Abstract: A capacitive ultrasonic transducer includes a first electrode, an insulating layer formed on the first electrode, at least one support frame formed on the insulating layer, and a second electrode formed space apart from the first electrode, wherein the first electrode and the second electrode define an effective area of oscillation of the capacitive ultrasonic transducer, and the respective length of the first electrode and the second electrode defining the effective area of oscillation is substantially the same.

Abstract: A capacitive ultrasonic device is capable of detecting an object and providing information regarding an orientation of the object. The capacitive ultrasonic device includes a power source configured to generate a voltage signal, an array of sensor elements, each of the sensor elements being configured to generate an ultrasonic wave during a first period of the voltage signal and detect whether a wave is reflected from the object during a second period of the voltage signal when the voltage signal is applied thereto, and a control unit configured to activate a first portion of the array of sensor elements through the power source, and activate a second portion of the array of sensor elements when at least one of the first portion of the sensor elements detects a wave reflected from the object.

Abstract: A capacitive ultrasonic transducer includes a first electrode, an insulating layer formed on the first electrode, at least one support frame formed on the insulating layer, and a second electrode formed spaced apart from the first electrode, wherein the first electrode and the second electrode define an effective area of oscillation of the capacitive ultrasonic transducer, and the respective length of the first electrode and the second electrode defining the effective area of oscillation is substantially the same.

Abstract: A capacitive ultrasonic device is capable of detecting an object and providing information regarding an orientation of the object. The capacitive ultrasonic device includes a power source configured to generate a voltage signal, an array of sensor elements, each of the sensor elements being configured to generate an ultrasonic wave during a first period of the voltage signal and detect whether a wave is reflected from the object during a second period of the voltage signal when the voltage signal is applied thereto, and a control unit configured to activate a first portion of the array of sensor elements through the power source, and activate a second portion of the array of sensor elements when at least one of the first portion of the sensor elements detects a wave reflected from the object.

Abstract: A capacitive ultrasonic transducer includes a first electrode, an insulating layer formed on the first electrode, at least one support frame formed on the insulating layer, and a second electrode formed spaced apart from the first electrode, wherein the first electrode and the second electrode define an effective area of oscillation of the capacitive ultrasonic transducer, and the respective length of the first electrode and the second electrode defining the effective area of oscillation is substantially the same.

Abstract: A capacitive ultrasonic transducer includes a first electrode, an insulating layer formed on the first electrode, at least one support frame formed on the insulating layer, and a second electrode formed spaced apart from the first electrode, wherein the first electrode and the second electrode define an effective area of oscillation of the capacitive ultrasonic transducer, and the respective length of the first electrode and the second electrode defining the effective area of oscillation is substantially the same.

Abstract: A capacitive ultrasonic transducer and method of fabricating the same are disclosed, whereas the capacitive ultrasonic transducer is a stacking of multiple metal layers. The fabrication method of the invention is characterized in that: the structure and cavity of excitation are formed by lithographing and etching the sacrificial layer and other stacking layers, whereas the sacrificial layer and the other stacking layer are made of metal, and moreover, a protective bulk is formed on the capacitive ultrasonic transducer by a means of metal depositing. It is noted that not only the structure of capacitive ultrasonic transducer of the invention has a bulk for protection, which is different to that of a conventional capacitive ultrasonic transducer, but also the method of fabricating the same can do without the steps of electrode formation, high-temperature processing and annealing, which enable the method to have simplified process and thus cost less than that of conventional methods.

Abstract: An apparatus for endpoint detection during polish, being used to monitor the surface polishing status of a polishing surface of a workpiece, is disclosed, which comprises: a probe, being positioned above the workpiece by a height; and at least a sensing element, being disposed on the probe at a position corresponding to the polishing surface, capable of sensing the thickness variation of the workpiece during a polishing process as it is performing a surface dynamic scan upon the workpiece in rotating while it is being driven to proceed a linear motion of displacement. Preferably, the sensing element can be a device selected from the group consisting of an optical sensor, an eddy current sensor and the combination of the two for carrying out optical detection and magnetic flux detection.

Abstract: A sealing cap with an anti-counterfeit and identification capability comprises a cap body, an identification chip with a signal emitting device generating an identification signal, and a destructive device, characterized in that the cap body is electrically connected with the signal generating device and serves as an antenna of a relatively large area and in that the destructive device after dismounting of the cap destroys the capability to emit radiation and thus prevents said identifying chip from being dismounted and reused.

Abstract: A sealing cap with an anti-counterfeit and identification capability comprises a cap body, an identification chip with a signal emitting device generating an identification signal, and a destructive device, characterized in that the cap body is electrically connected with the signal generating device and serves as an antenna of a relatively large area and in that the destructive device after dismounting of the cap destroys the capability to emit radiation and thus prevents said identifying chip from being dismounted and reused.