摘要:
In an electrolyzer comprising an anode compartment provided with porous anodes, a cathode compartment, and a membrane providing a partition between the anode compartment and the cathode compartment, wherein a solution containing sulfide ions is introduced into the anode compartment, and an aqueous solution containing caustic soda is introduced into the cathode compartment, thereby producing a polysulfide containing polysulfide sulfur through electrolytic oxidation, wherein the anode compartment of the electrolyzer is cleaned with the use, of an aqueous solution containing at least either one of an inorganic acid, a chelating agent, and a scale-cleaning agent, thereby recovering performance of the electrolyzer. Further, when the contents of the anode compartment are replaced with an alkaline aqueous solution containing not more than 0.1 mass % of sulfide ions and not more than 0.1 mass % of carbonate ions upon stopping the electrolytic oxidation, thereby maintaining the performance of the electrolyzer.
摘要:
The present invention has an object to obtain a cooking liquor containing polysulfide-sulfur at a high concentration by minimizing by-production of thiosulfate ions. The present invention is a method for producing polysulfides, which comprises introducing a solution containing sulfide ions into an anode compartment of an electrolytic cell comprising the anode compartment provided with a porous anode, a cathode compartment provided with a cathode, and a diaphragm partitioning the anode compartment and the cathode compartment, for electrolytic oxidation to obtain polysulfide ions, characterized in that the porous anode is disposed so that a space is provided at least partly between the porous anode and the diaphragm, and the apparent volume of the porous anode is from 60% to 99% based on the volume of the anode compartment.
摘要:
A lignocellulose material is cooked by means of an alkaline cooking liquor containing polysulfides in the presence of a quinone-hydroquinone compound, of which the oxidation-reduction potential in the form present during the cooking, which potential is a value calculated as a standard oxidation-reduction potential (Ea) with a hydrogen ion activity of 1, is within a range of from 0.12 to 0.25V to the standard hydrogen electrode potential. It is thereby possible to cook the lignocellulose material with a low Kappa number and in good yield and at the same time, to reduce the amount of the chemical solution used and to reduce the load on a recovery boiler.
摘要:
A portable electronic device in which a pair of housings are coupled and movable between a fully closed state and a fully open state, and electronic components contained in first and second housings are connected by using a flexible lead, the portable electronic device being able to accommodate a bending displacement of the flexible lead in association with relative movement of both housings without providing a large space inside the device. The portable electronic device includes a coupling arm which couples the first and second housing so as to be relatively movable between a fully closed state and a fully open state; a flexible lead includes a belt-like lead portion extending through the inside of the coupling arm; and the coupling arm is formed with a lead accommodating portion for tolerating a bending deformation of the lead portion in association with opening and closing of both the housings.
摘要:
The present invention provides a semiconductor device and a fabrication method therefor, the semiconductor device including a first semiconductor chip disposed on a substrate, a first sealing resin sealing the first semiconductor chip, a built-in semiconductor device disposed on the first sealing resin, and a second sealing resin sealing the first sealing resin and the built-in semiconductor device and covering a side surface of the substrate. According to an aspect of the present invention, it is possible to provide a high-quality semiconductor device and a fabrication method therefor, in which downsizing and cost reduction can be realized.
摘要:
A method for manufacturing a semiconductor device is disclosed. As a part of the method, one surface of a substrate is molded with resin where the substrate and the resin are heated in a first heating process and maintained in a flat condition. The substrate and the resin are returned to room temperature while being maintained in the flat condition after the first heating process. The resin is cut after the substrate and the resin are returned to room temperature from a surface of the resin that is opposite the surface of the resin where the substrate contacts the resin. The substrate is left intact when the resin is cut. Thereafter, the substrate is separated.
摘要:
Structures, methods, and systems for assessing bonding of electrodes in FCB packaging are disclosed. In one embodiment, a method comprises mounting a semiconductor chip with a plurality of first electrodes of a first shape to a mounted portion with a second electrode of a second shape, wherein the second shape is different from the first shape, bonding a respective on of the plurality of first electrodes and the second electrode using a first solder bump, generating an X-ray image of the first solder bump, and determining an acceptability of the bonding of the respective one of the plurality of first electrodes and the second electrode based on the X-ray image of the first solder bump.
摘要:
A stacked type semiconductor device includes semiconductor devices, interposers by which the semiconductor devices are stacked, the interposers having electrodes provided on sides thereof, and a connection substrate connecting the electrodes together. The electrodes provided on the sides of the interposers may be connected to the connection substrate by one of an electrically conductive adhesive or an anisotropically conductive film.
摘要:
The present invention provides that the analysis can be estimated the characteristics of the originated populations which belong to the samples and the characteristics of the samples from sample data. By loading the sample data, by interfering with the second state variable showing the characteristics in the environment system to the first state variable showing the characteristics in the objective system, by converging the variable by selecting the maximum resonant state, and by estimating the characteristics of the samples and the characteristics of the originated populations which belong to the samples, then the result estimated the characteristics of the originated populations is outputted.
摘要:
A carrier structure for fabricating a stacked-type semiconductor device includes: a lower carrier that has laminated thin plates and has first openings for mounting first semiconductor packages thereon; and an upper carrier having second openings for mounting second semiconductor packages on the first semiconductor packages. The lower carrier composed of the laminated thin plates realizes an even plate thickness and reduces warps because stress is distributed to the thin plates. This results in an improved production yield. A pattern of the openings in the thin plates of the lower carrier may be formed by etching or electric discharging. The openings thus formed have reduced warps and burrs.