Abstract: A light-emitting element with high emission efficiency. The light-emitting element includes a first organic compound, a second organic compound, and a guest material. The LUMO level of the first organic compound is lower than the LUMO level of the second organic compound. The HOMO level of the first organic compound is lower than the HOMO level of the second organic compound. The HOMO level of the guest material is higher than the HOMO level of the second organic compound. The energy difference between the LUMO level of the guest material and the HOMO level of the guest material is larger than the energy difference between the LUMO level of the first organic compound and the HOMO level of the second organic compound. The guest material has a function of converting triplet excitation energy into light emission. The first organic compound and the second organic compound form an exciplex.

Abstract: A hard disk drive includes a doughnut-shaped magnetic-disk substrate having a circular hole provided in the center. The doughnut-shaped magnetic-disk substrate includes a pair of main surfaces, and an outer circumferential end surface and an inner circumferential end surface each including a side wall surface and a chamfered surface that is formed between each main surface and the side wall surface. A measurement point is provided on the outer circumferential end surface every 30 degrees in the circumferential direction with reference to a center of the substrate, and when a curvature radius of a shape of a portion between the side wall surface and the chamfered surface is determined at each measurement point, a difference in the curvature radius between neighboring measurement points is 0.01 mm or less.

Abstract: A magnetic-disk glass substrate has a circular center hole a pair of main surfaces and an edge surface. The edge surface has a side wall surface and chamfered surfaces interposed between the side wall surface and the main surfaces, and a roundness of an edge surface on an outer circumferential side is 1.5 ?m or less. Also, a midpoint A between centers of two least square circle respectively derived from outlines in a circumferential direction respectively obtained at two positions spaced apart by 200 ?m in a substrate thickness direction on the side wall surface on the outer circumferential side, and centers B and C respectively derived from a respective one of two chamfered surfaces on the outer circumferential side in the substrate thickness direction, are located such that a sum of respective distances between A and B, and A and C, is 1 ?m or less.

Abstract: A magnetic-disk glass substrate has a circular hole at a center, and includes a pair of main surfaces and a side wall surface orthogonal to the main surfaces. A roundness of the circular hole is 1.5 ?m or less. A difference between a maximum value and a minimum value of radii of three inscribed circles that are respectively derived from outlines in the circumferential direction at three positions spaced apart by 200 ?m in a substrate thickness direction on the side wall surface of the circular hole is 3.5 ?m or less.

Abstract: A hard disk drive includes a doughnut-shaped magnetic-disk substrate having a circular hole provided in the center. The doughnut-shaped magnetic-disk substrate includes a pair of main surfaces, and an outer circumferential end surface and an inner circumferential end surface each including a side wall surface and a chamfered surface that is formed between each main surface and the side wall surface. A measurement point is provided on the outer circumferential end surface every 30 degrees in the circumferential direction with reference to a center of the substrate, and when a curvature radius of a shape of a portion between the side wall surface and the chamfered surface is determined at each measurement point, a difference in the curvature radius between neighboring measurement points is 0.01 mm or less.

Abstract: A magnetic-disk glass substrate according to the present invention is a doughnut-shaped magnetic-disk glass substrate having a circular hole provided in the center, a pair of main surfaces, and an outer circumferential end surface and an inner circumferential end surface each including a side wall surface and a chamfered surface that is formed between each main surface and the side wall surface. A measurement point is provided on the outer circumferential end surface every 30 degrees in the circumferential direction with reference to a center of the glass substrate, and when a curvature radius of a shape of a portion between the side wall surface and the chamfered surface is determined at each measurement point, the difference in the curvature radius between neighboring measurement points is 0.01 mm or less.

Abstract: The solar cell module includes an anti-glare film on a transparent insulating substrate. The anti-glare film is a continuous film that contains transparent inorganic fine particles in an inorganic binder, and is free of cracks. The anti-glare film preferably has an average thickness d1 of 500 nm to 2000 nm, and a maximum surface height Ry1 of 1000 nm to 10000 nm. The inorganic binder is preferably composed mainly of silicon oxide containing Si—O bonds obtained by the hydrolysis of Si—H bonds and Si—N bonds. The inorganic fine particles are non-spherical particles having ground surfaces, and preferably have an average primary particle size, calculated from cross-sectional observations of the anti-glare film, of 0.1 ?m to 5.0 ?m.

Abstract: A magnetic-disk glass substrate has a circular center hole a pair of main surfaces and an edge surface. The edge surface has a side wall surface and chamfered surfaces interposed between the side wall surface and the main surfaces, and a roundness of an edge surface on an outer circumferential side is 1.5 ?m or less. Also, a midpoint A between centers of two least square circle respectively derived from outlines in a circumferential direction respectively obtained at two positions spaced apart by 200 ?m in a substrate thickness direction on the side wall surface on the outer circumferential side, and centers B and C respectively derived from a respective one of two chamfered surfaces on the outer circumferential side in the substrate thickness direction, are located such that a sum of respective distances between A and B, and A and C, is 1 ?m or less.

Abstract: A magnetic-disk glass substrate has a circular hole at a center, and includes a pair of main surfaces and a side wall surface orthogonal to the main surfaces. A roundness of the circular hole is 1.5 ?m or less. A difference between a maximum value and a minimum value of radii of three inscribed circles that are respectively derived from outlines in the circumferential direction at three positions spaced apart by 200 ?m in a substrate thickness direction on the side wall surface of the circular hole is 3.5 ?m or less.

Abstract: A magnetic-disk glass substrate according to the present invention is a doughnut-shaped magnetic-disk glass substrate having a circular hole provided in the center, a pair of main surfaces, and an outer circumferential end surface and an inner circumferential end surface each including a side wall surface and a chamfered surface that is formed between each main surface and the side wall surface. A measurement point is provided on the outer circumferential end surface every 30 degrees in the circumferential direction with reference to a center of the glass substrate, and when a curvature radius of a shape of a portion between the side wall surface and the chamfered surface is determined at each measurement point, the difference in the curvature radius between neighboring measurement points is 0.01 mm or less.

Abstract: A magnetic-disk glass substrate has a circular hole at a center, and includes a pair of main surfaces and a side wall surface orthogonal to the main surfaces. A roundness of the circular hole is 1.5 ?m or less. A difference between a maximum value and a minimum value of radii of three inscribed circles that are respectively derived from outlines in the circumferential direction at three positions spaced apart by 200 ?m in a substrate thickness direction on the side wall surface of the circular hole is 3.5 ?m or less.

Abstract: A magnetic-disk glass substrate has a circular center hole, a pair of main surfaces and an edge surface. The edge surface has a side wall surface and chamfered surfaces interposed between the side wall surface and the main surfaces, and a roundness of an edge surface on an outer circumferential side is 1.5 ?m or less. Also, a midpoint A between centers of two least square circle respectively derived from outlines in a circumferential direction respectively obtained at two positions spaced apart by 200 ?m in a substrate thickness direction on the side wall surface on the outer circumferential side, and centers B and C respectively derived from a respective one of two chamfered surfaces on the outer circumferential side in the substrate thickness direction, are located such that a sum of respective distances between A and B, and A and C, is 1 ?m or less.

Abstract: A magnetic-disk glass substrate according to the present invention is a doughnut-shaped magnetic-disk glass substrate having a circular hole provided in the center, a pair of main surfaces, and an outer circumferential end surface and an inner circumferential end surface each including a side wall surface and a chamfered surface that is formed between each main surface and the side wall surface. A measurement point is provided on the outer circumferential end surface every 30 degrees in the circumferential direction with reference to a center of the glass substrate, and when a curvature radius of a shape of a portion between the side wall surface and the chamfered surface is determined at each measurement point, the difference in the curvature radius between neighboring measurement points is 0.01 mm or less.

Abstract: An anti-glare film includes a first inorganic layer and a second inorganic layer in this order has form a substrate side. The first inorganic layer contains transparent spherical inorganic fine particles in an inorganic binder. The inorganic binder in the first inorganic layer mainly includes a silicon oxide containing Si—O bonds obtained by hydrolysis of a Si—H bond and a Si—N bond. The second inorganic layer contains an inorganic binder. Preferably, an average thickness of the first inorganic layer is 500 to 2000 nm, an average thickness of the second inorganic layer is 50 to 1000 nm, and a ratio is 0.025 to 0.5. The second inorganic layer may furthermore contain fine particles. The anti-glare film can be used as an anti-glare film for a solar cell module.

Abstract: A magnetic-disk glass substrate has a circular center hole, a pair of main surfaces and an edge surface. The edge surface has a side wall surface and chamfered surfaces interposed between the side wall surface and the main surfaces, and a roundness of an edge surface on an outer circumferential side is 1.5 ?m or less. Also, a midpoint A between centers of two least square circle respectively derived from outlines in a circumferential direction respectively obtained at two positions spaced apart by 200 ?m in a substrate thickness direction on the side wall surface on the outer circumferential side, and centers B and C respectively derived from a respective one of two chamfered surfaces on the outer circumferential side in the substrate thickness direction, are located such that a sum of respective distances between A and B, and A and C, is 1 ?m or less.

Abstract: A magnetic-disk glass substrate has a circular hole at a center, and includes a pair of main surfaces and a side wall surface orthogonal to the main surfaces. A roundness of the circular hole is 1.5 ?m or less. A difference between a maximum value and a minimum value of radii of three inscribed circles that are respectively derived from outlines in the circumferential direction at three positions spaced apart by 200 ?m in a substrate thickness direction on the side wall surface of the circular hole is 3.5 ?m or less.

Abstract: A magnetic-disk glass substrate according to the present invention is a doughnut-shaped magnetic-disk glass substrate having a circular hole provided in the center, a pair of main surfaces, and an outer circumferential end surface and an inner circumferential end surface each including a side wall surface and a chamfered surface that is formed between each main surface and the side wall surface. A measurement point is provided on the outer circumferential end surface every 30 degrees in the circumferential direction with reference to a center of the glass substrate, and when a curvature radius of a shape of a portion between the side wall surface and the chamfered surface is determined at each measurement point, the difference in the curvature radius between neighboring measurement points is 0.01 mm or less.

Abstract: The solar cell module includes an anti-glare film on a transparent insulating substrate. The anti-glare film is a continuous film that contains transparent inorganic fine particles in an inorganic binder, and is free of cracks. The anti-glare film preferably has an average thickness d1 of 500 nm to 2000 nm, and a maximum surface height Ry1 of 1000 nm to 10000 nm. The inorganic binder is preferably composed mainly of silicon oxide containing Si—O bonds obtained by the hydrolysis of Si—H bonds and Si—N bonds. The inorganic fine particles are non-spherical particles having ground surfaces, and preferably have an average primary particle size, calculated from cross-sectional observations of the anti-glare film, of 0.1 ?m to 5.0 ?m.

Abstract: The present invention aims to provide thin-film manufacturing equipment, a method for manufacturing a thin film, and a method for maintaining thin-film manufacturing equipment, which are capable of depositing with high productivity even in the occurrence of unexpected failure. Thin-film manufacturing equipment provided herein includes a group of deposition chambers that is a collection of deposition chambers each provided with a deposition compartment, in which a thin film is deposited on a substrate, a movable chamber designed to convey a substrate, and more than two substrate temporary holding devices each for temporarily holding a substrate, wherein the movable device is designed to deliver and receive the substrate to and from each of the deposition chambers and designed to perform at least one action selected from the group consisting of receiving and discharging of the substrate from and to each of the more than two substrate temporary holding devices.

Abstract: In a method of kneading rubber, rubber is kneaded with a kneading mixer, and the rubber thus kneaded is caused to pass through roll means to form a rubber sheet whose thickness is not more than 3 mm, whereby the rubber having a desired degree of plasticity can be obtained by using the kneading mixer only once.