Patent application number | Description | Published |
20080270050 | TEST SYSTEM AND FAILURE PARSING METHOD THEREOF - A test system and a failure parsing method. The test system may comprise a cell array including defective cells formed according to various failure causes, a test apparatus configured to measure electric characteristics from the defective cells and make the measured electric characteristics numerical, and a database apparatus configured to store the numerical electric characteristics. The failure parsing method may include forming defective cells to have at least one failure cause, measuring electric characteristics of each of the defective cells, storing the measured electric characteristics of each of the defective cells in a database, and judging failure causes of a failed chip of a semiconductor wafer based on the database. | 10-30-2008 |
20090072496 | Gasket for reducing stress concentration in fuel cell stack - The present invention provides a gasket for reducing stress concentration in a fuel cell stack, which prevents damage or deformation of a separator and further prevents a position shift of the gasket by reducing stress concentration formed at a specific region by deformation of the gasket due to a compression force. | 03-19-2009 |
20090209668 | REINFORCED COMPOSITE MEMBRANE FOR POLYMER ELECTROLYTE FUEL CELL - The present invention relates to a method of manufacturing a proton-conducting reinforced composite membrane, and more particularly, to a reinforced composite membrane which is manufactured by introducing an additive into a sulfonated hydrocarbon-based polymer as a proton-conducting material, and impregnating the additive-introduced polymer into a porous polymer having excellent dimensional stability. | 08-20-2009 |
20090286112 | METHOD FOR ACCELERATING ACTIVATION OF FUEL CELL - The present invention provides a method for accelerating activation of a fuel cell, which can significantly reduce the time required for the activation of the fuel cell and the amount of hydrogen used and facilitate the activation of the fuel cell. | 11-19-2009 |
20090311574 | FUEL CELL BIPOLAR PLATE AND METHOD FOR MANUFACTURING THE SAME - The present invention provides a fuel cell bipolar plate and a method for manufacturing the same, in which a carbon or metal fuel cell bipolar plate is surface-treated with a complex transition metal oxide, which is a main component of a variable resistance heating element having a negative temperature characteristic, so that the bipolar plate can ensure a sufficient amount of heat, required to prevent product water from freezing, by itself in a short time without any external energy, thus improving cold start performance of a fuel cell vehicle at a temperature below zero. | 12-17-2009 |
20100040913 | APPARATUS AND METHOD FOR DETERMINING DETERIORATION OF A FUEL CELL AND METHOD FOR PREVENTING DETERIORATION OF THE SAME - The present invention provides an apparatus and method for determining deterioration of a fuel cell, the method including measuring in real time fluoride ion concentration or pH value of outflow water from a fuel cell stack during operation in a fuel cell vehicle, calculating a fluoride emission rate from the measured value and, if the calculated fluoride emission rate is out of a predetermined normal range, determining deterioration of an electrolyte membrane of the fuel cell stack. | 02-18-2010 |
20100143758 | FUEL CELL BIPOLAR PLATE FOR PREVENTING FLOODING - The present invention provides a fuel cell bipolar plate in which an air gap or a material layer having a heat transfer coefficient lower than that of the bipolar plate is provided so as to reduce total amount of liquid water generated in a fuel cell, thereby preventing the occurrence of flooding and reducing the time required for cold start, enhancing durability, decreasing parasitic purge requirements, and enhancing operational stability. | 06-10-2010 |
20100150378 | METHOD AND APPARATUS FOR AUDIO SIGNAL CONTROL - An audio signal control method and apparatus for hearing protection are disclosed. The audio signal control method includes: producing an output level of an audio signal being input; determining whether the ratio of an output time of the audio signal within a preset time duration to a permissible time corresponding to the produced output level is greater than or equal to a limit reference value; and limiting, when the ratio of the output time to the permissible time is greater than or equal to the limit reference value, the output level of the audio signal to a preset level. | 06-17-2010 |
20100196743 | APPARATUS AND METHOD FOR PURGING RESIDUAL WATER AND HYDROGEN DURING SHUTDOWN OF FUEL CELL - The present invention provides an apparatus and method for purging residual water and hydrogen during shutdown of a fuel cell, which can reduce the time required for purging residual water and hydrogen during shutdown of a fuel cell by opening and closing outlet lines of an anode and a cathode in a short period of time using solenoid valves. | 08-05-2010 |
20100279206 | Sealing structure of fuel cell separator - The present invention provides a sealing structure of a sealing portion for maintaining the airtightness of a coolant passage in two stacked separators of a fuel cell, wherein a groove in which an adhesive is to be filled is formed on a surface of one of two separators, and dam portions are formed on both sides of the groove to prevent the adhesive applied in the groove from overflowing into a connection passage and a coolant passage. Accordingly, the adhesive overflowing from the groove when the two separators are bonded to each other by applying a pressure is collected in the dam portions to form three sealing lines, thus improving the airtightness of the sealing portion. Moreover, it is possible to solve the problem that the performance of the fuel cell stack is deteriorated when an antifreeze/coolant leaks from the coolant passage to an MEA, in which the fuel cell reaction takes place, or the leaking coolant contaminates a catalyst of the MEA. | 11-04-2010 |
20100320596 | METHOD FOR FABRICATING SEMICONDUCTOR PACKAGE AND SEMICONDUCTOR PACKAGE USING THE SAME - Provided is a method for fabricating semiconductor package and a semiconductor package fabricated using the same. The method for fabricating semiconductor package dopes a mixture including the polymer material and the solder particle on the substrate in which the terminal is formed and applies heat, and thus the solder particle flows (or diffuses) toward the terminal in the heated polymer resin to adhere to the exposed surface of the terminal, i.e., the side surface and upper surface of the terminal, thereby forming the solder layer. The solder layer improves the adhesive strength between the terminal of the semiconductor chip and the terminal of the substrate in the subsequent flip chip bonding process. | 12-23-2010 |
20110018670 | ELECTRONIC DEVICE INCLUDING LTCC INDUCTOR - Provided is an electronic device that includes an LTCC inductor including a first sheet disposed on a substrate and including a first conductive pattern, a second sheet disposed on the first sheet and including a second conductive pattern, and a via electrically connecting the first conductive pattern to the second conductive pattern, and a spacer disposed on a lower surface of the first sheet to provide an air gap between the substrate and the first sheet, wherein the first conductive pattern is exposed out of the lower surface of the first sheet. | 01-27-2011 |
20110115036 | DEVICE PACKAGES AND METHODS OF FABRICATING THE SAME - Provided is a method for fabricating a device package. The method includes: preparing a substrate where respectively corresponding device structures and input and output pads are disposed on an active surface; preparing a carrier substrate where a metal lid corresponding to the device structure is disposed on one surface; and contacting the active surface of the substrate with the metal lid of the carrier substrate to cover and seal the device structure corresponding to the metal lid. | 05-19-2011 |
20130114471 | AMPLIFIER SUPPORTING MULTI MODE AND AMPLIFYING METHOD THEREOF - An amplifier and an amplifying method are provided. The amplifier includes: an amplifying unit amplifying and transferring a transmission target signal to a TDD switch; the TDD switch transferring a signal received from the amplifying unit to a filter unit when the amplifier operates in a TDD mode, and transferring a signal received from the filter unit to a duplex mode selection switch; the duplex mode selection switch transferring a signal received from the filter unit to a receiving side; and a controller controlling the duplex mode selection switch to transfer the signal received from the filter unit to the receiving side without passing through the TDD switch when the received duplex mode selection signal is a FDD mode selection signal. | 05-09-2013 |
20140254838 | METHOD AND APPARATUS FOR CONTROLLING AUDIO OUTPUT OF COMMUNICATION TERMINAL - An apparatus for controlling an audio output in a terminal includes: a speaker; an audio processor which demodulates an audio signal via a first path and a second path having different impedances from each other, the audio processor selectively transmits the demodulated audio signal to the speaker via one of the first path and the second path; and a controller which determines an audio output mode and controls a path selection of the audio processor according to the determined audio output mode. | 09-11-2014 |