摘要:
The method of manufacturing a recess type MOS transistor improves a refresh characteristic. In the method, a channel impurity region is formed by ion implanting a first conductive impurity in an active region of a semiconductor substrate. Thereon, a second conductive impurity and the first conductive impurity are ion-implanted each alternately into the active region, to thus sequentially form first to third impurity regions having a dual diode structure on the channel impurity region, the second conductive impurity having conductivity opposite to the first conductive impurity. A trench is formed, and a gate insulation layer is formed in a gate region to produce a gate stack. The first conductive impurity is selectively ion-implanted in a source region, to thus form a fourth impurity region. A spacer is then formed in a sidewall of the gate stack, and the second conductive impurity is ion-implanted in the source/drain regions, to form a fifth impurity region.
摘要:
According to some embodiments of the invention, transistors of a semiconductor device have a channel region in a channel-portion hole. Methods include forming embodiments of the transistor having a channel-portion hole disposed in a semiconductor substrate. A channel-portion trench pad and a channel-portion layer are sequentially formed at a lower portion of the channel-portion hole. A word line insulating layer pattern and a word line pattern are sequentially stacked on the channel-portion layer and fill the channel-portion hole, disposed on the semiconductor substrate. The channel-portion layer is formed to contact the semiconductor substrate through a portion of sidewall of the channel-portion hole, and forms a channel region under the word line pattern. Punchthrough is prevented between electrode impurity regions corresponding to source and drain regions.
摘要:
The present invention relates to a method for forming an electron emission source for an electron emission device and an electron emission device produced by the method. The method for forming an electron emission source comprises: depositing at least one kind of charged particles selected from the group consisting of carbon-based materials, metal particles, inorganic particles, and organic materials to a substrate charged by the opposite charge. The method provides an electron emission source for an electron emission device upon which carbon nanotubes are selectively deposited in a desired pattern without leaving surplus organic carbon. The resulting electron emission devices exhibit excellent life and electron emission characteristics. The method does not require additional surface treatment.
摘要:
a A MOS (metal oxide semiconductor) transistor with a trench-type gate is fabricated with a channel stopping region for forming an asymmetric channel region for reducing short channel effects. For example in fabricating an N-channel MOS transistor, a gate structure is formed within a trench that is within a P-well. A channel stopping region with a P-type dopant is formed to a first side of the trench to completely contain an N-type source junction therein. An N-type drain junction is formed within a LDD region to a second side of the trench, thus forming the asymmetric channel region.
摘要:
Disclosed is a receiver digital filter for a digital IF signal processor suitable for the specification of each communication standard in a communication system that supports at least one communication standard. The filter for each standard is constructed as one block, and includes a block for externally implementing the constructed block. The coefficient of the digital filter constructed in one block is implemented with an external input or an internal filter coefficient calculator by a basic filter building block. In this manner, the common resources required in the digital filter used in each communication standard are shared, and only the additionally required resources are selectively implemented. Since the shared resources are calculated by dynamic programming, a considerably smaller number of additional resources are required.
摘要:
A latch type sense amplifier having negative feedback means for use in a memory device includes a first switching unit which is turned on/off by an enable signal and initializes a system operation at a turn-on operation; a second switching unit which is turned on/off according to the voltage state of the data on two data lines at the turn-on operation of the first switching unit and performs a system initial operation; a third switching unit which is turned on by a precharge signal and initializes two output signals; a latch unit for latching the data input via the second switching unit according to the operation of the third switching unit and outputting the latched data to two data output units; and a feedback switching unit which is connected to the data output units of the latch unit and the data lines, is turned on/off according to the voltage state of the other data output unit and pulls-up the voltage difference of the bit line connected to corresponding data line by the voltage on corresponding data output terminal at an on operation.