Abstract:
Described is a semiconductor device which includes a channel layer on a substrate, cell trench patterns in the channel layer, and a source pattern on the cell trench patterns. The source pattern includes a groove in the channel layer, between the cell trench patterns, with inclined sidewalls and a horizontal bottom surface, source regions which are located on the lower sides of the inclined sidewalls of the groove, source isolation regions which are located on the lower sides of the bottom surface of the groove, and a source electrode which fills the groove and has a top surface which is planar.
Abstract:
Proposed are a polymer represented by the following formula 1, a preparing method thereof, a composite membrane and an electrode including the same, and a fuel cell including the same. In formula 1, R_1-R_13 and Ar_1 are the same as described in detailed description.
Abstract:
An interface method of mobile terminal according to the present invention includes: a step for receiving and storing in order of time two or more types of messages related to two or more types of first applications; a step for integrating and constructing the two or more types of messages through a second application which integrates and manages the two or more types of fist applications; and a step for displaying the two or more types of messages with type information of each message through the second application.
Abstract:
PURPOSE: A composition is provided to provide a composite film with improved mechanical strength, thereby manufacturing a fuel cell with improved durability. CONSTITUTION: A composition comprises one or more compounds represented by chemical formula 1, and a crosslinkable compound. In the chemical formula 1: a is 0, 1, or 2; R is hydrogen, a substituted or unsubstituted C1-40 alkyl group, a substituted or unsubstituted C1-40 alkoxy group, a substituted or unsubstituted C2-40 alkenyl group, a substituted or unsubstituted C2-40 alkynyl group, a substituted or unsubstituted C6-40 aryl group, a substituted or unsubstituted C6-40 aryloxy group, a substituted or unsubstituted C2-40 heteroaryl group, a substituted or unsubstituted C2-40 heteroaryloxy group, a substituted or unsubstituted C4-40 cyclic carbon group, a substituted or unsubstituted C4-40 cyclic carbon oxy group, a substituted or unsubstituted C2-40 hetero cycle group, halogen, a hydroxyl group, or a cyano group.
Abstract:
PURPOSE: An electrode catalyst for fuel cells, a manufacturing method thereof, catalyst and membrane electrode assembly including the same, and a fuel battery are provided to provide excellent catalyst activities and stabilities at the same time. CONSTITUTION: An electrode catalyst for fuel cells comprises catalyst particles. The catalyst particle comprises a plurality of palladium atoms, a plurality of transition metal atoms and a plurality of precious metal atoms having the standard reduction potential higher than the standard reduction potential of the transition metals. Each transition metal atom is surrounded by one or more palladium atom, other transition metal atom which is located near, and the precious metal atom. The transition metal is one or more metals selected from titanium(Ti), vanadium(V), chrome(Cr), manganese(Mn), iron(Fe), cobalt(Co), nickel(Ni), copper (Cu) and zinc(Zn).
Abstract:
PURPOSE: A method for booting a computing system is provided to optimize the size of a snapshot boot image despite an increase of the sizes of an operating system and a software stack, thereby reducing the size of a boot image which is loaded during booting. CONSTITUTION: A processor(100) records a device initialization code in an IRAM. The processor records a boot image necessary for booting a computing system by control of a DMA(Direct Memory Access) controller(120) in a main memory. The processor initializes a device necessary for booting the computing system using the recorded device initialization code. The processor executes the recorded boot image.
Abstract:
PURPOSE: A composite is provided to manufacture an electrode catalyst having excellent electronic conductance, large surface area, and mesopores. CONSTITUTION: A composite comprises a metal, nitrogen, and carbon which have oxygen reductive activity, and has polyhedrally shaped particles. The manufacturing method of the composite comprises: a first step of obtaining a composition by mixing a metal salt, and a nitrogen-containing organic compound; and a second step of obtaining porous material, which contains oxygen reduction reactive metal-nitrogen-containing organic compounds, by mixing the composition; and a third step of heat treating a porous material containing the oxygen reduction reactive metal-nitrogen-containing organic compounds.
Abstract:
PURPOSE: An electrode catalyst for a fuel cell is provided to improve stability by including palladium and iridium instead of platinum and efficiency by activating an oxygen-reduction reaction. CONSTITUTION: A method for preparing an electrode catalyst for a fuel cell comprises a step of mixing a palladium(Pt) precursor, iridium(Ir) precursor and metal(M) precursor with a solvent to obtain a composition for forming the electrode catalyst; adjusting the pH of the mixture; performing a reduction reaction of the mixture; washing and drying the reduced product; and heat treating the resultant.