Abstract: A piezoelectric speaker includes: a peripheral rectangular frame having four sides; a central rectangular frame disposed on the peripheral rectangular frame, wherein the central rectangular frame has four corners and four sides, and the four corners are connected to the four sides of the peripheral rectangular frame; four central triangular cantilevers disposed within the central rectangular frame, wherein each of the central triangular cantilevers has a vibrating end and a fixed end opposite to the vibrating end, and each of the fixed ends of the central triangular cantilevers is connected to the four sides of the central rectangular frame, the four vibrating ends of the four central triangular cantilevers are close to each other, and the four central triangular cantilevers have different dimensions of their respective areas defined within the central rectangular frame; and four peripheral triangular cantilevers disposed between the peripheral rectangular frame and the central rectangular frame.

Abstract: Disclosed are a bonding system and a bonding method. In one embodiment, the bonding system includes a chamber, first and second electrostatic chucks, a visible light sensor module and a nonvisible light module. The chamber is configured to provide a vacuum state. The first electrostatic chuck is configured to hold a first substrate having a first alignment mark in the chamber, wherein the first electrostatic chuck has a first window. The second electrostatic chuck is configured to hold a second substrate having a second alignment mark in the chamber, wherein the second electrostatic chuck has a second window. The visible light sensor module is configured to capture images of the first and the second alignment marks. The nonvisible light module is configured to capture a combined image of the first and second alignment marks via the first and second windows overlapping each other in the vacuum state.

Abstract: A method and a system for predicting etching recipe are provided, wherein the method includes steps as follows: Firstly, a plurality of etching recipes of existing etched products and a plurality sets of position-optical measurement values corresponding to the plurality of etching recipes are collected. Then, a supervised learning training is performed according to a plurality of optical measurement values in each set of the position-optical measurement values to build a predicting model. A specification data of a product to be etched including a position-optical parameter is input into this predicting model to obtain a prediction result. Subsequently, according to the prediction result, one of the plurality of etching recipes of the existing etched products is selected as a suggested etching recipe for the product to be etched.

Abstract: The present invention provides a voltage control method for controlling a power supply. The voltage control method comprises the following steps: obtaining a present output voltage value associated with a present gain value; obtaining a predetermined output voltage value associated with a predetermined duty ratio; calculating a target gain value, corresponding to the predetermined duty ratio, according to a gain value formula; performing a weight calculation on the present gain value and the target gain value for generating a buffer gain value; and setting an output voltage command according to the buffer gain value. Wherein the buffer gain value is between the present gain value and the target gain value.

Abstract: The present invention provides a voltage control method for controlling a power supply. The voltage control method comprises the following steps: obtaining a present output voltage value associated with a present gain value; obtaining a predetermined output voltage value associated with a predetermined duty ratio; calculating a target gain value, corresponding to the predetermined duty ratio, according to a gain value formula; performing a weight calculation on the present gain value and the target gain value for generating a buffer gain value; and setting an output voltage command according to the buffer gain value. Wherein the buffer gain value is between the present gain value and the target gain value.

Abstract: The present invention provides a circuitry within a router or a switch, wherein the circuitry comprises a priority decision circuitry and a per-stream filtering and policing circuitry. The priority decision circuitry is configured to determine a priority of a frame received from a port of the router or the switch. The per-stream filtering and policing circuitry is configured to classify the frame into a first-type frame, a second-type frame or a third-type frame, wherein if the frame is determined as the first-type frame, the per-stream filtering and policing circuitry forwards the frame; if the frame is determined as the third-type frame, the per-stream filtering and policing circuitry discards the frame; and if the frame is determined as the second-type frame, the per-stream filtering and policing circuitry changes the priority of the frame, and the per-stream filtering and policing circuitry forwards the frame with the changed priority.

Abstract: An electronic system includes an echo canceller, a calculation unit, and a control circuit. The echo canceller includes a plurality of operational segments and is configured to perform echo cancellation in a data mode or a power-saving mode. Based on the power of each operational segment provided by the calculation unit, the control circuit is configured to deactivate each stage whose power is lower than a threshold value when the echo canceller is performing echo cancellation in the power-saving mode.

Abstract: A detector circuit incudes a calculator circuit and a comparator circuit. The calculator circuit is configured to generate a plurality of first calculation values according to a plurality of first calculation symbols of a Pseudo-Noise Sequence and a plurality of second calculation symbols of a received signal, and generate a second calculation value according to the first calculation values. If a sign of a symbol of the Pseudo-Noise Sequence is the same to a sign of an adjacent symbol, the symbol is one of the first calculation symbols, and the second calculation symbols are corresponding to the first calculation symbols respectively. The comparator circuit is configured to generate a comparison result according to the second calculation value and a threshold value. The comparison result is configured for determining whether the detector circuit correctly receives the Pseudo-Noise Sequence.

Abstract: A detector circuit includes a calculator circuit and a comparator circuit. The calculator circuit is configured to generate a plurality of first calculation values according to a plurality of first calculation symbols of a Pseudo-Noise Sequence and a plurality of second calculation symbols of a received signal, and generate a second calculation value according to the first calculation values. If a sign of a symbol of the Pseudo-Noise Sequence is the same to a sign of an adjacent symbol, the symbol is one of the first calculation symbols, and the second calculation symbols are corresponding to the first calculation symbols respectively. The comparator circuit is configured to generate a comparison result according to the second calculation value and a threshold value. The comparison result is configured for determining whether the detector circuit correctly receives the Pseudo-Noise Sequence.

Abstract: A system, a control method and an apparatus for chemical mechanical polishing (CMP) are introduced in the present application. The CMP apparatus may include a polishing pad, a first sensor, a polishing head and a condition. The polishing pad has a plurality of groves arranged randomly or in a specific pattern. The first sensor is configured to measure the pad profile of the polishing pad, where the pad profile includes the depth of each of the grooves on the polishing pad. The polishing head and the conditioner are operated according to at least one polishing condition, and the at least one polishing condition is tuned according to the pad profile.

Abstract: The invention relates to an intelligent POS machine. The intelligent POS machine comprises a housing, a card reading module, a turning plate, and a rear work module; the housing is internally provided with an embedding groove; the card reading module is located in the embedding groove; the rear work module is installed on the turning plate; the turning plate is hinged on an inside wall of the embedding groove and located above the card reading module; the housing is internally provided with a control board; the card reading module is connected with the control board, and the rear work module is connected with the control board through an FPC board. In this way, the whole exterior of the POS machine is more integrated and more elegant.

Abstract: An unmanned aerial vehicle (UAV) including a vehicle body and an airflow thruster is provided. The vehicle body has a center hub, an airflow guiding structure and an outer circumferential portion. An interior of the airflow guiding structure is interconnected between the center hub and the outer circumferential portion. The center hub has an airflow inlet. The outer circumferential portion has a plurality of lateral guiding outlets facing downward and corresponding to a gravity direction of the gravity direction of the unmanned aerial vehicle. The airflow thruster is disposed inside the center hub for generating a plurality of jet streams, such that the jet streams flow to the lateral guiding outlets through the airflow guiding structure to generate a propulsion.

Abstract: A communication device includes a circuit board having an upper surface and a lower surface, an upper housing disposed on the upper surface, and a lower housing disposed on the lower surface. The circuit board includes a top metal frame disposed on the upper surface, wherein the top metal frame defines a top cavity; a bottom metal frame disposed on the bottom surface, wherein the bottom metal frame defines a bottom cavity corresponding to the top cavity; a microstrip line disposed on the upper surface and extending into the top cavity; and a side coupler disposed on the lower surface and extending into the bottom cavity. The upper housing includes a depression corresponding to the top cavity, and the lower housing includes an aperture corresponding to the bottom cavity.

Abstract: A system, a control method and an apparatus for chemical mechanical polishing (CMP) are introduced in the present application. The CMP apparatus may include a polishing pad, a first sensor, a polishing head and a condition. The polishing pad has a plurality of groves arranged randomly or in a specific pattern. The first sensor is configured to measure the pad profile of the polishing pad, where the pad profile includes the depth of each of the grooves on the polishing pad. The polishing head and the conditioner are operated according to at least one polishing condition, and the at least one polishing condition is tuned according to the pad profile.

Abstract: A communication device includes a circuit board having an upper surface and a lower surface, an upper housing disposed on the upper surface, and a lower housing disposed on the lower surface. The circuit board includes a top metal frame disposed on the upper surface, wherein the top metal frame defines a top cavity; a bottom metal frame disposed on the bottom surface, wherein the bottom metal frame defines a bottom cavity corresponding to the top cavity; a microstrip line disposed on the upper surface and extending into the top cavity; and a side coupler disposed on the lower surface and extending into the bottom cavity. The upper housing includes a depression corresponding to the top cavity, and the lower housing includes an aperture corresponding to the bottom cavity.

Abstract: A wearable electronic device includes a host, a wearing member, and a backup power module. The host includes a functional module, a main power module, and an electrical connection port. The main power module is configured to supply power to the functional module. The electrical connection port is electrically connected to the main power module. The wearing member is connected to the host. The backup power module is detachably disposed at an upper region or a surrounding region of the host to electrically couple the electrical connection port, or is detachably disposed on the wearing member and configured to electrically couple the electrical connection port to supply power to the main power module.

Abstract: A transmission device having a data storage function and capable of being in a folded state by a magnetic force includes a first transmission port (e.g., a Lightning plug) at one end, a second transmission port (e.g., a USB plug) at the other end, a flexible bending portion in the middle section, two magnetically attractive portions respectively adjacent to two opposite ends of the bending portion, and a card reader or data storage unit. Once the first transmission port is connected to a portable device (e.g., a smartphone) to allow the portable device to read data from the transmission device, the bending portion can be bent so that, by the magnetic force of the magnetically attractive portions, the transmission device is rendered into a folded state and is partially hidden behind the portable device to facilitate holding and avoid getting loose and falling off.

Abstract: An unmanned aerial vehicle (UAV) including a vehicle body and an airflow thruster is provided. The vehicle body has a center hub, an airflow guiding structure and an outer circumferential portion. An interior of the airflow guiding structure is interconnected between the center hub and the outer circumferential portion. The center hub has an airflow inlet. The outer circumferential portion has a plurality of lateral guiding outlets facing downward and corresponding to a gravity direction of the gravity direction of the unmanned aerial vehicle. The airflow thruster is disposed inside the center hub for generating a plurality of jet streams, such that the jet streams flow to the lateral guiding outlets through the airflow guiding structure to generate a propulsion.

Abstract: A three-way handshaking method includes: controlling a first port in a first specific mode to send a first specific signal to a second port, and controlling the first port to enter a second specific mode; when the first port receives a second specific signal, determining the second port is in the second specific mode and controlling the first port to send a third specific signal to the second port; and when it is determined that the second port is in a third specific mode, controlling the first port to enter the third specific mode.