Abstract: A device for particle sensing is disclosed. The device includes a sensor including a bulk acoustic wave resonator having a resonant frequency, an acoustic mirror arranged to support the resonator, and a heater in thermal communication with the resonator such that a resonator temperature is based on a heater temperature. The device also includes circuitry connected to the sensor. The circuitry comprises a driver configured to drive the heater with a driver signal having a constant periodic cycle, and an oscillator configured to generate an output signal indicative of the resonant frequency. The resonant frequency is modulated by the resonator temperature.

Abstract: Shaft seal for sealing a shaft against a housing of a motor vehicle, comprising a shaft sealing ring having a sealing lip for sealing the shaft against the housing, characterised in that a labyrinth seal is arranged upstream of the shaft sealing ring on the oil side thereof.

Abstract: Shaft seal for sealing a shaft against a housing of a motor vehicle, comprising a shaft sealing ring having a sealing lip for sealing the shaft against the housing, characterised in that a labyrinth seal is arranged upstream of the shaft sealing ring on the oil side thereof.

Abstract: A method for producing a metallic contact structure for making electrical contact with a photovoltaic solar cell, wherein, in order to create the contact structure, a paste, which contains metal particles, is applied to a surface of a carrier substrate via at least one dispensing opening, wherein the dispensing opening and the carrier substrate are moved in relation to one another during the dispensing of the paste. The paste is circulated in a circulating region, and in each case a part of the paste is branched off out of the circulating region at a plurality of branching points and each branching point is assigned at least one dispensing opening, via which the paste branched off at the branching point is applied to the surface of the carrier substrate, wherein the paste flows through a flow path having a length of less than 1 cm in each case between being branched off out of the circulating region and being dispensed from the dispensing opening assigned to the branching point.

Abstract: A method for producing a metallic contact structure for making electrical contact with a photovoltaic solar cell, wherein, in order to create the contact structure, a paste, which contains metal particles, is applied to a surface of a carrier substrate via at least one dispensing opening, wherein the dispensing opening and the carrier substrate are moved in relation to one another during the dispensing of the paste. The paste is circulated in a circulating region, and in each case a part of the paste is branched off out of the circulating region at a plurality of branching points and each branching point is assigned at least one dispensing opening, via which the paste branched off at the branching point is applied to the surface of the carrier substrate, wherein the paste flows through a flow path having a length of less than 1 cm in each case between being branched off out of the circulating region and being dispensed from the dispensing opening assigned to the branching point.

Abstract: A method for producing a metal structure on a surface of a semiconductor substrate, including the following steps: A applying a metal layer, B applying a structuring layer and C removing the structuring layer. Either step B is carried out after step A, and step C after step B in a masking method, so that the structuring layer covers the metal layer at least partially and, after step B is carried out, the metal layer is removed from the regions not covered by the structuring layer, before step C is carried out or, in a lift-off method, step A is carried out after step B, and step C after step A, so that the structuring layer is covered essentially by the metal layer and, at least in the regions, in which the metal layer covers the structuring layer, the metal layer is detached when step C is carried out. It is essential that the structuring layer in step B is produced by a hot melt ink.