Pi Ceramic Gmbh

Pi Ceramic Gmbh Keramische Technologien Und Bauelemente

Peter Ditas

Eberhard Hennig

Daniel Kopsch

Frank Grünwald

Benjamin Sennfelder

An ultrasonic transducer and a method for producing an ultrasonic transducer are disclosed wherein the ultrasonic transducer has outstanding media resistance and a simpler construction by reducing the number of individual parts, so that the ultrasonic transducer can be produced in a fully-automated production process. The ultrasonic transducer, particularly for measurement of fluid volumes, can include a housing in which a contact element and a piezoceramic are arranged, wherein the piezoceramic includes two electrodes of differing polarity which are attached to different sides of the piezoceramic, wherein contact areas of the two electrodes for making electrical contact are disposed on a same side of the piezoceramic and the contact element includes at least two contact sections of differing polarity which are in electrically conducting contact with the contact areas of the two electrodes of corresponding polarity.

Ultrasonic transducer with a piezoceramic and method for producing an ultrasonic transducer of this kind

An actuator device (AV) including a main body () with a base body () and a buildup body () a plurality of actuators which are formed of actuator bodies comprising a piezoelectric or electrostrictive material and actuation electrodes and a printed circuit board () which extends in the longitudinal direction (X) of the actuator device (AV) over at least sections of actuator connection coatings, wherein conductive paths thereof are in electrical contact with the actuator connection coatings and wherein in the connection area segment (S, S, S, S) of the respective recess (S, S, S, S) at least in sections a connection layer (V) made of a resin reinforcement material with bismaleimide is disposed such that the connection layer (V) at least in sections contacts side surfaces (AS, AS) which respectively delimit a connection area segment (S, S, S, S) and which are opposed to each other.

Actuator device

An actuator body, including a plurality of piezoceramic layers, separated from each other by a positive or negative internal electrode in alternation, positive and negative collecting electrodes, which are arranged on two outer faces of the actuator body and are conductively connected to the associated positive or negative internal electrodes, wherein the actuator body of the multilayer actuator has at least one positive and one negative contacting electrode, by which the multilayer actuator is electrically contacted and is conductively connected to the associated positive or negative collecting electrode, and the contacting electrodes are arranged in areas of the actuator body that are provided with a base metallization. The areas of the actuator body with a base metallization are spaced apart from each other and distances from the internal electrodes, wherein the distances are not less than the thickness of the piezoceramic layers in the active area of the multilayer actuator.

Multilayer piezoelectric actuator

The invention relates to a device for the production of a haptic feedback from keyless input units such as touchscreens or keypads in mobile IT devices such as mobile telephones, PDAs, music or multimedia players, cameras, navigation devices, etc. The market demands a device which can produce a haptic signal for a touchscreen such that the display is movable as a whole essentially perpendicular to the housing surface at least in one direction. In order to resolve this object the invention provides for a device for the production of a haptic feedback from a keyless input unit, whereby the device has an elastic, essentially plate-shaped substrate, which at least comprises a first support location for fixing the substrate on a structure of the input device and at least a second support location for fixing the substrate on the input unit, and is formed to support the input unit movably with respect to the structure of the input device, whereby a piezoelectric element between the first and second support locations of the substrate is arranged in such a manner that with an electrical drive to the piezoelectric element one of the support locations is moved transverse to the plane of the plate-shaped substrate.

Growing community of inventors

Münchenbernsdorf, Germany

Peter Ditas