Patent application number | Description | Published |
20110095844 | ELASTIC WAVE DEVICE AND LADDER FILTER DEVICE - An elastic wave device includes a first elastic wave resonator and a second elastic wave resonator that are connected in series to each other, and a resistor is connected in parallel with the first elastic wave resonator while no resistors are connected in parallel with the second elastic wave resonator. | 04-28-2011 |
20110120679 | PIEZOELECTRIC FAN AND COOLING DEVICE - A piezoelectric element is attached to a vibrating plate. By expanding and contracting the piezoelectric element, the vibrating plate is bent. The vibrating plate includes removed regions on both sides of a portion to which the piezoelectric element is attached. The vibrating plate includes a plurality of the blades provided at one end thereof. By bending the vibrating plate, the blades swing. The blades are bent toward grooves between heat dissipating fins of a heat sink. The other end of the vibrating plate is fixed with screws to an upper portion of the heat sink with a supporting plate disposed therebetween such that the each of the blades are located in a groove between the heat dissipating fins of the heat sink and the removed regions are located over the grooves between the heat dissipating fins. | 05-26-2011 |
20110223043 | PIEZOELECTRIC FAN AND COOLING DEVICE - A piezoelectric fan includes reinforcing plates that increase the rigidity of a portion of the vibrating plate corresponding to a gap between a piezoelectric element and a fixing plate. First ends of the reinforcing plates are attached to portions of the vibrating plate on both sides of piezoelectric elements in the width direction, and second ends of the reinforcing plates are attached to a fixed end of the vibrating plate such that the second ends and the fixing plate sandwich the fixed end of the vibrating plate therebetween and such that the reinforcing plates extend over the gap. The reinforcing plates prevent vibration of the portion of the vibrating plate corresponding to the gap, prevent a portion of vibration energy generated by expansion and contraction of the piezoelectric elements from being consumed in the portion corresponding to the gap, and increase the amplitude of the vibration of blade ends. | 09-15-2011 |
20120025931 | BOUNDARY ACOUSTIC WAVE RESONATOR AND LADDER FILTER - In a boundary acoustic wave resonator, apodization weighting is performed on an IDT electrode so that an intersecting width decreases as a location moves outward in a boundary acoustic wave propagation direction. An inner side of a first busbar includes inclined portions that are disposed a predetermined distance from an envelope portion B | 02-02-2012 |
20140169996 | PIEZOELECTRIC ACTUATOR - A piezoelectric fan includes a vibration sheet, piezoelectric elements, a reinforcing sheet having one principal surface bonded to the vibration sheet and the other principal surface bonded to the piezoelectric element, and a fixing sheet. The vibration sheet is fixed to the inside of an electronic device by the fixing sheet which is disposed at one end of the vibration sheet. The total thickness of the reinforcing sheet and a region of the vibration sheet in which the piezoelectric elements are disposed is greater than the average thickness of a region of the vibration sheet in which the piezoelectric elements are not disposed. The coefficient of linear expansion of the vibration sheet is higher than that of the first and second piezoelectric elements. The reinforcing sheet is formed of a material having a coefficient of linear expansion and a modulus of elasticity identical to the vibration sheet. | 06-19-2014 |
20140175948 | PIEZOELECTRIC ACTUATOR - A piezoelectric fan includes a vibration sheet, piezoelectric elements, a reinforcing sheet bonded to at least one of principal surfaces of the piezoelectric element, a reinforcing sheet bonded to at least one of principal surfaces of the piezoelectric element, and a fixing sheet. The vibration sheet is fixed to the inside of an electronic device by the fixing sheet disposed at one end of the vibration sheet. The total thickness of the reinforcing sheets and a region of the vibration sheet adjacent to the piezoelectric elements is greater than the average thickness of a region of the vibration sheet in which the piezoelectric elements are not disposed. The piezoelectric elements are disposed symmetrically to the center plane of the thickness direction of the vibration sheet. The reinforcing sheets are disposed symmetrically to the center plane of the thickness direction of the vibration sheet. | 06-26-2014 |
20140341762 | PIEZOELECTRIC FAN - A piezoelectric fan includes a vibrating plate including blades and a base that are integral. Piezoelectric elements are mounted on the blade on the side of the base. Piezoelectric elements are mounted on the blade on the side of the base. Piezoelectric elements are mounted on the blade on the side of the base. Support bodies are disposed such that the base of the vibrating plate is sandwiched therebetween. A portion of each of the piezoelectric elements is sandwiched between the vibrating plate and the support plate, and a portion of each of the piezoelectric elements is sandwiched between the vibrating plate and the support plate. | 11-20-2014 |
20150023819 | PIEZOELECTRIC FAN - A piezoelectric fan in which vibration of blades is unaffected by external noise includes a vibrating plate including blades and a base. First piezoelectric elements are attached to a side of a first blade adjacent to the base. Second piezoelectric elements are attached to a side of a second blade adjacent to the base. Third piezoelectric elements are attached to a side of a third blade adjacent to the base. A holder includes a supporting body and a holding member that sandwich the base therebetween. The holding member has a supporting portion and main-body fixing portions including respective main-body fixing holes. The main-body fixing portions extend from the supporting portion. | 01-22-2015 |
Patent application number | Description | Published |
20080266023 | SURFACE ACOUSTIC WAVE DEVICE AND BOUNDARY ACOUSTIC WAVE DEVICE - A piezoelectric substrate is joined to a cover with a support layer disposed therebetween and with a space maintained therebetween. A transmission surface acoustic wave filter and a reception surface acoustic wave filter are disposed on a major surface of the piezoelectric substrate adjacent to the cover and inside the support layer. External electrodes are provided on the side of the cover opposite to the side facing the piezoelectric substrate. The external electrodes include an antenna terminal electrically connected to the transmission surface acoustic wave filter and the reception surface acoustic wave filter, a transmission input terminal electrically connected to the transmission surface acoustic wave filter, and a reception output terminal electrically connected to the reception surface acoustic wave filter. A portion of an interconnection line that electrically connects the reception surface acoustic wave filter to the antenna terminal is disposed on the cover. | 10-30-2008 |
20090322444 | RESONATOR DEVICE, FILTER INCLUDING THE SAME, AND DUPLEXER - A resonator device includes a plurality of resonators which are connected in series. An inductor and a capacitor are connected in parallel with at least one of the plurality of resonators. At least another one of the plurality of resonators has no inductor or capacitor connected in parallel therewith. Therefore, a sufficiently large attenuation outside the passband can be attained when the resonator device is used in a filter. Furthermore, the resonator device can be reduced in size. | 12-31-2009 |
20100109802 | BRANCHING FILTER - A branching filter includes an antenna terminal, a transmission signal terminal, a reception signal terminal, a transmission filter element, and a reception filter element. At least one of the transmission filter element and the reception filter element includes a longitudinally coupled resonator filter element having first and second IDT electrodes arranged along a direction of propagation of an elastic wave. The first IDT electrode includes a first end connected to the antenna terminal. The second IDT electrode includes a first end connected to one of the transmission signal terminal and the reception signal terminal. The longitudinally coupled resonator filter element further includes an inductor connected in series between a second end of the first IDT electrode and a ground potential. | 05-06-2010 |
20100117483 | ELASTIC WAVE DEVICE AND METHOD OF PRODUCING THE SAME - An elastic wave device has a structure that prevents cracks from being formed in a piezoelectric substrate in flip-chip bonding using a bump, that minimizes the contact resistance in a contact portion where wiring patterns are electrically connected to each other, and that improves the insertion loss. In the elastic wave device, first and second multilayer electrically conductive films are provided on a piezoelectric substrate, the first multilayer electrically conductive film defines an IDT electrode and a first wiring pattern, the second multilayer electrically conductive film defines an electrode pad to which a bump is connected and a second wiring pattern, at least one contact portion where the second wiring pattern is overlapped on the first wiring pattern so as to be electrically connected to each other is provided, a top electrically conductive film of the first multilayer electrically conductive film is a Ti film, and a bottom electrically conductive film of the second multilayer electrically conductive film is an Al-based electrically conductive film including Al or an alloy mainly containing an Al. | 05-13-2010 |
20100176900 | SURFACE ACOUSTIC WAVE RESONATOR AND LADDER-TYPE FILTER - A surface acoustic wave resonator is constructed such that cross widths of an IDT electrode are weighted so that the cross widths are reduced as they move outward in the surface acoustic wave propagation direction, an inner edge of a first bus bar includes inclined portions that are inclined so that the inner edge is spaced a predetermined distance away from an envelope portion adjacent to the first bus bar, an inner edge of a second bus bar includes inclined portions that are inclined so that the inner edge is spaced a predetermined distance away from an envelope portion adjacent to the second bus bar, and the sum N of the numbers of electrode fingers and dummy electrodes that are crossed by a straight line extending from the tip of at least one of the electrode fingers in the surface acoustic wave propagation direction is at least N. | 07-15-2010 |