrates, in which one of the two glass substrates has streaks running along a direction of a short side of the glass substrate; and the other glass substrate has streaks running along a direction of a long side of the glass substrate.

Abstract: A bottom mold for molding a glass panel for a cathode ray tube includes a hollow portion defined by a rectangular bottom wall 2 and a side wall 3 provided on four sides of the bottom wall. A refrigerant is supplied to a central portion of the bottom wall 2 from under the bottom wall to cool a glass panel for a cathode ray tube 5 to be filled in the hollow portion. The bottom wall 2 has a hollow layer 4 provided at the central portion to enhance cooling of a peripheral portion of the bottom mold by preventing the central portion from being excessively cooled.

Abstract: A glass funnel for a cathode ray tube capable of increasing the rigidity of a body portion having a rectangular-shaped open end portion and reducing the weight of the glass funnel wherein on at least a long side of the body portion, arched face portions are formed so as to be substantially perpendicular to an open end face of the body portion and an arch-like ridge portion in each of the arched face portions is extended to portions in the vicinity of the open end portion, whereby stresses generated in the body portion can be transmitted to the corner portions of high rigidity of the open end portion along the ridge portions.

Abstract: A glass funnel for a cathode ray tube capable of increasing the rigidity of a body portion having a rectangular-shaped open end portion and reducing the weight of the glass funnel wherein on at least a long side of the body portion, arched face portions are formed so as to be substantially perpendicular to an open end face of the body portion and an arch-like ridge portion in each of the arched face portions is extended to portions in the vicinity of the open end portion, whereby stresses generated in the body portion can be transmitted to the corner portions of high rigidity of the open end portion along the ridge portions.

Abstract: A glass funnel for a cathode ray tube capable of increasing the rigidity of a body portion having a rectangular-shaped open end portion and reducing the weight of the glass funnel wherein on at least a long side of the body portion, arched face portions are formed so as to be substantially perpendicular to an open end face of the body portion and an arch-like ridge portion in each of the arched face portions is extended to portions in the vicinity of the open end portion, whereby stresses generated in the body portion can be transmitted to the corner portions of high rigidity of the open end portion along the ridge portions.

Abstract: Stress concentration that causes at a central portion of side surfaces of a glass funnel body portion close to a sealed portion is restrained by providing concaves in diagonal portions of the glass funnel body portion, which have the highest rigidity.