摘要:
A chemical vapor deposition (CVD) system for depositing a material selectively on a part of a substrate comprises a reaction chamber in which a CVD process is performed, a substrate holder and substrate heater provided within the reaction chamber, a gas inlet fixture provided on the reaction chamber for introducing one or more CVD source gases into the reaction chamber, and a reactant distribution fixture provided on the gas inlet fixture within the reaction chamber for controlling distribution of the reactant species in the reaction chamber, wherein the reactant distribution fixture defines a subspace surrounding the substrate within the space of the reaction chamber such that the subspace has a dimension, measured in a direction generally perpendicular to the surface of the substrate such that the dimension is at least less than one half of the mean free path of the reactant species realized inside the space of the reaction chamber during the CVD process and such that an opening is formed for communicating the subspace inside the reaction distribution means with the rest of the space of the reaction chamber for freely passing product species formed as a result of the chemical reaction at the surface of the substrate.
摘要:
The present invention relates to sliding parts, precision parts and timepieces and electronic equipment using those parts. Sliding parts are composed by a resin in which the degree of orientation of a fibrous filler is higher at the portion serving as the sliding surface than inside the sliding part, and the fibrous filler is oriented along the sliding surface on the sliding surface. Alternatively, precision parts are composed by a resin to which has been added carbon fibers for which a carbon compound is thermally decomposed to carbon in the vapor phase and simultaneously grown directly into fibers simultaneous to this thermal decomposition. Moreover, timepieces and electronic equipment are composed by these sliding parts or these precision parts.
摘要:
An optically active compound which itself generally exhibits no antiferroelectric liquid crystal phase, but which can be added to an antiferroelectric liquid crystal or composition thereof having a high threshold voltage to reduce the threshold voltage of the resulting composition. Also disclosed is an antiferroelectric liquid crystal composition containing the optically active compound, a process for reducing the threshold voltage of an antiferroelectric liquid crystal composition, a process for producing the optically active compound, and a process for producing an optically active carboxylic acid as an intermediate.
摘要:
An electrical interconnection assembly which prevents a slack of insulated wire pieces interconnecting wire receiving terminals and is high in reliability in electric connection between them and suitable for high density wiring. The assembly comprises an insulating support body, a plurality of wire receiving terminals mounted on the insulating support body and each having a wire receiving slot formed at an end portion thereof, each of the wire receiving terminals having a terminal portion at the other end thereof, an insulated wire selectively received in the slots of the wire receiving terminals and cut into a plurality of wire pieces in such a manner as to form a predetermined wiring pattern, and a plurality of wire holding bosses provided on the insulating support body for holding intermediate portions of the wire pieces extending between the wire receiving terminals to retain the insulated wire in the predetermined wiring pattern. Also a process of and an apparatus for manufacturing such electrical interconnection assembly and a wire laying jig for use with such process and apparatus are disclosed.
摘要:
An optically active 7-substituted-1,4-dioxepan-5-one derivative represented by the general formula (I): ##STR1## wherein R represents an alkyl group having from 1 to 5 carbon atoms; and * means an asymmetric carbon atom, is disclosed. An optically active polymer represented by formula (II): ##STR2## wherein R and * are as defined above; and n is an integer of 25 or more, obtained by ring opening polymerization of the optically active 7-substituted-1,4-dioxepan-5-one derivative represented by formula (I) is also disclosed. A process for producing the optically active polymer represented by formula (II) is further disclosed, comprising subjecting an optically active 7-substituted-1,4-dioxepan-5-one derivative represented by formula (I) to ring opening polymerization in the presence of at least one catalyst selected from the group consisting of (i) an organotin compound, (ii) an organoaluminum compound and water, and (iii) an organozinc compound and water.
摘要:
An electrical interconnection assembly which prevents a slack of insulated wire pieces interconnecting wire receiving terminals and is high in reliability in electric connection between them and suitable for high density wiring. The assembly comprises an insulating support body, a plurality of wire receiving terminals mounted on the insulating support body and each having a wire receiving slot formed at an end portion thereof, each of the wire receiving terminals having a terminal portion at the other end thereof, an insulated wire selectively received in the slots of the wire receiving terminals and cut into a plurality of wire pieces in such a manner as to form a predetermined wiring pattern, and a plurality of wire holding bosses provided on the insulating support body for holding intermediate portions of the wire pieces extending between the wire receiving terminals to retain the insulated wire in the predetermined wiring pattern. Also a process of and an apparatus for manufacturing such electrical interconnection assembly and a wire laying jig for use with such process and apparatus are disclosed.
摘要:
A liquid crystal compound represented by formula: ##STR1## wherein R.sub.1 represents a straight chain alkyl group having from 4 to 18 carbon atoms; R.sub.2 represents a straight chain alkyl group having from 2 to 6 carbon atoms or a branched alkyl group having from 3 to 6 atoms and having a methyl group as a side chain; and m and n each represents 1 or 2, is disclosed.The liquid crystal compound of formula (I) is optically and electrically stable and exhibits fast electro-optical switching in image display.
摘要:
A pallet for material handling comprises a deck board and a pluralities of legs which are fixed to the under surface of the deck board with specified spacings. The deck board is constituted of laminated corrugated fibreboard, and each of the legs is formed by a square-tubular frame, which is made of a corrugated fibreboard, and in which a pad or pads made of plastic resin is inserted. The deck board of a durable light weight structure, has a roughened top surface to prevent slips of a cargo. The legs are so constructed to support heavy load without deforming and collapse, and are designed to prevent absorption of moisture.
摘要:
A color cathode ray tube wherein spring-back of a skirt of a shadow mask which causes the distortion of apertures of the shadow mask is prevented. The shadow mask is formed to exhibit a radius of curvature on an opposing pair of edges thereof. The shadow mask may be formed to exhibit a radius of curvature on four opposing edges. The radius of curvature is substantially equal to a radius of curvature of an apertured area of the shadow mask.