摘要:
In order to minimize a distance from a power supply line and/or a ground line of a semiconductor integrated circuit of a semiconductor device to electrodes of a printed board, at least either a power supply electrode or the ground line of the semiconductor integrated circuit is connected to a metal film through openings provided in a protective film over the power supply electrode. The metal film is exposed on a side of the semiconductor device, adjacent to a printed board on which the semiconductor device is mounted, or on a side thereof, opposite from the printed board, and the metal film is connected a power supply electrode and/or a ground electrode of the printed board through the exposed surface of the metal film. Alternatively, upper and lower metal films connected to each other, with a stress relief film interposed therebetween, may be disposed in place of the metal film, or a metal sheet may be disposed over the metal film. Further, in order to minimize the length of a heat radiation path of the semiconductor integrated circuit of the semiconductor device, the protective film is deposited on the semiconductor integrated circuit, and the metal film is exposed on the side of the semiconductor device, adjacent to the printed board on which the semiconductor device is mounted, or on the side thereof, opposite from the printed board, thereby effecting heat radiation. Alternatively, the upper and lower metal films connected to each other, with the stress relief film interposed therebetween, may be disposed in place of the metal film, or a metal sheet functioning as a heat sink is disposed over the metal film.
摘要:
In order to minimize a distance from a power supply line and/or a ground line of a semiconductor integrated circuit of a semiconductor device to electrodes of a printed board, at least either a power supply electrode or the ground line of the semiconductor integrated circuit is connected to a metal film through openings provided in a protective film over the power supply electrode. The metal film is exposed on a side of the semiconductor device, adjacent to a printed board on which the semiconductor device is mounted, or on a side thereof, opposite from the printed board, and the metal film is connected a power supply electrode and/or a ground electrode of the printed board through the exposed surface of the metal film. Alternatively, upper and lower metal films connected to each other, with a stress relief film interposed therebetween, may be disposed in place of the metal film, or a metal sheet may be disposed over the metal film. Further, in order to minimize the length of a heat radiation path of the semiconductor integrated circuit of the semiconductor device, the protective film is deposited on the semiconductor integrated circuit, and the metal film is exposed on the side of the semiconductor device, adjacent to the printed board on which the semiconductor device is mounted, or on the side thereof, opposite from the printed board, thereby effecting heat radiation. Alternatively, the upper and lower metal films connected to each other, with the stress relief film interposed therebetween, may be disposed in place of the metal film, or a metal sheet functioning as a heat sink is disposed over the metal film.
摘要:
New intermediate, an optically active (1R,5S,6S,7R)-6-tert-butyldiphenylsilyloxmethyl-7-hydroxy-bicyclo[3.3.0]octan-3-one (I) having high optical purity which is useful for the synthesis of an optically active carbacyclin and an optically active pentalenolactone E methyl ester. The compound (I) is also an intermediate compound serving for the purpose of improving the optical purity of (1R,5S,6S,7R)-3,3-ethylenedioxy-6-hydroxymethyl-7-(2'-tetrahydropyranyloxy)bicyclo[3.3.0]octane. The compound (I) is prepared by reacting (1R,5S,6S,7R)-3,3-ethylenedioxy-6-hydroxymethyl-7-(2'-tetrahydropyranyloxy)bicyclo[3.3.0]octane with tert-butylchlorodiphenylsilane in the presence of a base and removing the ethylenedioxy and tetrahydropyranyl groups of the resultant compound under an acid condition.
摘要:
A high-strength, high-conductivity copper alloy comprises, all by weight, from 0.8 to 4.0% of Sn, from more than 0.01 to 0.4% of P, from 0.05 to 1.0% of Ni, from 0.05 to 1.0% of one, two or more elements selected from Al, Hf, Be, Mo, Zn, Te, Pb, Co, Zr, and Nb, and the remainder of Cu and inevitable impurities. The impurities include not more than 0.0020% of oxygen.
摘要:
Isocarbostyrils of the formula ##STR1## wherein R is a branched alkyl of 3 to 4 carbon atoms, and the acid addition salts thereof, having .beta.-adrenergic blocking activity, are described.
摘要:
A copper alloy with high strength and excellent electrical conductivity, corrosion resistance, and spring qualities, comprises 0.4-8% nickel, 0.1-3% silicon, 10-35% zinc, concomitant impurities, and the remainder copper, all by weight. It further comprises at least one element as an accessory ingredient or ingredients selected from the group consisting of 0.001-0.1 wt % each of phosphorus and arsenic and 0.01-1 wt % each of titanium, chromium, tin, and magnesium. The accessory ingredient or ingredients combinedly account for 0.001-2% of the total weight of the alloy composition.
摘要:
A honeycomb filter includes cell walls and cells. The cell walls extend along a longitudinal direction of the honeycomb filter to define the cells between the cell walls. The cells have first cells and second cells each having a substantially square shape in a cross-section perpendicular to the longitudinal direction. The first cells are sealed and the second cells are open at one end face of the honeycomb filter. The substantially square shape of the first cells includes a first side whose extended line intersects a second side except for corner portions of the substantially square shape of the second cells. The second side and the extended line of the first side are substantially perpendicular.
摘要:
A ceramic filter assembly having improved exhaust gas processing efficiency. The ceramic filter assembly (9) is produced by adhering with a ceramic seal layer (15) outer surfaces of a plurality of filters (F1), each of which is formed from a sintered porous ceramic body. The seal layer (15) has a thickness of 0.3 mm to 3 mm and a thermal conductance of 0.1 W/mK to 10 W/mk.
摘要:
A ceramic filter assembly having improved exhaust gas processing efficiency. The ceramic filter assembly (9) is produced by adhering with a ceramic seal layer (15) outer surfaces of a plurality of filters (F1), each of which is formed from a sintered porous ceramic body. The seal layer (15) has a thickness of 0.3 mm to 3 mm and a thermal conductance of 0.1 W/mK to 10 W/mk.
摘要:
A semiconductor chip is bonded with a polyimide bonding agent to a lead frame of a copper alloy which has been plated with copper. The electrode of the semiconductor chip is connected to each terminal of the lead frame with a wire mainly comprising gold or copper and bonded portions between the semiconductor chip and the wires and between the lead frame and the wires are sealed with a resin. Thus, a semiconductor device can be manufactured.