Abstract: A roll cover and a roll in particular for use in a machine line for the production or processing of a fibrous web is provided, wherein the roll cover includes a radial outer functional layer which provides the surface of the roll cover in contact with the web, and wherein the functional layer has structural elements, in particular in the form of grooves and/or bores, wherein the functional layer is constructed of an elastomer material with a Poisson number greater than 0.4, between 0.45 and 0.5.

Abstract: In an embodiment a method for manufacturing a multilayer varistor includes providing a first ceramic powder for producing a first ceramic material and at least one second ceramic powder for producing a second ceramic material, wherein the ceramic powders differ from each other in concentration of monovalent elements X+ by 50 ppm??c(X+)?5000 ppm, wherein X+=(Li+, Na+, K+ or Ag+), and wherein ?c denotes a maximum concentration difference occurring between an active region and a near-surface region of the multilayer varistor, slicking of the ceramic powders and forming of green films, partially printing of a part of the green films with a metal paste to form inner electrodes, stacking printed and unprinted green films, laminating, decarbonizing and sintering the green films and applying outer electrodes.

Abstract: An electrical component comprises a main body and at least one external electrode that is fastened by a connecting material to the main body. The main body and the external electrode have different coefficients of thermal expansion that determine a critical temperature which, when exceeded, results in a connection between the main body and the external electrode experiencing mechanical stresses that lead to damage to the component. The connecting material has a melting point which is lower than a critical temperature.

Abstract: A circuit board having a power supply, an electrical device having a circuit board, and a method for producing a circuit board are disclosed. In an embodiment a circuit board includes a power supply, a carrier substrate and an energy store with a first layer stack having a first electrode layer with a first electrode, a second electrode layer with a second electrode, and an electrolyte layer arranged therebetween, which has an electrolyte, wherein the first electrode, the second electrode and the electrolyte are solid states.

Abstract: In an embodiment a method for manufacturing a multilayer varistor includes providing a first ceramic powder for producing a first ceramic material and at least one second ceramic powder for producing a second ceramic material, wherein the ceramic powders differ from each other in concentration of monovalent elements X+ by 50 ppm??c(X+)?5000 ppm, wherein X+=(Li+, Na+, K+ or Ag+), and wherein ?c denotes a maximum concentration difference occurring between an active region and a near-surface region of the multilayer varistor, slicking of the ceramic powders and forming of green films, partially printing of a part of the green films with a metal paste to form inner electrodes, stacking printed and unprinted green films, laminating, decarbonizing and sintering the green films and applying outer electrodes.

Abstract: An electrical circuit and a method for using the electrical circuit are disclosed. In an embodiment an electrical circuit includes an energy transducer, an energy storage system, a first terminal and a second terminal, wherein the energy transducer is electrically coupled with the first and second terminals, wherein the energy storage system is electrically coupled with the first and second terminals, wherein the energy transducer is configured to charge the energy storage system at discrete time intervals, wherein the energy storage system is configured to provide energy continuously, wherein the energy transducer includes a solar cell, and wherein the energy storage system includes a solid-state storage battery.

Abstract: An LED module is disclosed. In an embodiment an LED module includes a thermally conductive substrate made of a multilayer ceramic, at least one LED on the substrate, passive SMD components arranged on the substrate, a passive component integrated in the substrate and a heat spreader configured to dissipate waste heat in horizontal and vertical directions.

Abstract: An apparatus for producing haptic feedback and an electronic device are disclosed. In an embodiment an apparatus includes a piezoelectric actuator and a mechanical structure, wherein the piezoelectric actuator is configured to modify its extension in a first direction, and wherein the mechanical structure is configured to deform as a result of a change in the extension of the piezoelectric actuator in such a way that an area of the mechanical structure is moved in relation to the piezoelectric actuator in a second direction which is perpendicular to the first direction.

Abstract: A multilayer component is disclosed. In an embodiment, a multilayer component includes a main body with first and second inner electrodes, wherein the first and second electrodes are alternately arranged in an interior of the main body and electrically insulated from one another and an outer contact configured to provide external contact, wherein the outer contact comprises at least two first strip-shaped conductor tracks arranged on a first surface of the main body, wherein each first conductor track is electrically connected to one of the first inner electrodes, wherein the outer contact comprises at least two second strip-shaped conductor tracks arranged on a second surface of the main body, wherein each second conductor track is electrically connected to one of the second inner electrodes, and wherein embossings in adjacent first conductor tracks or second conductor tracks are arranged offset with respect to one another.

Abstract: An electrical component having partial bodies, a base on which the partial bodies are arranged, and at least one connection contact for electrically connecting the partial bodies to a carrier. A method for producing an electrical component having one or more partial bodies is also disclosed.

Abstract: The present invention relates to a component which comprises a main body (9) and at least one external electrode (1) which is fastened by a connecting material (4) to the main body (9), wherein the main body (9) and the external electrode (1) have different coefficients of thermal expansion which determine a critical temperature which when exceeded results in a connection between the main body (9) and the external electrode (1) experiencing mechanical stresses which lead to damage to the component, wherein the connecting material (4) has a melting point which is lower than a critical temperature.

Abstract: An electronic component is disclosed. In an embodiment, an electronic component includes at least one NTC element and at least two electrically conductive contact elements, wherein the NTC element is electrically conductively connected to a respective contact element via a connection material, and wherein a coefficient of thermal expansion of the contact elements is adapted to a coefficient thermal expansion of the NTC element.

Abstract: The present invention relates to a component (1) for generating active haptic feedback, comprising a main body (2) having first and second internal electrodes (3, 4) stacked one above another in a stacking direction (S), wherein a respective piezoelectric layer (9) is arranged between the internal electrodes (3, 4), wherein the component (1) is configured to identify a force exerted on the component (1), wherein the component (1) is configured to generate active haptic feedback if a force exerted on the component (1) is identified, and wherein the haptic feedback is generated by virtue of an electrical voltage being applied between the first and second internal electrodes (3, 4), said electrical voltage resulting in a change in length of the main body (2).

Abstract: The invention relates to a piezoelectric transformer having a piezoelectric element (1) of the length L, wherein an input voltage Uin can be applied on an input side (2) for being transformed into an output voltage Uout on the output side (3) according to a transformation ratio Uout/Uin=Ku. The piezoelectric element (1) comprises multiple plies (4a, 4b, 4c) of inner electrodes, which are arranged in multiple different layers (S1, S2, S3). Each ply (4a, 4b, 4c) of inner electrodes extends along at least one predetermined sub-section of a predetermined length, wherein sub-sections of plies (4a, 4c) of a first group of layers (S1, S3) and sub-sections of plies (4b) of a second group of layers (S2) have different dimensions, so that the piezoelectric transformer satisfies the following condition: Cin?N2Cout, wherein Cin indicates the input capacitance, Cout indicates the output capacitance, and N indicates the transformation ratio of the ideal transformer.

Abstract: An NTC ceramic part, an electronic component for inrush current limiting, and a method for manufacturing an electronic component are disclosed. In an embodiment, an NTC ceramic part for use in an electronic component for inrush current limiting is disclosed, wherein the NTC ceramic part has an electrical resistance in the m? range at a temperature of 25° C. and/or at room temperature.

Abstract: A piezoelectric transformer is disclosed In an embodiment a piezoelectric transformer includes a cylindrical base body with an input region and an output region, wherein a cylinder axis of the base body extends in a longitudinal direction, wherein the input region is configured to convert an AC voltage into a mechanical vibration, wherein the output region is configured to convert a mechanical vibration into an electrical voltage, wherein the output region includes a single piezoelectric layer polarized in the longitudinal direction, wherein, in the input region, a first piezoelectric layer, on which a first internal electrode is arranged, and a second piezoelectric layer, on which a second internal electrode is arranged, are wound onto one another, and wherein the first piezoelectric layer and the second piezoelectric layer are polarized in a radial direction which is perpendicular to the longitudinal direction.

Abstract: In an embodiment a device includes at least one piezoelectric actuator including a plurality of piezoelectric layers and a first reinforcing element and a second reinforcing element, wherein the piezoelectric actuator is arranged between the reinforcing elements, wherein the piezoelectric actuator is configured to alter its expansion in a first direction when an electrical voltage is applied, and wherein the reinforcing elements are configured to deform on account of a change in an expansion of the piezoelectric actuator such that a central region of the respective reinforcing element is moved relative to the piezoelectric actuator in a second direction, the second direction being perpendicular to the first direction.

Abstract: The present invention relates to a carrier (2) with a passive cooling function for a semiconductor component (3), having a main body (6) with a top side (7) and a bottom side (8) and at least one electrical component (13, 13a, 13b) that is embedded in the main body (6), wherein the carrier (2) has a first thermal via (14), which extends from the top side (7) of the main body (6) to the at least one electrical component (13, 13a, 13b), wherein the carrier (2) has a second thermal via (15), which extends from the at least one electrical component (13, 13a, 13b) to the bottom side (8) of the main body (6), and wherein the at least one embedded electrical component (13, 13a, 13b) is electrically contacted by the first and the second thermal via (14, 15).

Abstract: An electrical connection contact (5) for a ceramic component (2) is specified. The connection contact (5) comprises a first material (M1) and a second material (M2) arranged thereon, wherein the first material (M1) has a high electrical conductivity and the second material (M2) has a low coefficient of thermal expansion.

Abstract: A surge protection component with a main body which has at least one inner electrode arranged between two ceramic layers, wherein the at least one inner electrode is set back from at least one lateral face of the main body, wherein a gas-filled cavity is provided between the at least one inner electrode and the at least one lateral face, and wherein an outer electrode is respectively arranged on two mutually opposite lateral faces of the main body. According to a further aspect, the present invention relates to a method for producing a surge protection component.