Abstract: Process for producing strip-shaped and/or point-shaped electrically conducting contacts on a semiconductor component like a solar cell, includes the steps of applying a moist material forming the contacts in a desired striplike and/or point-like arrangement on at least one exterior surface of the semiconductor component; drying the moist material by heating the semiconductor component to a temperature T1 and keeping the semiconductor element at temperature T1 over a time t1; sintering the dried material by heating the semiconductor component to a temperature T2 and keeping the semiconductor component at temperature T2 over a time t2; cooling the semiconductor component to a temperature T3 that is equal or roughly equal to room temperature, and keeping the semiconductor component at temperature T3 over a time T3; cooling the semiconductor component to a temperature T4 with T4??35° C.

Abstract: The invention describes a process for preparing acetone starting from acetyl-coenzyme A comprising process steps A. enzymatic conversion of acetyl-CoA into acetoacetyl-CoA B. enzymatic conversion of acetoacetyl-CoA into acetoacetate and CoA and C. decarboxylation of acetoacetate to acetone and CO2, which is characterized in that the coenzyme A is not transferred in process step B to an acceptor molecule. In addition, process step B is surprisingly catalysed by enzymes of the classes of acyl-CoA thioesterase, acyl-CoA synthetase or acyl-CoA thiokinase. A completely novel metabolic pathway is concerned, because the enzymatic hydrolysis of acetoacetyl-CoA without simultaneous transfer of CoA to a receptor molecule has never previously been described for any microbial enzyme.

Abstract: The invention concerns etching and doping substances free of hydrochloric/fluoride acid used for etching inorganic layers as well as for doping subjacent layers. The invention also concerns a method wherein said substances are used.

Abstract: In a monitoring method and image processing apparatus for monitoring electronic transmission of an image, an image detector supplies an input image to a processing circuit that caches it in an image storage. The cached image, or an image derived therefrom, is forwarded as an output image to a viewing device, which outputs the image to a viewer. To monitor the image transfer, an insertion circuit upstream from the processing circuit inserts a dynamic input test signal into the input image. A test circuit downstream from the processing circuit tests whether the output image contains a dynamic output test signal corresponding with the input test signal. Given the absence of the dynamic output test signal, alarm notification is provided to the viewer.

Abstract: The present invention relates firstly to HF/fluoride-free etching and doping media which are suitable both for the etching of inorganic layers and also for the doping of underlying layers. The present invention secondly also relates to a process in which these media are employed.

Abstract: The invention relates to a method for constructing a layer structure on an especially fragile flat substrate. In order for thin, fragile flat substrates to be able to be subjected to refinement or construction of semiconductor components, a process is proposed with the steps: Applying an inorganic ceramic phase to the fragile substrate and subsequent heat treatment for hardening and sintering the inorganic ceramic material.

Abstract: In a monitoring method and image processing apparatus for monitoring electronic transmission of an image, an image detector supplies an input image to a processing circuit that caches it in an image storage. The cached image, or an image derived therefrom, is forwarded as an output image to a viewing device, which outputs the image to a viewer. To monitor the image transfer, an insertion circuit upstream from the processing circuit inserts a dynamic input test signal into the input image. A test circuit downstream from the processing circuit tests whether the output image contains a dynamic output test signal corresponding with the input test signal. Given the absence of the dynamic output test signal, alarm notification is provided to the viewer.

Abstract: The invention concerns etching and doping substances free of hydrochloric/fluoride acid used for etching inorganic layers as well as for doping subjacent layers. The invention also concerns a method wherein said substances are used.

Abstract: The invention relates to a method for constructing a layer structure on an especially fragile flat substrate. In order for thin, fragile flat substrates to be able to be subjected to refinement or construction of semiconductor components, a process is proposed with the steps: Applying an inorganic ceramic phase to the fragile substrate and subsequent heat treatment for hardening and sintering the inorganic ceramic material.

Abstract: A process for producing a cylinder having at least one longitudinally extending outward bulge and a steel base, for a piston-cylinder unit. The process including the steps of initially machining a round input ingot to size, the ingot having a length, subsequently heating the ingot to a deformation temperature between 1250° C. and 1310° C., descaling an entire surface of the heated ingot with pressurized water, subsequently inserting the ingot into a mold, piercing the ingot in a sharply increasing manner using a mandrel so as to form a pierced piece with a base, applying a lubricant to the mold and the mandrel prior to piercing, subsequently ejecting the pierced piece from the mold, cooling and descaling the ejected pierced piece, and mechanically finish-machining the pierced piece to produce the cylinder.

Abstract: A vertical strip storage device for bridging strip running interruptions in continuous strip production includes a supporting frame forming a looping tower. The continuous strip is looped around deflecting rollers mounted on upper and lower horizontal roller bridges. The roller bridges move synchronously and vertically, one above the other, toward and away from one another. The inherent weight of one roller bridge compensates for the inherent weight of the other roller bridge as a counterweight. A joint cable drive is used to move the roller bridges. One of the roller bridges is at the upward cable portion of the vertically deflected joint cable drive and the other roller bridge is at the downward cable portion of this vertically deflected joint cable drive. The joint cable drive includes pulley blocks supported in the upper region and in the lower region of the supporting frame.

Abstract: A device for limiting filling and for air admission to and discharge from tanks, in particular fuel tanks of motor vehicles, part of the tank volume being used as a pressure equalizing chamber (19) with regard to temperature fluctuations, has an air inlet and outlet device which opens out into the ventilatable filler neck (11, 110) and which comprises filling evacuation tubes (14) which determines the maximum liquid level (18) still regarded as permissible, and operating evacuation tubes (15, 16) with a closure device, which takes over air admission to and discharge from the pressure equalizing chamber (19), such that when the tank cap is removed, the operating evacuation tubes is closed by spring action (42, 133) and when the tank cap is on, it is opened by the cap itself against spring force.

Abstract: A device for emission-free sampling of volatile liquids comprises a 4-way tap from which lead two lines, which can be connected together, from and to the container holding the liquid to be tested and two other lines, which can also be connected together, lead to a sample bottle which can be sealed and which can be connected to the device. The device further comprises a supply line for an inert flushing medium, which joins the line leading into the sample bottle in the region of the sample bottle, and a discharge line for the inert flushing medium, which leads from the line coming out of the sample bottle in the region of the sample bottle and proceeds to a disposal system.

Abstract: The invention relates to a solar cell provided with an anti-reflection layer on the surface intended for incident light. The invention consists in the front interconnector being applied directly to the anti-reflection layer of insulating material, so that the charge carriers have to tunnel through this anti-reflection layer.

Abstract: An arrangement for limiting the filling of tanks and for aeration and ventilation of tanks in which a portion of the tank volume acts as a pressure-compensation space for temperature changes, has an aeration and ventilation arrangement opening into the aeratable and ventable filler neck, said arrangement having a filling vent which determines the maximum allowable liquid level and an operating vent to take over aeration and ventilation of the pressure-compensation space with a sealing arrangement, such that the operating vent is sealed off by the action of a spring when the tank cap is removed, and when the tank cap is attached, it is thereby opened against the spring pressure. Operating ventilation is controlled by a valve integrated into the aeration and ventilation line which valve can be actuated against spring resistance by a plunger rod.

Abstract: In a process for the production of a solar cell with a p-n junction and a conductive antireflection coating, there is deposited on a semiconductor body a first layer as a diffusion source for the production of the p-n junction and also for the doping of the antireflecting coating, and on the first layer a second layer for the production of the antireflection coating.

Abstract: The invention relates to a solar cell for exposure to light rays on both sides. The solar cell contains only one pn junction on one surface side of the semiconductor body. The base of the solar cell is uniformly and less strongly doped than the thin surface zone of the conduction type opposite to that of the semiconductor base. Both zones of the solar cell are in contact with a structured conduction path system on opposite surface sides.

Abstract: An exemplary embodiment comprises a spot film device, a transport mechanism for the transport of an image layer carrier from a ready position into an exposure position and back, and a speed control for the drive motor. A certain time interval which is essentially caused by the transport operations always lies between triggering an X-ray exposure and the actual exposure of the image layer. In order to facilitate release of the X-ray exposure at the proper point in time, the disclosure provides that the overall transport time of the image layer carrier from the ready position into the exposure position is kept constant independently of the mass to be transported. Additionally, the transport time can also be kept constant independently of the different length of the transport path given sequencing of a sub-division program. An inventive X-ray examination device is particularly suited for employment in X-ray diagnostics.