Abstract: A bulk acoustic wave (BAW) device is provided comprising a first electrode, a second electrode, a piezoelectric layer positioned between the first electrode and the second electrode, and a raised frame structure outside of a middle area of an active domain of the BAW device, the raised frame structure comprising one or more raised frame layer(s). At least one of the raised frame layer(s) comprises a tapered portion tapering in a direction towards the middle area of the active domain. A packaged module comprising such a BAW device is also provided. A wireless mobile device comprising such a packaged module is also provided.

Abstract: A bulk acoustic wave resonator having a central region, an outer region, and a raised frame region between the central region and the outer region is disclosed. The bulk acoustic wave resonator can include a piezoelectric layer and a top electrode over the piezoelectric layer. The top electrode is disposed at least in the central region, the outer region, and the raised frame region, the top electrode including a first layer and a second layer. A material of the first layer is different from the material of the second layer.

Abstract: Aspects of this disclosure relate to bulk acoustic wave devices that have a piezoelectric layer between a first electrode and a second electrode and a suspended frame structure that is suspended over a gap. The gap can be between the first electrode and the piezoelectric layer or between the second electrode and the piezoelectric layer. The bulk acoustic wave devices can have an inner raised frame portion inside of the suspended frame. The gap can be disposed between portions of the first and second electrodes that extend past an end of the piezoelectric layer. A conductive material can extend through an opening in a passivation layer at a location directly above the gap.

Abstract: Aspects of this disclosure relate to method of manufacturing a bulk acoustic wave device. The method can include providing a bulk acoustic wave device structure including a first piezoelectric layer and forming a second piezoelectric layer over the first piezoelectric layer by atomic layer deposition. The second piezoelectric layer can have an opposite polarization relative to the first piezoelectric layer.

Abstract: A bulk acoustic wave resonator having a central region, an outer region, and a raised frame region between the central region and the outer region is disclosed. The bulk acoustic wave resonator can include a piezoelectric layer and a top electrode over the piezoelectric layer. The top electrode is disposed at least in the central region, the outer region, and the raised frame region. The top electrode is configured such that a resonant frequency in the outer region is higher than a resonant frequency in the central region.

Abstract: The present disclosure provides a bulk acoustic wave resonator comprising a piezoelectric layer and a top electrode disposed on a first surface of the piezoelectric layer. The bulk acoustic wave resonator has a central region, a first outer region, and a first raised frame region between the central region and the first outer region. The top electrode has a first thickness within the central region, a second thickness within the first raised frame region, and a third thickness within the first outer region, the second thickness being greater than both the first thickness and the third thickness. A die, filter, radio-frequency module and wireless mobile device are also provided.

Abstract: Aspects of this disclosure relate to bulk acoustic wave devices that have a piezoelectric layer between a first electrode and a second electrode and a suspended frame structure that is suspended over a gap. The gap can be between the first electrode and the piezoelectric layer or between the second electrode and the piezoelectric layer. The bulk acoustic wave devices can have an inner raised frame portion inside of the suspended frame. The gap can be disposed between portions of the first and second electrodes that extend past an end of the piezoelectric layer. A conductive material can extend through an opening in a passivation layer at a location directly above the gap.

Abstract: Aspects of this disclosure relate to a bulk acoustic wave device with a plurality of piezoelectric layers having at least one polarization inversion. The bulk acoustic wave device can include a first piezoelectric layer and a second piezoelectric layer over the first piezoelectric layer. The second piezoelectric layer can be formed by atomic layer deposition. The second piezoelectric layer can have an opposite polarization relative to the first piezoelectric layer. Related filters, multiplexers, packaged radio frequency modules, radio frequency front ends, wireless communication devices, and methods are disclosed.

Abstract: The present invention relates to a suspended nanowire structure. The present invention, more particularly, relates to a suspended nanowire structure capable of high-speed operation by improving the reaction rate by making the temperature distribution of the nanowire uniform. A suspended nanowire structure in accordance with an embodiment of the present invention comprises: a substrate; a plurality of nanowires float on the substrate and extending along a first direction; electrodes respectively connected to both ends of the plurality of nanowires; and a heating electrode which is disposed on both ends of the plurality of nanowires, extends in a second direction perpendicular to the first direction, and provides heat to both ends of the plurality of nanowires during driving.

Abstract: Aspects of this disclosure relate to a bulk acoustic wave device with a plurality of piezoelectric layers having at least one polarization inversion. The bulk acoustic wave device can include a plurality of stacked piezoelectric layers. The plurality of stacked piezoelectric layers can include a piezoelectric layer formed by atomic layer deposition. The bulk acoustic wave device can excite an overtone mode as a main mode. Related filters, multiplexers, packaged radio frequency modules, radio frequency front ends, wireless communication devices, and methods are disclosed.

Abstract: According to the present disclosure, a passband filter is provided. The passband filter comprises a first connection, a second connection, and a third connection. One or more resonators of a first type are provided connected in series between the first connection and the second connection; and one or more resonators of a second type are provided connected from between the first connection and the second connection to the third connection. A radio-frequency front end module and wireless mobile device are also provided.

Abstract: A radio-frequency front end module comprises a first substrate, a second substrate arranged opposing the first substrate, one or more resonators disposed on a surface of the first substrate, the first surface of the first substrate facing the second substrate, and one or more antennas that are each supported by the first substrate and the second substrate. A beamforming antenna is also provided, as is a wireless mobile device.

Abstract: A piezoelectric microelectromechanical systems diaphragm microphone can be mounted on a printed circuit board. The microphone can include a substrate with an opening between a bottom end of the substrate and a top end of the substrate. The microphone can have two or more piezoelectric film layers disposed over the top end of the substrate and defining a diaphragm structure. Each of the two or more piezoelectric film layers can have a predefined residual stress that substantially cancel each other out so that the diaphragm structure is substantially flat with substantially zero residual stress. The microphone can include one or more electrodes disposed over the diaphragm structure. The diaphragm structure is configured to deflect when the diaphragm is subjected to sound pressure via the opening in the substrate.

Abstract: An embodiment driving distribution apparatus of a drone unit includes a first drone unit located on a first end of a vehicle and a second drone unit located on a second end of the vehicle, wherein each of the first and second drone units includes a sensor unit configured to measure a gradient traveling environment of the vehicle, a driving unit configured to apply a driving force of the vehicle, and a control unit configured to control driving amounts of the first drone unit and the second drone unit based on the gradient traveling environment of the vehicle.

Abstract: Embodiments of this disclosure relate to bulk acoustic wave resonators on a substrate. The bulk acoustic wave resonators include a first bulk acoustic wave resonator, a second bulk acoustic wave resonator, a conductor electrically connecting the first bulk acoustic wave resonator to the second bulk acoustic wave resonator, and an air gap positioned between the conductor and a surface of the substrate.

Abstract: The present disclosure relates to a composition for ameliorating immune disorders and preventing or treating respiratory inflammatory diseases, the composition including, as an active ingredient, new lactic acid bacteria from Lactobacillus plantarum KC3 (also referred to as “CKDB-KC3”).

Abstract: Provided is a system for providing an insurance service based on artificial intelligence (AI), the system including a first terminal configured to provide an insurance consulting service and to filter potential customer information; a server configured to interact with the first terminal, to deliver the filtered potential customer information to the first terminal, and to deliver feedback on a quality of consultation for the insurance consulting service to the first terminal; and a plurality of second terminals configured to interact with the first terminal and the server, to deliver a request for the insurance consulting service to the server, and to receive customized insurance information about each of users from the server.

Abstract: An embodiment apparatus includes a loading part of a vehicle, a drone unit connected with the loading part and configured to apply a driving force of the vehicle, a connecting unit positioned on a lower side of the loading part and connected with a part of an upper side of the drone unit, and a receiving unit positioned on the upper side of the drone unit and corresponding to the connecting unit.

Abstract: An apparatus for locking chassis frames includes a locking assembly configured to be positioned at one end of a first chassis frame; and a receiving unit configured to be positioned in a second chassis frame corresponding to the first chassis frame in a longitudinal direction, and configured such that at least a part of the locking assembly is configured to be inserted into the receiving unit. The locking assembly includes a cylinder housing configured to be positioned in the first chassis frame, a locking unit moved in the cylinder housing, and a first switch part positioned at one end of the cylinder housing, and configured to drive a fluid pressure unit when the second chassis frame comes into contact with the first chassis frame.

Abstract: A ladder filter comprises a plurality of series arm bulk acoustic wave resonators electrically connected in series between an input port and an output port of the ladder filter and a plurality of shunt bulk acoustic wave resonators electrically connected in parallel between adjacent ones of the plurality of series arm bulk acoustic wave resonators and ground, at least one of the plurality of shunt bulk acoustic wave resonators including raised frame regions having a first width, at least one of the plurality of series arm bulk acoustic wave resonators having one of raised frame regions having a second width less than the first width or lacking raised frame regions.