Abstract: A microcooler with channels through which coolant flows. The channels are formed by individual cooler layers having a region which is structured in the manner of a screen and having a plurality of openings with edge lines closed and with material bridges or material regions remaining between these openings. None of the openings on any of the cooler layers form a continuous channel which extends from a collection space for feed of the coolant to a collection space for drainage of the coolant. The individual breaches, and the material bridges or material regions, provided between them are offset from cooler layer to cooler layer such that flow of the coolant through the cooler is possible only with continuous changing of the layers. Using the breaches within the cooler results in a highly branched labyrinth through which coolant flows.

Abstract: An arched metal-ceramic substrate with one ceramic layer and with a metal coating provided on the top and bottom of the ceramic layer which is curved around at least one axis parallel to the plane of the substrate such that it forms a convexly curved surface on the bottom. The thickness of the metal coatings on the top and bottom of the arched ceramic layer is the same.

Abstract: A method of producing a ceramic-metal substrate, in which a cooper foil is superficially attached on at least one surface side of a ceramic layer a first metal layer formed by a metal foil, preferably a copper foil. The ceramic layer is then slit after applying the first metal layer, by removing the material of the ceramic layer down to first metal layer. At least one slit at a time is then made in the ceramic layer along at least two edges of the ceramic layer and at a distance from these edges, and extends over the entire length of the edge so that on either side of each slit there is a first ceramic layer section which has the respective adjacent edge and another ceramic layer section. The width of the slit is at least equal to twice the thickness of the ceramic layer. The metal layer is bent 180.degree.

Abstract: A multiple substrate is provided having a large area individual base layer with multiple substrates, for electrical circuits formed thereon. Individual substrates are defined by score lines in the base layer, and include a fragment of the base layer and at least one metal coating is provided on at least one surface of the fragment and has areas which stabilize the multiple substrates against unwanted breaking. Several individual substrates are preformed along peripheral sides of the base layer, and at least one metal coating on each individual substrate projects over the peripheral side.

Abstract: A process for producing a metal coated substrate with an improved resistivity to cyclic temperature stress is provided. The substrate is provided with at least one insulating layer and at least one metal layer attached to at least one side of the insulating layer. The metal layer is made at least 0.2 millimeters thick, and is weakened in places by openings formed in at least one border area.

Abstract: A metal coated substrate with improved resistivity to cyclic temperature stress is provided. A metal layers is attached to an insulating layer having a thickness of 0.2 mm. The metal layer is formed in a border area and is weakened by openings disposed in two rows. The depth of the openings nearer the border are greater than the depth of the openings in the tow farther from the border. The distance between the bottoms of the openings in the first row and the insulating layer is less than 1/3 of the thickness of the metal layer, and the distance between the bottom of the second row of openings and the surface of the insulating layer is 1/3 to 1/2 the thickness of the metal layer.

Abstract: A metal coated substrate with improved resistivity to cyclic temperature stress is provided. A substrate has at least one insulating layer and at least metal layer attached to at least one side of the insulating layer. The metal layer is at least 0.2 millimeters thick, and is weakened in places by openings formed in at least one border area.

Abstract: A process is provided where a ceramic metal substrate is produced by attaching metal foils on either side a ceramic layer to form metal layers and for producing a through connection by placing metal in an opening to form a bridge so that the metal layers are electrically connected together by direct bonding, and a metal body is inserted into the opening to almost fill it, while a surface of the metal body is provided with a layer with chemical compound of metal and reactive gas.

Abstract: For the manufacture of a power semiconductor module, one proceeds from a ceramic base board on which copper plates and copper conductor paths are fastened by a suitable method. The ceramic base plate is then scratched and broken. As a result, ceramic side boards are produced which are connected to the base board via conductive paths. The side boards are then swung up, as a result of which the conductive paths fastened on the side boards come into a plane above the base plane. By means of suitable, possibly multiple, breaking and folding of the side boards and suitable development of the ends of the conductive paths, the connecting poles of the power semiconductor chips can be directly contacted. Electronic circuits can be arranged on the side boards.

Abstract: A multilayered substrate for printed circuit boards of electrical circuits, said substrate consisting of copper and ceramic layers which are joined together by the DBC method into said multilayered substrate, with each copper layer being formed by a copper sheet and each ceramic layer being formed by a ceramic plate, at least two of said layers forming a layer sequence having a hollow section or core, said at least two layers being arranged essentially parallel to each other, said at least two layers being spaced apart from one another by an intermediate spacing layer.

Abstract: The temperature rise associated with the catalytic recombination of battery gases at the end of the charging process is converted into an electrical signal suitable for checking and controlling charging, in a temperature-sensitive component such as a commercially available NTC or PTC resistor coated with a PTFE-bound palladium-activated carbon mixture. An additional activated carbon layer protects the catalyst from poisoning by the stibine present in the battery gases.

Abstract: A printing attachment for a rotary printing press comprises first and second cooperating cylinders rotatably mounted on respective first and second shafts. The first shaft is supported by holding devices for movement by a power operated device and the second shaft is mounted on a frame. Each shaft has at each end a support member, such as an annular or disc-shaped member, which faces a respective support member on the other shaft. Each support member on the first shaft can be brought into contact with a respective support member on the second shaft as well as into contact with one of a pair of parallel arranged further support members, at spaced positions along the first support members, by the power operated device to engage the first cylinder. The position of at least one pair of support members is adjustable to alter the operating position of one cylinder relative to the other.

Abstract: A machine for punching or pressing sheet material comprises a support base, a stationary machine member and a machine member which is rectilinearly displaceable relative thereto for the working movement. At least one such member is fitted with a tool and in order to produce the working movement, a wedge is displaceable transversely to the direction of the said movement in a reciprocatory manner by means of a drive provided between the base support, or a member connected thereto, and the displaceable machine member, or a member connected thereto. The load transmitting surfaces on the wedge and the load transmitting surfaces facing the same on the adjacent support base and displaceable member are formed by hardened body-surfaces.