摘要:
NF.sub.3 is prepared with good yields by reaction between fluorine gas and an ammonium complex of a metal fluoride, such as (NH.sub.4).sub.3 AlF.sub.6, in solid phase. The metal flouride ammonium complex may be one additionally containing an alkali metal, such as (NH.sub.4).sub.2 NaAlF.sub.6. The gas-solid reaction is carried out preferably at temperatures above 80.degree. C. and at relatively low partial pressures of fluorine in the gas phase of the reaction system, so that the reaction is easy to control.
摘要:
The concentration of molecular fluorine in a mixed gas such as an excimer laser gas can be determined easily, quickly and accurately by passing the mixed gas through a column packed with an alakli metal or alkaline earth metal compound which has no halogen atom and reacts with fluorine to form a solid fluoride together with molecular oxygen and/or carbon dioxide and measuring the concentration of oxygen or carbon dioxide in the fluorine-free gas flowed out of the packed column. If the mixed gas initially contains molecular oxygen or carbon dioxide, its concentration is measured separately after fixing fluorine in another column packed with an element which forms a fluoride. This analyzing method can be used in a feedback control system for controlling the concentration of fluorine in an excimer laser gas during operation of the laser to thereby stabilize the laser output power.
摘要:
A laser gas used in a rare gas halide excimer laser is efficiently refined with little loss of the essential rare gas such as Kr, Ar or Xe by contact of the laser gas with a solid alkaline compound, e.g. Ca(OH).sub.2, for conversion of acidic impurities and also the halogen source gas such as F.sub.2 or HCl into solid metal halides and contact of the remaining gas with zeolite which is adsorbent of the remaining impurities. When the halogen source gas comprises a highly oxidizing fluorine matter the laser gas is first brought into contact with a reactive metal, e.g. Si or Fe, to convert the oxidizing fluorine matter into metal fluorides to thereby prevent formation of O.sub.2, which is obstructive to the laser operation, by reaction of the oxidizing matter with the alkaline compound. The halogen source gas too can be recovered by initially cooling the laser gas so as to cause condensation of the rare gas and impurities having relatively high boiling points and leave the halogen source gas, which is lower in boiling point, in gas phase.
摘要:
(CF.sub.3 SO.sub.2).sub.2 O is formed by reaction of CF.sub.3 SO.sub.3 H with P.sub.2 O.sub.5 and taken out of the reaction system by distillation, but the residue of the distillation contains a considerable amount of unreacted CF.sub.3 SO.sub.3 H. From the residue unreacted by adding water or a phosphoric acid solution, preferably the latter, to the residue to obtain a fluidic mixture containing an adequate amount of water and subjecting the mixture to distillation, preferably under reduced pressure at temperatures ranging from 180.degree. to 280.degree. C. It is possible to form additional CF.sub.3 SO.sub.3 H during the recovery process by adding a metal salt of CF.sub.3 SO.sub.3 H to the aformentioned mixture since the metal salt is decomposed by phosphoric acid contained in the mixture.
摘要翻译:(CF 3 SO 2)2 O通过CF 3 SO 3 H与P 2 O 5的反应形成,并通过蒸馏从反应体系中取出,但蒸馏残余物含有大量未反应的CF 3 SO 3 H。 从残留物中加入水或磷酸溶液未反应的残余物加入到残渣中,得到含有足量水的流体混合物,优选在180-280℃的温度下进行减压蒸馏 在回收过程中可以通过向上述混合物中加入CF 3 SO 3 H的金属盐形成另外的CF 3 SO 3 H,因为金属盐被混合物中所含的磷酸分解。
摘要:
A method of refining tungsten hexafluoride containing molybdenum hexafluoride as an impurity includes the step of contacting the tungsten hexafluoride with at least one metal selected from the group consisting of Mo, W, Cu, Ni, Fe, Co, Zn, Ti, Al, Ca and Mg at a temperature ranging from 100.degree. to 500.degree. C. Molybdenum hexafluoride is efficiently removed from the tungsten hexafluoride by the method.
摘要:
Provided is a solid-state imaging element including pixel signal read lines, and a pixel signal reading unit for reading pixel signals from a pixel unit via the pixel signal read line. The pixel unit includes a plurality of pixels arranged in a matrix form, each pixel including a photoelectric conversion element. In the pixel unit, a shared pixel in which an output node is shared among a plurality of pixels is formed, and a pixel signal of each pixel in the shared pixel is capable of being selectively output from the shared output node to a corresponding one of the pixel signal read lines. The pixel signal reading unit sets a bias voltage for a load element which is connected to the pixel signal read line and in which current dependent on a bias voltage flows in the load element, to a voltage causing a current value to be higher than current upon a reference bias voltage when there is no difference between added charge amounts, when addition of pixel signals of the respective pixels in the shared pixel is driven.
摘要:
A manual sweeping printer has a linear thermal head and sweeps in a direction perpendicular to an arranging direction of the thermal head, thereby performing printing. The printer alternately drives two adjacent heating elements to perform 2-time-division printing. When a sweeping velocity of the printer exceeds a maximum sweeping velocity set in accordance with a printing speed, a divisional driving sequence is controlled to perform staggered printing.
摘要:
A fastening apparatus using magnetism enables to fasten an object with a magnetic material to a target surface. The apparatus has a substrate which is flexible and provided at its reverse side with a sticking coat for removably attaching to the target surface, and a magnet receiving hole surrounded by the sticking coat penetrating through the substrate; a flat magnet housed into the magnet receiving hole; an outer film which is fixed on the substrate for separating the flat magnet and the object. The flat magnet is able to be removed out from the magnet receiving hole.
摘要:
The invention provides a selective adsorption method for refining NF.sub.3 gas containing CF.sub.4 as impurity. At a temperature not higher than 10.degree. C. the NF.sub.3 gas is brought into contact with a crystalline and porous synthetic zeolite, which is substantially uniform in pore size and about 4.9 .ANG. in effective pore size and is commerciallized under the name of molecular sieve 5A, on condition that the content of water of crystallinity in the synthetic zeolite is 1-10 wt. %, and preferably 6-10 wt. %. The synthetic zeolite efficiently adsorbs NF.sub.3 with little adsorption of CF.sub.4.
摘要:
Provided is a solid-state imaging element including pixel signal read lines, and a pixel signal reading unit for reading pixel signals from a pixel unit via the pixel signal read line. The pixel unit includes a plurality of pixels arranged in a matrix form, each pixel including a photoelectric conversion element. In the pixel unit, a shared pixel in which an output node is shared among a plurality of pixels is formed, and a pixel signal of each pixel in the shared pixel is capable of being selectively output from the shared output node to a corresponding one of the pixel signal read lines. The pixel signal reading unit sets a bias voltage for a load element which is connected to the pixel signal read line and in which current dependent on a bias voltage flows in the load element, to a voltage causing a current value to be higher than current upon a reference bias voltage when there is no difference between added charge amounts, when addition of pixel signals of the respective pixels in the shared pixel is driven.