摘要:
This invention relates to lubricant base oil having high viscosity indexes and low pour points, and particularly to lubricant base oil consisting essentially of a normal paraffin and an isoparaffin, wherein (a) an average carbon number Nc in one molecule is not less than 28 but not more than 40, and (b) an average branch number Nb in one molecule calculated from a ratio of CH3 carbon to total carbon determined by 13C-NMR analysis and the average carbon number Nc in one molecule is not more than (0.2Nc−3.1) but not less than 1.5.
摘要翻译:本发明涉及具有高粘度指数和低倾点的润滑剂基础油,特别涉及基本上由正链烷烃和异链烷烃组成的润滑剂基础油,其中(a)一分子中的平均碳数Nc不小于28,但 不超过40,和(b)由通过13 C-NMR分析确定的CH 3 N 3碳与总碳的比例计算的一个分子中的平均分支数Nb;以及 一个分子中的平均碳数Nc不大于(0.2Nc-3.1)但不小于1.5。
摘要:
An acoustic compressor has an acoustic resonator and a piston reciprocated by an actuator at a base of the acoustic resonator. A valve device is provided on the upper end of the acoustic resonator. The valve device comprises a suction chamber and a discharger chamber. External air is fed through an inlet to the suction chamber and sucked into the acoustic resonator through the suction bore. Then, the air in the resonator is compressed by the reciprocating piston. The discharge chamber has a discharge bore and an outlet to the outside. An outward nonreturn valve is larger in valve-opening resistance than an inward nonreturn valve in the suction bore. When the air pressure in the resonator exceeds a certain value, the high-pressure air is transferred to the discharge chamber through the discharge bore by allowing the outward nonreturn valve to open and then discharged through the outlet to the outside.
摘要:
The present invention is a CVD process for forming a thin film which includes a step of recovering an organometallic compound component from an exhaust gas which has been conventionally discarded, and a purifying step of purifying the recovered organometallic compound to thereby eliminate a by-product formed in a film forming step by CVD. According to this process, the organometallic compound is recycled. As a recovering technique, any of the followings is employed: a technique in which the exhaust gas is cooled and is recovered as a recovered content; a technique in which the exhaust gas is brought into contact with a solvent to dissolve the organometallic compound in the solvent; and a technique in which the exhaust gas is brought into contact with an adsorbent to thereby adsorb the organometallic compound. A purifying technique is selected depending on the recovering technique or the properties of the recovered content, and any of a technique of distilling the recovered content, a technique of sublimating the recovered content, and a technique of heating the adsorbent to desorb the organometallic compound is employed. These CVD thin film processes can recover and purify the organometallic compound in a higher yield by adding a step of eliminating oxygen from the exhaust gas prior to the recovering step.
摘要:
A liquid crystal composition comprising; as a first component, at least one compound selected from a group of compounds represented by Formula (1); as a second component, at least one compound selected from a group of compounds represented by Formula (2); as a third component, at least one compound selected from a group of compounds represented by Formula (3); as a forth component, at least one compound selected from a group of compounds represented by Formula (4); and as a fifth component, at least one compound selected from a group of compounds represented by Formulas (5-1) and (5-2), in which each compound represented by the Formula (1) to (5-2) is defined in the specification.
摘要:
The disclosed is a method of producing two organic ruthenium compounds; i.e., bis(ethylcyclopentadienyl)ruthenium and (alkylcyclopentadienyl)cyclopentadienylruthenium, which are useful for producing thin film through CVD. In one aspect, the invention provides a method for producing bis(ethylcyclopentadienyl)ruthenium, including hydrogenating bis(acetylcyclopentadienyl)ruthenium in the presence of a catalyst. In another aspect, the invention provides a method of producing (alkylcyclopentadienyl)cyclopentadienylruthenium, including acylating bis(cyclopentadienyl)ruthenium with carboxylic anhydride in the presence of phosphoric acid as a catalyst, to thereby produce (acylcyclopentadienyl)cyclopentadienylruthenium, and reducing the (acylcyclopentadienyl)cyclopentadienyl ruthenium.
摘要:
A semiconductor device comprising a wiring circuit board and a semiconductor chip mounted through a bump electrode on the circuit board, a space between the circuit board and the semiconductor chip as well as a periphery of the semiconductor chip being encapsulated with a resin containing a filler. The resin is constituted by a first resin disposed in a region surrounded by bump electrodes positioned on the outermost periphery of the semiconductor chip, and by a second resin disposed in a region not surrounded by bump electrodes positioned on the outermost periphery of the semiconductor chip, the first and second resins being distinct from each other in at least one feature selected from a content, a maximum particle diameter and an average particle diameter of the filler.
摘要:
A paste applicator for drawing a paste film in a desired pattern on a substrate, including a table for detachably supporting a substrate, a paste reservoir tube to be filled with a paste, and a nozzle communicating with the paste reservoir and having a paste discharging port opposing to an upper surface of the substrate mounted on the table. A device is supplied for changing the relative positional relationship between the nozzle and the substrate mounted on the table. The paste is applied onto the substrate to form a desired pattern of the paste. A measuring device measures a position of a paste discharging port of a nozzle exchanged together with the paste reservoir tube by using a paste pattern formed by applying the paste onto the substrate held on the table using the exchanged nozzle. The center of the paste pattern nearly agrees with the center of the paste discharging port. A calculator calculates a positional displacement of the paste discharging port due to the nozzle exchange using the measured result obtained by the measuring device. A positioning device positions the substrate at a desired position with respect to the paste discharging port after nozzle exchange using the result obtained by the calculator.
摘要:
For each media information element constituting a display screen image in a multimedia system, main data and attribute data are stored in a storage. After the user copies a media information element from a screen layout to another screen layout, until an attribute of the media information element is altered in either one of the layouts, the main data and/or the attribute data of the media information element is not copied in the storage of the system. Moreover, when the user varies an attribute of a media information element in one of the layouts, only attribute data of the media information element is changed in the storage. The media information includes music pieces and voices in addition to characters and graphic images.
摘要:
A silicon single crystal pulling-up apparatus includes a silica glass crucible for accommodating a melted silicon material, a cylindrical member made of a carbon composite material which is composed of a carbon fiber wound round a cylinder, impregnated with a resin and carbonized, disposed on an upper end of a cylindrical portion of the crucible for accommodating the melted silicon in association with the cylindrical portion of the crucible, a wall thickness of the cylindrical member being not more than 3 mm, a rotational shaft for rotating the crucible, and a crucible support fixed to an upper end of the rotational shaft for supporting the crucible.