摘要:
The present invention relates to a hydrothermal synthesis for preparing barium titanate powder as the essential material for a multi-layer ceramic capacitor. The object of the invention is to prepare barium titanate powder having high purity, particle size of submicron order, uniform particle distribution and excellent crys tallinity , by reacting hydrous titanic acid compound prepared via sulfuric acid process with crystalline titanium oxide and barium hydroxide, as the starting material, at a temperature between 60° C. and 300° C. under a pressure between 5 Kgf/cm2 and 50 Kgf/cm2. The process for preparing barium titanate according to the present invention provides barium titanate powder having Ba/Ti molar ratio of 1.000±0.002 and high purity by applying calcination under reductive condition to the solid product obtained from hydrous titanic acid compound prepared via sulfuric acid process with crystalline titanium oxide and barium hydroxide, as the starting substances, to convert barium sulfate, which was produced from residual sulfide in the raw material, to barium titanate.
摘要:
A BiDMOS device in which a bipolar transistor and a DMOS transistor are formed on the same substrate, thereby resulting in a high degree of integration, and a method of fabricating the same using a reduced number of process steps. A high voltage operating characteristic is achieved because the gate of the DMOS transistor isolates the base and collector of the bipolar transistor. In addition, the junction capacitance between the bipolar base and collector regions is considerably reduced due to the isolation provided by the DMOS gate polysilicon.
摘要:
A method and apparatus for stably encoding/decoding data, and a method and apparatus for recording/reproducing data are disclosed. The method inserts decoding information into a data section including several predetermined-bit data, determines encoding values of the data according to a transition state of the data and a value of corresponding data, and generates the decoding information and the determined encoding values in units of the data section.
摘要:
Disclosed herein is a monoblock dielectric multiplexer capable of processing multi-band signals. The monoblock dielectric multiplexer includes a dielectric block implemented as a hexahedral dielectric forming a body of the monoblock dielectric multiplexer. An external electrode is applied to an external surface of the dielectric block except for to a top surface. Resonant holes are each formed in a cylindrical shape and formed through the top surface and a bottom surface of the dielectric block. Internal electrodes are respectively formed on inner walls of the resonant holes. A plurality of capacitance patterns is formed on the top surface of the dielectric block and is configured to surround corresponding resonant holes. Input/output electrode units are formed and spaced apart from the capacitance patterns and configured to form capacitance coupling to the capacitance patterns. A collation antenna stage is formed in a center portion of the dielectric block.
摘要:
Provided are an RFID operating system and an RFID system operating method for allowing multiple RFID readers to read tags without collision. The RFID system operating method includes the steps of grouping RFID readers spaced apart by more than a spacing distance capable of avoiding collision between RFID readers into a single group to determine at least one group, classifying RPM readers included in each group into at least one sub-group based on a read time of each RFID reader, and driving the RFID readers such that RPM readers belonging to at least two different sub-groups that do not collide with each other simultaneously operate. According to the present invention, switching is performed sub-group by sub-group to reduce the number of switching operations and sub-groups can simultaneously operate to decrease a read time.
摘要:
Provided are a photographing control method and apparatus according to motion of a digital photographing apparatus. The photographing control method may prevent inconvenience when a subject is photographed while changing a viewing angle by using an additional zoom button, by sensing predetermined motion via a motion sensor comprised in the digital photographing apparatus and calculating a first motion value; comparing the calculated first motion value to predetermined threshold values; and controlling a zoom lens to be driven in a predetermined direction according to a result of the comparing.
摘要:
A method and apparatus for stably encoding/decoding data, and a method and apparatus for recording/reproducing data are disclosed. The method inserts decoding information into a data section including several predetermined-bit data, determines encoding values of the data according to a transition state of the data and a value of corresponding data, and generates the decoding information and the determined encoding values in units of the data section.
摘要:
A BiCMOS device and a manufacturing method thereof according to the present invention has a gate insulating layer of NMOSFET having non-uniform thickness. The thickness of the end portion of the gate insulating layer, which is near LDD regions, is thicker than that of center portion. Therefore, the GIDL and the gate-drain overlap capacitance is reduced. In addition, in case of the bipolar transistor of the BiCMOS device, there exists a portion of an oxide film below the side portion of the emitter polysilicon and over the side portions of the emitter region. Since this structure serves as a gate of field effect transistor, N- channel is produced in the emitter region when the emitter-base junction is reversely biased and thus the hot carrier reliability is improved.
摘要:
Methods of forming BiCMOS semiconductor devices include steps for forming bird's beak shaped oxide extensions between the gate electrodes and drain and source regions of CMOS devices to inhibit drain leakage currents and reduce gate-to-drain capacitance. These methods also include steps for forming bird's beak shaped oxide extensions at the emitter-base junctions of BJTs to reduce hot carrier induced P-N junction breakdown. A preferred method includes the steps of forming a gate electrode of a field effect transistor on a face of a semiconductor substrate and then forming self-aligned source and drain regions in the substrate using the gate electrode as a mask. A first conductive layer is then formed on the source and drain regions and used to diffuse dopants into the source and drain regions to increase the conductivity therein. Simultaneously with this diffusion step, the ends of the gate electrode and the first conductive layer are oxidized to form first bird's beak shaped oxide extensions between the gate electrode and the source and drain regions. These first bird's beak shaped oxide extensions are preferably formed to reduce drain leakage currents and gate-to-source capacitance by, among other things, reducing the electric field between the drain-side end of the gate electrode and the drain region. The first conductive layer can also be etched back into discrete intermediate source and drain contact regions to facilitate the subsequent formation of source and drain electrodes in electrical contact with the source and drain regions. Similar steps can also be performed to simultaneously form bipolar junction transistors adjacent the field effect transistors.
摘要:
A digital photographing apparatus includes a handshake correction module and a method of controlling the digital photographing apparatus. As a first image and a second image that is input by minutely adjusting a photographing direction from the first image are captured by using a pre-mounted handshake correction module, the second image that is accurately continuous from the first image may be obtained. As such, highly reliable panorama shooting may be enabled and an ultra-wide-angle image having a viewing angle greater than that of a currently mounted lens may be obtained without exchanging the currently mounted lens for an expensive lens used in wide-angle shooting.