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 transducer includes a flexible layer, a first conductive layer on the flexible layer, a support frame on the first conductive layer, the support frame including a flexible material, a membrane over the support frame being spaced apart from the first conductive layer by the support frame, the membrane including the flexible material, a cavity defined by the first conductive layer, the support frame and the membrane, and a second conductive layer on the membrane.

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 includes a flexible layer, a first conductive layer on the flexible layer, a support frame on the first conductive layer, the support frame including a flexible material, a membrane over the support frame being spaced apart from the first conductive layer by the support frame, the membrane including the flexible material, a cavity defined by the first conductive layer, the support frame and the membrane, and a second conductive layer on the membrane.

Abstract: An ultrasonic wave device has a first flexible layer, a second flexible layer, a flexible circuit between the first flexible layer and the second flexible layer, and one or more arrays of capacitive ultrasonic transducer between the first flexible layer and the second flexible layer electrically coupled to the flexible circuit. The array of capacitive ultrasonic transducer is configured to transmit ultrasonic energy through the second flexible layer in response to electrical energy applied via the flexible circuit.

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: A flexible ultrasonic transducer, comprising a plurality of ultrasonic transducer elements. Each of the ultrasonic transducer elements in turn comprises a base, a membrane and a first and a second electrode. The base is made of soft material, having an upper side and a lower side, with a support set on the upper side. The membrane is able to perform vibrations, having an outer side and an inner side, which is laid on the support. The first electrode is placed on the base and the second electrode placed in the membrane, the first and second electrodes being connected with a voltage source. Manufacturing the flexible ultrasonic transducer requires less steps without increasing cost. By having a flexible shape, emission and reception of ultrasonic waves as well as an effective area are enhanced, with less attenuation of ultrasonic waves, resulting in more effective sensing.