摘要:
Device for cleaning silicon wafers having an upper mist-generating chamber with a high frequency oscillator to generate an aqueous hydrofluoric acid mist and a lower region processing chamber separated by a partitioning wall having a shutter to open and close. Silicon wafers are held in an upright position in a rack. The processing chamber and the shutter have gas jets to eject gas between the silicon wafers and water spray heads in the processing chamber to spray water between the silicon wafers.
摘要:
An improvement is proposed in the cleaning treatment of semiconductor silicon wafers in which the conventional step of cleaning with an aqueous solution of an alkali is replaced with a cleaning treatment with a temporarily alkaline pure water which is produced electrolytically by the application of a DC voltage between a cathode and an anode bonded to the surfaces of a hydrogen-ion exchange membrane so that the alkaline cleaning treatment can be performed under mild conditions so as to eliminate the troubles due to formation of COPs unavoidable in the conventional process. In addition, the pure water rinse following the alkali cleaning of the wafers before transfer to the succeeding acidic cleaning step can be omitted to greatly contribute to the improvement of productivity. The apparatus used therefor comprises a rectangular vessel divided into a central cathode compartment, in which the wafers are held in a vertical disposition within an up-flow of pure water, and a pair of anode compartments by partitioning with a pair of hydrogen-ion exchange membranes, on both sides of which a cathode plate and anode plate are bonded.
摘要:
An improvement is proposed in the cleaning treatment of semiconductor silicon wafers in which the conventional step of cleaning with an aqueous solution of an acid is replaced with a cleaning treatment with a temporarily acidic pure water which is produced electrolytically by the application of a DC voltage between an anode and a cathode bonded to the surfaces of a hydrogen-ion exchange membrane so that the acidic cleaning treatment can be performed under mild conditions so as to eliminate the troubles unavoidable in the conventional process. The apparatus used therefor comprises a rectangular vessel partitioned into a central anode compartment, in which the wafers are held in a vertical disposition within an upflow of pure water, and a pair of cathode compartments on both sides of the anode compartment by partitioning with a pair of hydrogen-ion exchange membranes, on both sides of which an anode plate and a cathode plate are bonded.
摘要:
In a cleaning apparatus, a cleaning solution spray means itself is given a function of producing OH.sup.- ionized water and H.sup.+ ionized water and can spray OH.sup.- ionized water and H.sup.+ ionized water, as cleaning solutions immediately after they are produced, upon a substrate to be cleaned, and one of OH.sup.- ionized water and H.sup.+ ionized water can be selectively used as a cleaning solution. This cleaning apparatus includes a substrate holding member for holding a substrate to be cleaned, and a cleaning solution spray member for spraying a cleaning solution upon the substrate. The cleaning solution spray member includes an electrolytic ion generating member for radical-activating or ionizing pure water, and an ultrasonic wave generating member for spraying the radical-activated or ionized pure water, by carrying it on ultrasonic waves, upon the substrate.
摘要:
Disclosed is an alkaline storage battery comprising a negative electrode, a positive electrode, a separator and an alkaline electrolyte solution in a package can. The negative electrode contains a hydrogen storage alloy represented by the following general formula: Ln1-xMgx(Ni1-yTy)z (wherein Ln represents at least one element selected from lanthanoid elements, Ca, Sr, Sc, Y, Ti, Zr and Hf; T represents at least one element selected from V, Nb, Ta, Cr, Mo, Mn, Fe, Co, Al, Ga, Zn, Sn, In, Cu, Si, P and B; and 0
摘要:
An alkaline storage battery system according to an aspect of the present invention, with which a partial charging-discharging is performed, includes an alkaline storage battery 10 including an electrode group having a nickel positive electrode 11, a hydrogen storage alloy negative electrode 12, a separator 13; an alkaline electrolyte; and an outer can 14 accommodating the electrode group and the alkaline electrolyte, and further includes a partial charge-discharge control unit for controlling charging-discharging of the battery 10. In addition, zinc (Zn) is added to nickel hydroxide that is a main positive electrode active material in the nickel positive electrode 11 with an addition amount of 5% by mass or less with respect to the mass of nickel in the positive electrode active material. The concentration of the alkaline electrolyte is 6.5 mol/L or less and the content of lithium in the alkaline electrolyte is 0.3 mol/L or more.
摘要:
A nickel electrode for alkaline secondary battery including a porous sintered nickel substrate loaded with a nickel hydroxide-based active material, the nickel electrode has a configuration wherein a surface portion of the active material loaded into the sintered nickel substrate is provided with a combination of a first coating layer of a suitable compound and a second coating layer of a suitable compound, or a coating layer of a compound of two or more suitable elements, or wherein the coating layer of two or more suitable elements is formed between the sintered nickel substrate and the active material.
摘要:
Disclosed is a sintered nickel positive electrode that has an expanded usable range to a low charging region by using nickel hydroxide having a particular crystal structure as a main component of a positive electrode active material.In the sintered nickel positive electrode of the invention, a nickel sintered substrate is filled, through a plurality of impregnation steps, with a positive electrode active material containing nickel hydroxide (β-Ni(OH)2) as a main component. In addition, the nickel hydroxide (β-Ni(OH)2) has an integrated intensity ratio of a peak intensity in a (001) face of 1.8 or more with respect to a peak intensity in a (100) face, where the peak intensities are determined by X-ray diffraction analysis, while an integrated intensity ratio of a peak intensity in a (001) face with respect to a peak intensity in a (100) face is about 1.5 in the related art. Using the nickel hydroxide having an integrated intensity ratio of the peak intensity in the (001) face of 1.8 or more with respect to the peak intensity in the (100) face enables high-rate continuous discharge in a low charging region.
摘要:
In an alkaline secondary battery provided with a positive electrode, a negative electrode, a separator to be interposed between the positive electrode and the negative electrode, and an alkaline electrolyte solution, the above-mentioned separator has carbon-carbon double bonds. Further, an average amount of carbon-carbon double bonds in the separator is in the range of 10 &mgr;mol/g to 200 &mgr;mol/g, and an average amount of increased nitrogen in the separator after the separator is immersed in an alkaline aqueous solution having ammonium salt dissolved therein is not less than 140 &mgr;g/g.
摘要:
A washing apparatus and a washing method, which further improve a washing effect and enable highly clean washing with a small amount of chemical. Also, it is an object of the invention to provide a washing apparatus of high throughput involving rapid switching of various chemicals of high responsibility and capable of performing a series of washing operations at high speed. The washing apparatus comprises undiluted cleaning liquid injection means for injecting an undiluted solution or undiluted gas of a cleaning liquid into a ultrapure water channel to make a cleaning liquid of a desired concentration, cleaning liquid supplying means connected to the super demineralized water channel for simultaneously supplying front and rear surface of a substrate with a cleaning liquid adjusted to a desired concentration or a ultrapure water, means for superposing ultrasonic wave or high frequency sound waves of 0.5 MHz or more on the substrate through the cleaning liquid, and means for rotating the substrate or means for moving either of the substrate and the cleaning liquid supplying means in one direction, whereby injection of the undiluted solution or undiluted gas into the ultrapure water channel is controlled to continuously perform washing of the substrate by the cleaning liquid and washing by the ultrapure water.