Abstract: A two-axis geomagnetic sensor is disclosed. The two-axis geomagnetic sensor includes a first geomagnetic sensor part including a first wafer and a first geomagnetic sensor on a surface of the first wafer; and a second geomagnetic sensor part including a second wafer and a second geomagnetic sensor on a surface of the second wafer. The first and second geomagnetic sensor parts are bonded to each other, in which the first and second geomagnetic sensors positioned in an orthogonal relation to each other. Accordingly, an occupancy area of the geomagnetic sensor can be reduced. Further, the geomagnetic sensor on each axe can have the same magnetic material properties, and alignment deviation cannot be generated.

Abstract: A radio frequency (RF) module and a multi RF module including the same include a base substrate, a first element capable of processing RF signals formed on the base substrate, a second element capable of processing RF signals separated from and disposed over the first element, a cap substrate coupled with the base substrate to encapsulate the first and second elements including a plurality of through electrodes that electrically connect the first and second elements to the outside, and a bonding pad that encapsulates and joins the base substrate and the cap substrate and electrically connects the first and second elements to the through electrodes.

Abstract: Provided is a method of manufacturing vinylethylene carbonate. The method includes synthesizing vinylethylene carbonate (VEC) by reaction of 3,4-dihydroxy-1-butene (3,4-DHB) and dialkyl carbonate using a base catalyst, and refining the VEC.

Abstract: A new N-heterocyclic catalyst system which contains N-heterocyclic carbene and amido as ligands, which are strongly bound to a palladium metal. Another heteroatom functionality can be used as a third ligand L. The NHC-amidate ligand system is unique in structure, and shows excellent reactivities in a number of chemical reactions. The chemical reactions include carbon-carbon and carbon-heteroatom (oxygen and nitrogen) bond formations, and oxidation reactions of saturated carbon chemicals via C—H activation.

Abstract: An inductor integrated chip and fabrication method thereof is provided. The inductor integrated chip includes a wafer; an inductor bonded on a surface of the wafer; a circuit element formed on the surface of the wafer and coupled to a first end of the inductor; a packaging wafer connected to the surface of the wafer and packaging the inductor and the circuit element; and a connecting electrode formed on the packaging wafer and connected to a second end of the inductor. The method includes forming an inductor and a circuit element on a surface of a wafer, wherein the circuit element is coupled to a first end of the inductor; forming a connecting electrode on a packaging wafer; and packaging the inductor and the circuit element by joining the wafer and the packaging wafer so as to connect the connecting electrode with a second end of the inductor.

Abstract: A spelling correction system and method automatically recognizes and corrects misspelled inputs in an electronic device with relatively lower computing power. In a learning process, a misspelling correction dictionary is constructed on the basis of a corpus of accepted words, and context-sensitive strings are selected from among all the strings registered in the dictionary. Context information about the context-sensitive strings is acquired. In an applying process, at least one target string is selected from among all the strings in a user's input sentence through the dictionary. If the target string is one of the context-sensitive strings, the target string is corrected by use of the context information.

Abstract: Example embodiments provide a method of fabricating a triode-structure field-emission device. A cathode, an insulating layer, and a gate metal layer may be sequentially formed on a substrate. A first resist pattern having a first opening and a second resist pattern having a second opening smaller than the first opening may be formed to be sequentially laminated on the gate metal layer. Then, the gate metal layer and the insulating layer may be etched using the first resist pattern to form a gate electrode and an insulating layer having a first hole and a second hole corresponding to the first opening. A catalyst layer may be formed on the cathode exposed through the first and second holes using the second resist pattern. After the first resist pattern, second resist pattern, and the catalyst layer on the second resist pattern are removed, an emitter may be formed on the catalyst layer in the second hole.

Abstract: A resonator includes a substrate, and a resonating unit formed on the substrate, and having a lower electrode, a piezoelectric film, and an upper electrode. The lower electrode is formed of at least two layers to adjust a piezoelectric coupling coefficient. The lower electrode includes a first electrode layer and a second electrode layer, which have crystallographic characteristics, particularly, grain sizes or surface roughnesses Ra, different from each other, respectively. The first and the second electrode layers are formed to have a predetermined thickness ratio to each other.

Abstract: A coupled resonator filter and a method of fabricating the coupled resonator filter are provided. The method includes: sequentially stacking a first electrode, a first piezoelectric layer, a second electrode, an insulating layer, a third electrode, a second piezoelectric layer, and a fourth electrode on a surface of a substrate; sequentially patterning the first electrode, the first piezoelectric layer, the second electrode, the insulating layer, the third electrode, the second piezoelectric layer, and the fourth electrode to expose areas of the first, second, and third electrodes; forming a plurality of connection electrodes respectively connected to the exposed areas of the first, second, and third electrodes and an area of the fourth electrode; and etching an area of the substrate underneath the first electrode to form an air gap.

Abstract: Provided are a perpendicular magnetic recording head and a method of manufacturing the same. The perpendicular magnetic recording head includes a main pole including a pole tip applying a recording magnetic field to a recording medium, a coil surrounding the main pole in a solenoid shape such that recording magnetic field for recording information to a recording medium is generated at the pole tip, and a return yoke forming a magnetic path for the recording magnetic field together with the main pole and surrounding a portion of the coil passing above the main pole. The number of times that the coil passes above the main pole is smaller than the number of times that the coil passes below the main pole.

Abstract: A wafer level package includes a device wafer having a micro device, and bonding pads which are connected to the micro device, and formed at one surface of the device wafer, via connectors extending from the bonding pads to the other surface of the device wafer, external bonding pads formed at the other surface of the device wafer and connected to the bonding pads through the via connectors, and a cap structure bonded to one surface of the device wafer so as to allow the micro device to be insulated and hermetically sealed.

Abstract: A device, computer program product and method of inputting a character in a touch screen device, in which a touch area is partitioned into a plurality of array positions, and one or more letters are assigned to each of the partitioned array positions. The method comprises the steps of: partitioning a touch area of the touch panel into a plurality of array positions and assigning one or more characters to each of the partitioned array positions; sensing an expansion event of selecting one among the array positions; dividing the touch area into a plurality of selection positions and assigning the characters assigned to the array position selected by the expansion event to the respective selection positions; sensing a selection event of selecting one among the selection positions; and recognizing the character assigned to the selection position selected by the selection event as an input character.

Abstract: An audio data player may include a storage unit for storing one of more sound source files containing tag information, and an extraction unit for extracting one piece of information among the tag information (e.g., information on artist, album, title, year, genre, and user preference) of the stored sound source files. A control unit may provide the tag information of each sound source file extracted by the extraction unit in the form of a list, receiving one element of the provided list, and create a playback list.

Abstract: A duplexer which prevents effects between transmitter and receiver filters. The duplexer include a substrate, a transmitter filter fabricated in a predetermined first area on a surface of the substrate, a receiver filter fabricated in a predetermined second area on the surface of the substrate and an air cavity fabricated in an area between the predetermined first and second areas by etching the substrate to isolate the transmitter and receiver filters from each other. The air cavity is fabricated in the substrate perpendicular to directions along which the transmitter and receiver filters are disposed. Accordingly, physical effects among elements can be effectively intercepted.

Abstract: A perpendicular magnetic recording head and a method of manufacturing the same are provided. The perpendicular magnetic recording head that includes a main pole, a return yoke, and coils that surround upper and lower parts of the main pole in a solenoid shape so that the main pole generates a magnetic field for recording information onto a recording medium, wherein a portion of the coils that pass above the main pole comprises a plurality of first coils and at least one second coil having a cross-sectional shape different from that of the first coils, and the second coil is formed across upper regions of two first coils adjacent to each other among the first coils.

Abstract: A resonator includes a substrate, and a resonating unit formed on the substrate, and having a lower electrode, a piezoelectric film, and an upper electrode. The lower electrode is formed of at least two layers to adjust a piezoelectric coupling coefficient. The lower electrode includes a first electrode layer and a second electrode layer, which have crystallographic characteristics, particularly, grain sizes or surface roughnesses Ra, different from each other, respectively. The first and the second electrode layers are formed to have a predetermined thickness ratio to each other.

Abstract: A resonator including a substrate, and a resonating unit having an active region that causes resonances and a non-active region that does not cause resonances, and having a first electrode, a piezoelectric film, and a second electrode layered in turn on the substrate. At least one of the first and the second electrodes is formed, so that at least a portion of a non-active region portion thereof has a thickness different from that of an active region portion thereof.

Abstract: A two-axis geomagnetic sensor is disclosed. The two-axis geomagnetic sensor includes a first geomagnetic sensor part including a first wafer and a first geomagnetic sensor on a surface of the first wafer; and a second geomagnetic sensor part including a second wafer and a second geomagnetic sensor on a surface of the second wafer. The first and second geomagnetic sensor parts are bonded to each other, in which the first and second geomagnetic sensors positioned in an orthogonal relation to each other. Accordingly, an occupancy area of the geomagnetic sensor can be reduced. Further, the geomagnetic sensor on each axe can have the same magnetic material properties, and alignment deviation cannot be generated.

Abstract: A radio frequency (RF) module and a multi RF module including the same include a base substrate, a first element capable of processing RF signals formed on the base substrate, a second element capable of processing RF signals separated from and disposed over the first element, a cap substrate coupled with the base substrate to encapsulate the first and second elements including a plurality of through electrodes that electrically connect the first and second elements to the outside, and a bonding pad that encapsulates and joins the base substrate and the cap substrate and electrically connects the first and second elements to the through electrodes.

Abstract: The present invention relates to a WLP fabrication method capable of welding a lid wafer with a device wafer by using laser illumination. The WLP fabrication method can rapidly weld bonding metal strips of device and lid wafers with each other in order to couple the lid wafer with the device wafer while sealing an internal cavity from the outside without giving any thermal effect to a drive unit in the device wafer.