摘要:
The present invention provides a biphenyl based epoxy resin comprising a curing agent and an inorganic filler containing an alkali alkaline earth metal oxide wherein the epoxy resin has a variation rate of hardness at 25° C. and a relative humidity of 50% for 72 hours of less than 10% and a variation rate of flow at 25° C. and a relative humidity of 20% or below for 72 hours of less than 20%.
摘要:
There are provided a method of manufacturing a glass substrate for information recording media that allows the inner and outer peripheral edge surfaces of the glass substrate for information recording media to be smoothed easily and inexpensively, a glass substrate for information recording media manufactured using this method, and an information recording medium using this glass substrate. A donut-shaped glass disk for information recording media having an outer peripheral edge surface and an inner peripheral edge surface is prepared. At least one of the outer peripheral edge surface and the inner peripheral edge surface of the glass disk is smoothed by melt-heating to a temperature at or above the softening point of the glass by irradiating with at least one laser beam. As a result, at least one of the outer peripheral edge surface and the inner peripheral edge surface of the glass disk becomes smooth and rounded, and hence a polishing step used in a conventional method can be omitted, and moreover chamfering in a grinding step can also be omitted.
摘要:
In one pixel, a stepped difference portion having an inclination degree a/b is formed on an alignment control layer, the alignment control layer is made of a material in which a liquid crystal alignment capability is given according to a polarization light radiation, and according to the polarization light radiation the liquid crystal alignment capability is added in the vicinity of the stepped difference portion. A thick and transparent organic high molecular layer is interposed between the alignment control layer and a substrate and a close adhesion characteristic and a transparency characteristic can be made compatible therewith. Accordingly, a problem in which the manufacturing margin in an alignment processing is narrow can be solved, and generation of a display failure according to a fluctuation in the initial alignment direction can be reduced. In this way, a large size liquid crystal display apparatus having a high quality and in which the contrast ratio is heightened can be provided.
摘要:
A method of forming a semiconductor device having a multi-layered wiring structure that includes a conductor layer to be electrically connected to a packaging substrate, with the multi-layered wiring structure being provided on a circuit formation surface of a semiconductor chip. Ball-like terminals are formed, disposed in a grid array on the surface of the multi-layered wiring structure on the packaging substrate side. The multi-layered wiring structure is formed to include a buffer layer for relieving a thermal stress provided between the semiconductor chip and the packaging substrate, due to the packaging procedure. In the semiconductor device formed, the wiring distance is shorter than that of a conventional semiconductor device, so that an inductance component becomes smaller, to thereby increase signal speed. The distance between a ground layer and a power supply layer is shortened, to reduce noise produced upon operation, and also a thermal stress upon packaging is relieved by the buffer layer of the multi-layered wiring structure, resulting in improved connection reliability, and the number of terminals per unit can be increased, because of elimination of wire bonding. The buffer layer can be made of an elastomer, and can have a modulus of elasticity of 10 kg/mm2 or less.
摘要:
A mold for producing a glass article having an opening and a protruding hollow portion, said mold comprising(A) a female mold comprised of a main female mold member and an auxiliary female mold member, the inside shapes of the depressed portions of the two female mold members substantially defining the outside shape of the glass article,(B) a male mold defining the inside shape of that part of the glass article, and(C) a gas exhaust port formed in an inmost position of the depressed portion of the auxiliary female mold member, and/or(D) a gas introducing port formed in the male mold in a position facing the depressed portion of the auxiliary female mold member.And a method for producing the glass article by using the mold.
摘要:
A wiring glass substrate includes a glass substrate formed of glass and having a plurality of holes formed at predetermined positions, bumps so formed as to be connected to a conductive material filling the holes and wirings formed on a surface opposite to a surface having the bumps formed thereon and electrically connecting a plurality of connection terminals arranged in intervals different from intervals of the holes to the conductive material. The shape of the conductive material is porous and porous electrodes are bonded to the inner wall surfaces of the holes by an anchor effect to increase the strength of the glass substrate.
摘要:
There is provided a fiber-reinforced composite material containing fibers having an average fiber diameter of 4 to 200 nm and a matrix material, the composite material having a visible light transmittance of 60% or more at a wavelength of 400 to 700 nm, which is a conversion value based on a thickness of 50 μm. A fiber-reinforced composite material composed of a matrix material and a fiber aggregate impregnated therewith is provided, in which when a segment length of a bright region corresponding to a pore region of the fiber aggregate is represented by L, which is obtained by statistical analysis of a unidirectional run-length image formed from a binary image obtained by binarization of a scanning electron microscopic image of the fiber aggregate, the total length of segments that satisfy L≧4.5 μm is 30% or less of the total analyzed length. A transparent multilayered sheet, a circuit board, and an optical waveguide are provided which use a transparent substrate formed from this fiber-reinforced composite material.
摘要:
A liquid crystal display apparatus includes a pair of substrates, a liquid crystal layer arranged therebetween, a plurality of electrodes formed on one substrate for applying an electric field substantially in parallel to a face of the substrate, a plurality of active elements connected to the electrodes, and an alignment control layer formed on a face of at least one of the substrates and being in contact with said liquid crystal layer. A surface of the alignment control layer which is in contact with the liquid crystal layer has stepped difference portions, and a ratio a/d between a height of a maximum one of the stepped difference portions and a maximum thickness d of said liquid crystal layer has a range of 0.02-1. The alignment control film is made from a polyamic acid obtained by reacting a diamine with an acid anhydride of 1,2,3,4-cycle butane-tetracarboxylic acid dianhydrides.
摘要:
A thin film capacitor comprising a lower electrode formed on a predetermined surface, a dielectric layer formed on the lower electrode, and an upper electrode formed on the dielectric layer, wherein the end portion of the lower electrode is further covered by an insulator other than the dielectric layer.
摘要:
A liquid crystal display apparatus includes a pair of substrates, a liquid crystal layer arranged therebetween, a plurality of electrodes formed on one substrate for applying an electric field substantially in parallel to a face of the substrate, a plurality of active elements connected to the electrodes, and an alignment control layer formed on a face of at least one of the substrates and being in contact with said liquid crystal layer. A surface of the alignment control layer which is in contact with the liquid crystal layer has stepped difference portions, and a ratio a/d between a height of a maximum one of the stepped difference portions and a maximum thickness d of said liquid crystal layer has a range of 0.02-1. The alignment control film is made from a polyamic acid obtained by reacting a diamine with an acid anhydride of 1,2,3,4-cycle butane-tetracarboxylic acid dianhydrides.