摘要:
A semiconductor substrate is mounted on a semiconductor alignment apparatus. A chip alignment step is performed to center a central chip on the semiconductor substrate with respect to the semiconductor alignment apparatus, and to store the coordinates thereof. A semiconductor substrate alignment is performed to virtually align the semiconductor substrate with the semiconductor alignment apparatus. At this time, coordinates of a chip adjacent to the central chip and of a number of chips in a peripheral region of the semiconductor substrate are stored in the alignment apparatus. In addition, at least two templates are located in the central chip, and images and coordinates of the templates are stored in the semiconductor alignment apparatus during the semiconductor substrate alignment.
摘要:
The present invention relates to a method of producing an elastomer. Specifically, the method of producing an elastomer according to the present invention comprises a step of polymerizing ethylene, propylene, and optionally, a diene monomer in the presence of a catalyst composition containing a transition metal compound. The method of producing an elastomer according to the present invention makes it possible to prepare a high molecular weight, ethylene-propylene or ethylene-propylene-diene, elastic copolymer at a high temperature.
摘要:
The present invention relates to a preparation method of a superabsorbent polymer, and specifically to a method of preparing a superabsorbent polymer including the steps of: preparing a hydrous gel phase polymer by thermal polymerizing or photo-polymerizing a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying the hydrous gel phase polymer; milling the dried polymer; classifying the milled hydrous gel phase polymer into two or more grades by particle size; adding a surface cross-linking agent to each hydrous gel phase polymer classified into two or more grades; and carrying out a surface cross-linking reaction of the hydrous gel phase polymer to which the surface cross-linking agent is added.
摘要:
An apparatus and method for mitigating inter-cell interference in a macro Base Station (BS) of a wireless communication system having at least one femto cell are provided. The method includes restricting the use of at least one code among at least one available code when forming a beam by resource block, constructing a codebook set for each resource block, when feedback information is received from at least one Mobile Station (MS), allocating a resource to the MS in consideration of the feedback information, determining a weight for forming a beam to the MS in consideration of the codebook set for each resource block and the resource allocated to the MS, and forming the beam to the MS using the weight.
摘要:
A case for a portable electronic device includes an outer cover; a frame attached to an inner surface of the outer cover; a color converting liquid crystal display unit interposed between the outer cover and the frame; and an illumination unit interposed between the color converting liquid crystal display unit and the outer cover. The outer cover is made of a translucent or transparent synthetic resin. The color of the case seen from the outside can be changed by varying the color of the color converting liquid crystal display unit and the appearance or color of the portable electronic device can be expressed by controlling the illumination unit even in an environment in which intensity of illumination is weak, making it possible to provide various aesthetic effects to users.
摘要:
The present invention provides a method for preparing unsaturated aldehydes and/or unsaturated fatty acids from olefins using a fixed-bed catalytic partial oxidation reactor, in particular, a start-up method upon packing with catalysts and initiating the reaction, and a process for producing unsaturated aldehydes and/or unsaturated fatty acids with high yield.
摘要:
A green optical module is disclosed. The module includes a harmonic generator for generating a second harmonic, a laser light source for generating light for pumping the harmonic generator and at least two heat sinks spaced from each other. The harmonic generator and the laser light source are disposed on upper surfaces of the heat sinks, respectively.
摘要:
An optically pumped semiconductor laser and an optical pumping method are disclosed. The optically pumped semiconductor laser includes an output mirror and a reflective mirror for forming a resonant region therebetween, a gain medium disposed between the output mirror and the reflective mirror and a light source for applying a source light in a direction between the output mirror and the gain medium to activate the gain medium, whereby the optical axes of the light from the source light and the light generated from the gain medium are substantially perpendicular to each other and the optical axes of a second harmonic generated from a nonlinear crystal is substantially equal to the optical axis of the light generated from the gain medium.
摘要:
A drug testing system using a liver-slice culture apparatus. The apparatus has a chamber with plasma and gas valves, animal liver slices being positioned securely in the chamber so as to maximize the surface area of liver slices exposed to the culture medium. Plasma is supplied to the chamber so that it rises to contact the liver slices, and is alternately removed from contacting the liver slices. Gas is supplied to the top of the chamber. The system also includes a reservoir for containing media entering and exiting the chamber. Methods are provided for assessing the toxicity of a drug or drug candidate.
摘要:
The present invention relates to a method of preparing a superabsorbent polymer, including the steps of: preparing a hydrous gel phase polymer by thermal polymerizing or photo-polymerizing a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying the hydrous gel phase polymer; milling the dried polymer; adding a surface cross-linking agent to the milled polymer; and elevating the temperature of the polymer including the surface cross-linking agent at a speed of 3° C./min to 15° C./min, and carrying out a surface cross-linking reaction at 100° C. to 250° C.