摘要:
It relates to a method for removing a surfactant, organic materials and chlorine ions remained on the surface of metal nanoparticles, prepared on an organic solvent phase including a surfactant. The method for cleaning metal nanoparticles herein is efficient to remove organic materials or chlorine ions remained on the surface of the nanoparticles. Not less than 90% of impurities may be removed by this method. As a result, the thickness of a multi layer ceramic capacitor (MLCC) can be reduced and a packing factor can be improved so that it allows thinner multi layer ceramic capacitors and improved utilities of metal nanoparticles as fuel cell catalysts, hydrogenation reaction catalysts, alternative catalysts of platinum (Pt) in chemical reactions and the like.
摘要:
Disclosed is a solution for inhibiting palladium activity including an aqueous halogenic acid solution as a pre-treatment solution which may be used before an electroless plating of a printed circuit board to prevent bad plating and a method for preventing bad plating by using the same. More particularly, disclosed is a solution for inhibiting palladium activity including 0.1 to 10 mol of an aqueous halogenic acid solution as a pre-treatment solution which may be used before an ENIG plating or ENEPIG plating of a printed circuit board to prevent bad plating.Disclosed is also a method for preventing bad plating by minimizing defects of shorts between patterns which are caused by plating spreading during the surface treatment of a printed circuit board having fine patterns.
摘要:
A method for fabricating a storage node contact plug of a semiconductor device includes forming an insulation layer over a substrate, etching the insulation layer to form a contact hole, forming a first conductive layer to fill the contact hole, the first conductive layer including a void, etching the first conductive layer to expose the void, forming a second conductive layer to fill the exposed void, and forming a third conductive layer over the second conductive layer.
摘要:
Provided is a method for controlling the size of a dialkoxy magnesium carrier used in preparation of an olefin polymerization catalyst. Specifically, provided is a method for controlling the size of a dialkoxy magnesium carrier for preparation of an olefin polymerization catalyst which includes preparation of a dialkoxy magnesium carrier by reacting metal magnesium with an alcohol in the presence of an reaction initiator such as magnesium halide or nitrogen halide, by adding the metal magnesium and the alcohol to the reaction in divided portion(s) of 1-3.
摘要:
Provided is a preparation method of a catalyst for ethylene (co)polymerization, comprising the following steps: (1) preparing a magnesium compound solution by contact-reacting a halogenated magnesium compound with a mixed solvent of cyclic ether and at least one alcohol; (2) reacting the resulted magnesium compound solution from the above step (1) with a silicon compound having at least one alkoxy group; (3) preparing a support by adding a titanium compound to the resulted product from the step (2); and (4) reacting thus obtained support with a titanium compound and optionally a monoester compound, resulting in a catalyst. Catalysts prepared according to the present invention have a regulated particle shape, and their particle size can be easily adjusted. Therefore, with such catalyst, it is possible to produce polymers having high bulk density at high production yield.
摘要:
A DTV receiver test stream generator which prevents discontinuity phenomenon of a video and an audio, a method for generating the DTV receiver test stream, and a recording medium where the DTV test stream having no discontinuity phenomenon is recorded. To this end, a test stream for a function test or a performance valuation of the DTV receiver is generated and a reproduction time is equalized on the basis of the least common multiple of a video frame time, an audio frame time, and a TS packet time when the test stream is repeatedly reproduced. According to this, when used at a DTV production field where a test pattern is used or at a broadcasting system which repeatedly transmits the DTV stream of a limited length such as a stationary image, a reliability of the DTV receiver test can be ensured.
摘要:
Disclosed is an apparatus for generating an elastic image that includes an interpolation unit configured to generate a first data set using ultrasound images obtained at a maximum pressure and at a minimum pressure; an image generating unit configured to generate a pyramid image using the first data set; a map generating unit configured to generate a motion map using the pyramid image; a displacement calculating unit configured to calculate a displacement based on the motion map; and a display unit configure to display an elastic image using the calculated displacement.
摘要:
Provided is a preparation method of a catalyst for ethylene (co)polymerization, comprising the following steps: (1) preparing a magnesium compound solution by contact-reacting a halogenated magnesium compound with a mixed solvent of cyclic ether and at least one alcohol; (2) reacting the resulted magnesium compound solution from the above step (1) with a silicon compound having at least one alkoxy group; (3) preparing a support by adding a titanium compound to the resulted product from the step (2); and (4) reacting thus obtained support with a titanium compound and optionally a monoester compound, resulting in a catalyst. Catalysts prepared according to the present invention have a regulated particle shape, and their particle size can be easily adjusted. Therefore, with such catalyst, it is possible to produce polymers having high bulk density at high production yield.
摘要:
A turntable device of a microwave oven including: a motor mounted at a lower portion of a cabinet; an arm connected with a rotational shaft of the motor so as to be rotatably moved and having first and second rollers at an end thereof; a first tray disposed to be linearly moved on the bottom of the cabinet and having a slot into which the first roller is inserted; and a second tray disposed to be rotatable on an upper surface of the first tray and having a guide rail into which the second roller is inserted. A heating target received in the cabinet can be rotatably, linearly and reciprocally moved so that the cooking target can be quickly and uniformly heated. In addition, because a relative velocity difference between the first and second rollers does not occur, the first and second trays are prevented from being released.
摘要:
The present invention relates to a shoe having an outsole to form a bottom of the shoe, a mid-sole provided on the top of the outsole, and an insole provided on the top of the mid-sole, contacting the sole of a user's foot, comprising a cushion support part formed with a spring having a predetermined degree of elasticity, to relieve shocks applied to the user's foot; a receiving part formed by depressing one portion of the mid-sole, to receive the cushion support part; an air discharging passage communicating the receiving part with the outside of the outsole, through which partial air of the receiving part is discharged toward the outside of the outsole; and an air check valve provided in the air discharging passage, to prevent air discharged to the outside through the air discharging passage from flowing backward. Thus, the present invention provides shoes capable of improving the feeling of wearing them by effectively relieving the shock power transferred to a user's foot, and enhancing the user's health by discharging air closed within the shoes to the outside through air circulation and removing heat, sweat and stench generated inside the shoes.