摘要:
Disclosed herein is a cellulose carbide material having a graphite nanosized surface layer directly carbonized from a cellulose fiber, and a method of synthesizing a cellulose carbide material having a graphite nanolayer on a surface thereof, including: i) heating a cellulose fiber in a reactor; ii) forming a primary carbide while maintaining temperature of the reactor; iii) cooling the formed primary carbide; iv) heating the cooled primary carbide; v) forming a secondary carbide while maintaining temperature of the reactor; vi) cooling the formed secondary carbide.
摘要:
A flash memory device can include a memory cell array that includes a plurality of memory blocks, where each of the memory blocks has memory cells arranged at intersections of word lines and bit lines, where ones of the plurality of memory blocks are immediately adjacent to one another and define memory block pairs. The flash memory device can further include a row selection circuit that is configured to drive the word lines responsive to memory operations associated with a memory address, where the row selection circuit can include respective shield lines that are located between the memory blocks included in each pair and each of the memory blocks in the pair has a common source line therebetween.
摘要:
Semiconductor devices and methods of forming devices that have field oxides in trenches are disclosed. According to the methods, a semiconductor substrate is prepared. An upper trench is formed at a predetermined region of the semiconductor substrate and a bottom trench is formed at a bottom surface of the upper trench. A field oxide is formed to fill the bottom trench and the upper trench. At this time, the upper trench has a wider width than the bottom trench.
摘要:
A semiconductor device including a resistor and a method of forming the same. In the semiconductor device, a conductive pattern, which connects source regions, and a resistor are formed of the same material, which can be polysilicon. In the method, the conductive pattern and the resistor are simultaneously formed. Thus, it is possible to obtain a constant sheet resistance without an additional photo mask.
摘要:
A semiconductor memory device having a dummy active region is provided, which includes a plurality of parallel main active regions and a dummy active region coupled to ends of the main active regions. The main preferably active regions are arranged in a main memory cell array region and extend to or through a dummy cell array region surrounding the main memory cell array region. Further, the dummy active region is perpendicular to the main active regions. A redundancy cell array region may intervene between the main memory cell array region and the dummy cell array region. In this case, the main active regions are extended to the dummy cell array region through the redundancy cell array region.
摘要:
A single thermal energy storage tank is used so that costs can be reduced and an installation space can also be reduced compared to a case where two tanks, i.e., a high temperature tank and a low temperature tank are provided. In addition, the single thermal energy storage tank includes a porous block so that passage of molten salt can be more easily performed and flow pressure drop can be reduced. In addition, the porous block is configured by stacking a plurality of unit blocks so that the capacity of the single thermal energy storage tank can be easily adjusted. Furthermore, a plurality of single thermal energy storage tanks are connected in parallel so that the plurality of single thermal energy storage tanks can be selectively used according to an operation load and thus the solar thermal power generation system can easily cope with the operation load.
摘要:
In a reliable semiconductor device and a method of fabricating the semiconductor device, a difference in height between upper surfaces of a cell region and a peripheral region (also referred to as a level difference) is minimized by optimizing dummy gate parts. The semiconductor device includes a semiconductor substrate including a cell region and a peripheral region surrounding the cell region, a plurality of dummy active regions surrounded by a device isolating region and formed apart from each other, and a plurality of dummy gate parts formed on the dummy active regions and on the device isolating regions located between the dummy active regions, wherein each of the dummy gate parts covers two or more of the dummy active regions.
摘要:
A semiconductor device and method of manufacturing a semiconductor device include a plurality of first active regions and a second active region being formed on a substrate. The second active region is formed between two of the first active regions. A plurality of gate structures is formed on respective first active regions. A dummy gate structure is formed on the second active region, and a first voltage is applied to the dummy gate structure.
摘要:
A method and apparatus for receiving and providing disaster information. The method of providing the disaster information includes: classifying a disaster service district into a plurality of emergency zones according to a danger level; transmitting information regarding the plurality of emergency zones to at least one mobile terminal located within the plurality of emergency zones, and receiving a location of the at least one mobile terminal from the at least one mobile terminal; and sequentially transmitting disaster information according to the danger level, to the at least one mobile terminal in the plurality of emergency zones, based on the location of a disaster which has been received from a disaster information server, when a disaster occurs.
摘要:
Disclosed herein are a microtubular honeycomb carbon material obtained by heat-treating cellulose fiber, a production method thereof, a microtubular reactor module fabricated using the microtubular honeycomb carbon, a method for producing the microtubular reactor module, and a microcatalytic reactor system comprising the microtubular reactor module. A carbon material having a new structure is produced by heat-treating cellulose fiber, and a catalytic reactor system having a new structure is constructed by coating the surface of the carbon material with a metal catalyst. Cellulose carbide, used as the reactor material, is very simple to produce. Because it has a micro honeycomb structure having a large number of microchannels and a large number of mesopores, it can be loaded with a large amount of a catalyst compared to the prior material having the same area, and thus it is useful as a catalyst support, and the reaction efficiency can be maximized. Also, the microcatalytic reactor system can be used in applications including very small steam reformer systems that use biomass fuel such as ethanol, fuel cell reactor systems, VOC and low-concentration-hydrogen treatment systems operable below 200□, micro heat exchangers, and natural gas reformer systems. Thus, the invention is a useful, industrially applicable invention.