Patent application number | Description | Published |
20080284540 | ANTENNA DUPLEXER - An antenna duplexer is provided, which can be built with a smaller size and lower height than ever without compromising out-of-band attenuation characteristic and isolation characteristic between a transmit terminal and a receive terminal. The antenna duplexer includes a transmit filter provided between an antenna terminal and the transmit terminal, and a receive filter provided between the antenna terminal and the receive terminal. The filters are enclosed by a package, in which a ground pattern for the receive filter is separated from other ground patterns. | 11-20-2008 |
20080284543 | PIEZOELECTRIC THIN-FILM RESONATOR AND FILTER - A piezoelectric thin-film resonator includes: a lower electrode that is formed on a substrate; a piezoelectric film that is formed on the substrate and the lower electrode; an upper electrode that is formed on the piezoelectric film, with a portion of the piezoelectric film being interposed between the lower electrode and the upper electrode facing each other; and an additional film that is formed on the substrate on at least a part of the outer periphery of the lower electrode at the portion at which the lower electrode and the upper electrode face each other, with the additional film being laid along the lower electrode. | 11-20-2008 |
20090002880 | INFORMATION STORAGE APPARATUS - An information storage apparatus includes: at least one information storage medium each of which is in a disk-like shape, rotates being fixed to a common rotating shaft and in which information is recorded; a head which accesses the information storage medium by approaching or touching the information storage medium; an arm which extends along a surface of the storage information medium, holds the head at an end of the arm, and swings around a pivot shaft disposed at a root of the arm; and a spoiler which rectifies airflow on the information storage medium and includes a metal airflow control plate and a resin bracket which holds the airflow control plate at a predetermined position along the surface of the information storage medium. | 01-01-2009 |
20090034889 | FLUID DYNAMIC BEARING, FLUID DYNAMIC BEARING-TYPE DISC DRIVE, AND METHOD OF MANUFACTURING FLUID DYNAMIC BEARING - In a disclosed fluid dynamic bearing motor, and a disc drive employing the same, variations in motor performance due to a change in viscosity of a bearing fluid caused by a temperature change is canceled. The fluid dynamic bearing includes a sleeve with a shaft insertion hole in it. A shaft is rotatably inserted into the shaft insertion hole. A bearing fluid is disposed between an internal surface of the shaft insertion hole and the shaft. The shaft is formed of a material selected from a group consisting of steel, iron alloy material, aluminum alloy material, and copper alloy material. The sleeve is made of titanium material. | 02-05-2009 |
20090201104 | ACOUSTIC WAVE DEVICE, DUPLEXER, COMMUNICATION MODULE, AND COMMUNICATION APPARATUS - An acoustic wave device includes a ladder-type filter in which resonators are connected in a ladder configuration. In the acoustic wave device, series-connected resonators are connected in a parallel line in the ladder-type filter, and the resonators connected in the parallel line have mutually different resonance frequencies. | 08-13-2009 |
20090206706 | PIEZOELECTRIC THIN-FILM RESONATOR - There is provided a piezoelectric thin-film resonator including a substrate, a lower electrode disposed on the substrate, a piezoelectric film disposed on the lower electrode, an upper electrode disposed on the piezoelectric film in such a manner that a portion of the upper electrode is opposed to the lower electrode, and a mass element disposed on the upper electrode in a portion of an edge of the region of the upper electrode in which the upper electrode and the lower electrode are opposed to each other. | 08-20-2009 |
20090273408 | FILTER DUPLEXER AND COMMUNICATION DEVICE - A filter has a filter section that is provided with a balanced input terminal including a terminal | 11-05-2009 |
20100019864 | FILM BULK ACOUSTIC RESONATOR, FILTER, COMMUNICATION MODULE AND COMMUNICATION DEVICE - There is provided a film bulk acoustic resonator which has a substrate, a lower electrode formed on the substrate, a piezoelectric membrane formed on the lower electrode, an upper electrode formed on the piezoelectric membrane, and an insulating film disposed adjacent to the piezoelectric membrane between the upper electrode and the substrate and at a position at which the upper electrode and the substrate are opposed each other. The substrate is preferably formed so as to form a void at a portion facing to the lower electrode. The lower electrode has preferably a tapered end and a part of the boundary between the piezoelectric membrane and the insulating film is disposed on an inside from the upper end of the tapered end. | 01-28-2010 |
20100019866 | ACOUSTIC WAVE DEVICE, METHOD OF MANUFACTURING ACOUSTIC WAVE DEVICE AND TRANSMISSION APPARATUS - An acoustic wave device includes a substrate and a plurality of piezoelectric thin film resonators formed over the substrate. Each of the plurality of the piezoelectric thin film resonators includes lower electrode provided on the substrate, a piezoelectric film provided on the lower electrode, and an upper electrode provided on the piezoelectric film and opposed to the lower electrode through the piezoelectric film. Each of the piezoelectric thin film resonators is partly supported by the substrate and extends above the substrate to form a cavity between the substrate and each lower electrodes. The cavity continuously extending under the plurality of the piezoelectric thin film resonators. | 01-28-2010 |
20100026414 | FILTER, DUPLEXER, AND COMMUNICATION APPARATUS - A filter includes: a first filter unit includes: a series resonators connected in series to each other between a first input terminal and a first output terminal; a parallel resonators each having one end connected to one terminal of each of the series resonators; and a common inductance having one end connected to the other ends of the parallel resonators and the other end connected to a ground terminal, and a second filter unit includes: a series resonators connected in series to each other between a second input terminal and a second output terminal; a parallel resonators each having one end connected to one terminal of each of the series resonators; and a common inductance having one end connected to the other ends of the parallel resonators and the other end connected to the ground terminal. | 02-04-2010 |
20100026419 | FILTER, BRANCHING FILTER AND COMMUNICATION APPARATUS - A filter includes: a converter circuit, provided with a single-type common terminal and two balanced terminals, for performing conversion between a balanced line and an unbalanced line; two filter units coupled to each of the balanced terminals of the converter circuit and allowing passage of a signal in a pass band; and a bridging capacitor arranged to extend across the converter circuit and one of the filter units in a bridging manner, wherein the inductance of an opposite-side line of one of the filter units relative to the converter circuit is electromagnetically coupled to the inductance of a line coupling the other filter unit and the converter circuit. | 02-04-2010 |
20100033063 | PIEZOELECTRIC THIN0FILM RESONATOR, FILTER USING THE SAME, AND DUPLEXER USING THE SAME - A piezoelectric thin film resonator includes a substrate, a lower electrode formed on the substrate, a piezoelectric film formed on the lower electrode, and an upper electrode formed on the piezoelectric film, the lower electrode and the upper electrode opposing each other through the piezoelectric film to form an opposing region, the opposing region including a space at a boundary of the opposing region. The space extends from an innerside to an outer side of the opposing region and is formed in or on the piezoelectric film. | 02-11-2010 |
20100060384 | FILTER, DUPLEXER AND COMMUNICATION APPARATUS - A filter has a plurality of piezoelectric thin film resonators formed by sandwiching a piezoelectric film with a lower electrode disposed on a substrate and an upper electrode. Each of the piezoelectric thin film resonators has an electrode region formed with the upper electrode and the lower electrode overlapping each other, whose outline includes a curve. Among the plural piezoelectric thin film resonators, the piezoelectric thin film resonators in the opposing electrode regions of the adjacent piezoelectric thin film resonators are shaped to have outlines complementary to each other. With the filter, influences caused by transverse mode undesired wave of the piezoelectric thin film resonators can be suppressed. Therefore, miniaturization can be achieved without sacrificing the mechanical strength of electrodes having hollow structures. | 03-11-2010 |
20100060385 | PIEZOELECTRIC THIN FILM RESONATOR, FILTER, AND COMMUNICATION APPARATUS - A piezoelectric thin film resonator includes a substrate, a lower electrode formed on the substrate, a piezoelectric film formed on the substrate and the lower electrode, and an upper electrode formed on the piezoelectric film and opposing the lower electrode, an upper electrode formed on the piezoelectric film. The upper electrode has a main portion and an extended portion connected to the main portion, the main portion opposing the lower electrode and an opening disposed between the substrate and the lower electrode, the extended portion having a portion which opposes the opening and the substrate. | 03-11-2010 |
20100096358 | LADDER TYPE FILTER - A ladder filter includes a series resonator having a first film laminate in which an upper electrode and a lower electrode face each other across a piezoelectric film, and a first film provided on the first film laminate, and a parallel resonator having a second film laminate having a structure similar to that of the first film laminate, a second film provided on the second film laminate, and another first film identical to the first film. | 04-22-2010 |
20100109800 | DUPLEXER, COMMUNICATION MODULE, AND COMMUNICATION DEVICE - A duplexer of the present invention includes a reception filter ( | 05-06-2010 |
20100110940 | ACOUSTIC WAVE FILTER, DUPLEXER USING THE ACOUSTIC WAVE FILTER, AND COMMUNICATION APPARATUS USING THE DUPLEXER - An acoustic wave filter having excellent steepness is provided without adding any exterior components or any new manufacturing steps. A plurality of filters ( | 05-06-2010 |
20100117762 | RESONATOR, FILTER AND ELECTRONIC DEVICE - A resonator includes a substrate, a lower electrode, a piezoelectric film provided on the lower electrode, and an upper electrode provided on the piezoelectric film. The lower electrode includes a first film provided on the substrate, and a second film that is provided on the first film and has a specific gravity greater than that of the first film. The piezoelectric film is provided on the second film. The upper electrode includes a third film provided on the piezoelectric film, and a fourth film provided on the third film, the third film having a specific gravity greater than that of the fourth film. The third film is thicker than the second film. | 05-13-2010 |
20100134203 | FILTER AND ANTENNA DUPLEXER - There is provided a filter including a first resonator, a second resonator in which an excitation efficiency is reduced more than the first resonator, and an inductor connected in parallel with the second resonator. | 06-03-2010 |
20100141353 | PIEZOELECTRIC THIN FILM RESONATOR, FILTER USING THE RESONATOR, DUPLEXER USING THE FILTER, AND COMMUNICATION EQUIPMENT USING THE FILTER OR THE DUPLEXER - There is provided a piezoelectric thin film resonator that decreases only transverse mode waves selectively while maintaining resonance characteristics due to original thickness longitudinal vibration. The piezoelectric thin film resonator includes: a piezoelectric film ( | 06-10-2010 |
20100148636 | PIEZOELECTRIC THIN FILM RESONANT ELEMENT AND CIRCUIT COMPONENT USING THE SAME - A piezoelectric thin film resonant element includes a resonant portion having a laminate structure made up of a lower electrode, an upper electrode and a piezoelectric film arranged between these two electrodes. The lower electrode has an ellipsoidal plan-view shape and an outer circumference formed with an inclined portion inclined at an angle (about 30° for example) lying within a range of 25° through 55°. The upper electrode has an ellipsoidal plan-view shape. An additional film is provided on the upper electrode at a portion corresponding to the inclined portion of the lower electrode. | 06-17-2010 |
20100148888 | FILTER, DUPLEXER AND COMMUNICATION APPARATUS - The filter includes a series arm piezoelectric thin film resonator placed in the series arm and a parallel arm piezoelectric thin film resonator placed in the parallel arm. Each of the series arm piezoelectric thin film resonator and the parallel arm piezoelectric thin film resonator includes a substrate ( | 06-17-2010 |
20100150075 | FILTER, DEMULTIPLEXER, AND MODULE INCLUDING DEMULTIPLEXER, COMMUNICATION APPARATUS - A demultiplexer has a common terminal, a transmission terminal, and a reception terminal, and furthermore includes a transmission filter connected between the common terminal and the transmission terminal, a reception filter connected between the common terminal and the reception terminal, and a phase shift circuit connected in series to the reception filter connected between the common terminal and the reception terminal. A node on the line from the phase shift circuit to the common terminal or the transmission terminal, and a node on the line from the phase shift circuit to the reception terminal are coupled via a reactance. Accordingly, it is possible to fundamentally reduce or eliminate the situation in which transmission signals from the transmission filter arrive at the reception circuit, and improve isolation. | 06-17-2010 |
20100188166 | FILTER, DUPLEXER AND COMMUNICATION MODULE - According to an aspect of the invention, each of a filter, a duplexer and a communication module includes a plurality of series resonators connected to a signal line in series and a plurality of parallel resonators connected to the signal line in parallel. At least two of the plurality of parallel resonators are connected to the signal line between two of the plurality of series resonators in parallel, inductors are respectively connected to the at least two parallel resonators, and the inductors have different inductances from each other. | 07-29-2010 |
20100237750 | PIEZOELECTRIC THIN FILM RESONATOR, FILTER, COMMUNICATION MODULE AND COMMUNICATION DEVICE - A piezoelectric thin film resonator includes a substrate, a lower electrode provided on the substrate, a piezoelectric film provided on the lower electrode, and an upper electrode provided on the piezoelectric film. At least a portion of the upper electrode and that of the lower electrode oppose each other through the piezoelectric film, and at least a portion of the periphery of the upper electrode is reversely tapered. | 09-23-2010 |