Abstract: An aluminium alloy plate is provided with a thickness of more than 2 inches, e.g. 6, 7 or 8 inches, and having an average logarithmic fatigue life of more than 100,000 cycles determined in accordance with ASTM test method E 466. The density of micropores with a size larger than 80 .mu.m in all locations in the midplane (T/2) midwidth position at head and tail ends of the finished plate as measured by Optical Microscopy of samples in any plane perpendicular to the midplane is less than 0.025 micropores per cm.sup.2. The plate may be formed by degassing of a melt to give a specified porosity of the cast ingot, and by hot rolling with at least one specified high reduction ratio pass.

Abstract: In order to achieve damage-tolerant properties and sufficient isotropy of aluminum alloys, particularly of type AlLi 8090, subsequent especially to hot-forming of a bar of said aluminum alloy there is interposed a solution heat treatment and quenching, followed by working and subsequent intermediate annealing within a temperature range of from 250.degree. to 475.degree. C. for a period of from 1 to 85 hours. The intermediate annealing is followed by cold forming and subsequent solution heat treatment with the additional purpose of recrystallization, whereupon the recrystallized material is especially cold-formed to a degree of deformation of only up to 8%. Thereafter the sheets having a sheet thickness of from 0.5 to 10 mm are subjected to artificial aging.

Abstract: In the process described, the electronic circuits (2) for the signal processing and the sensor structures to which they are coupled are manufactured side by side on the common substrate (1). The process is characterized by the following steps: manufacture of the electronic circuits on the substrate (1) by known semiconductor techniques; application to the surface of the substrate (1) of a galvanic electrode layer (7), which may or may not be structured; application on the substrate surface containing the electrode layer of an X-ray resist layer (8), the thickness of which corresponds to a characteristic height of the sensor structures to be produced; production of negatives (10, 11) of the sensor structures in this resist layer (8) by X-ray lithography: galvanic deposition of a metal (12, 13) or a metal alloy in the negatives (10, 11) of the sensor structures using the galvanic electrode layer; division of the substrate with the sensor structures applied thereto into separate functional units or chips.

Abstract: A method of producing thin sheets that are stretched over a frame and have planar and smooth surfaces with a low density of defects, and to the use of such sheets for the production of X-ray masks, wherein the sheet material is applied to a substrate through the intermediary of a release layer, whereupon the sheet is connected with the frame and separated from the substrate. During application of the release layer to the substrate, an area along the entire edge of the substrate is left free of the release layer material but is convered by the subsequently applied sheet material. Thereafter the sheet is connected with the frame in a region overlying the release layer and is severed around the periphery of the frame. Finally, the sheet and frame are released from the substrate and any release layer material remaining on the sheet is removed. The resulting sheet and frame arrangement may then be used to form an X-ray mask by applying desired X-ray absorber structures to the surface of the sheet.

Abstract: A method of producing a plate-shaped bearing member for sliding bearings, the structure being composed of a patterned body of supporting bearing material and a lubricant, utilizing a galvanoplastic fabrication step, the method including: producing a mold provided with a pattern of recesses, the step of producing including performing an X-ray deep-etch lithography procedure; filling the recesses to form the body of bearing material; removing the mold from the body of bearing material so that spaces are left in the bearing material; and filling the thus produced spaces with the lubricant.