Abstract: A process for producing laminated capacitors includes stacking of metallized plastic films. It includes a step of winding of at least one pair of metallized plastic films, this step being separated into three phases, a first phase of making finishing turns and during which the films are demetallized so that their superposition does not lead to any additional capacitance in the final component, a second phase of superposing the films so that they contribute to the capacitance of the final component and during which the films are demetallized near their edges, and a third phase intended to perform finishing turns under the same conditions as during the first phase, wherein the demetallizations of the films occurring in the successive phases are performed by etching.

Abstract: In a method for the manufacturing or a foil capacitor, cut out into unit blocks by a circular saw blade from a capacitive strip, the saw blade rotates about an axis passing through a point of rotation that is offset with respect to the center of the saw blade. The method can be applied to the manufacture of capacitors with metallized dielectric films.

Abstract: A method of producing at least one non-metallized strip on metallized flexible plastic film rolls and a method of producing stacked or wound capacitors using such rolls.One feature of the process of producing at least one non-metallized strip is that the said non-metallized strip is produced by a laser beam applied to the lateral face of a roll at a non-zero angle of incidence .alpha..

Abstract: The object of the invention is a lead frame for electrolytic capacitor anodes characterized by the fact that it comprises, for each anode to be connected, a tab with near its free end a window, the said window being sufficiently large to stop the rise by capillary action which can occur during manufacture of electrolytic capacitors.

Abstract: In a method for the manufacture of stacked or wound type capacitors, made by the stacking and cutting out into unit blocks or by the winding of metallized polyethylene naphthalene films, at least after the stacking phase for the stacked type capacitors or the winding phase for the wound type capacitors, the capacitors are subjected to at least one annealing operation at a temperature of 240.degree. C. to 295.degree. C. for a period of at least one hour. The method can be applied notably to the making of chip capacitors for SMC mounting.

Abstract: A package for the encapsulation of an electronic component (50) includes a bottom (40), lateral faces (41) positioned around a main axis of the package and an open face (42) opposite the bottom (40). Each lateral face (41) includes guides (48) for guiding connection wires (45) of the component (50). These guides (48) are distributed evenly around the main axis of the package. The sides of the bottom (40) are equal.

Abstract: Disclosed is a foil capacitor made by the stacking of metallized films. The multiple-layer type output plate has intermediate layers made of alloys of the layers that are contiguous to them. Also disclosed is a method for the manufacture of the capacitor, wherein the intermediate layers are formed by the spraying of molten metal.

Abstract: A composition based on zinc oxide for low and medium voltage varistors which contains additional elements in the form of oxides, where the oxides are contained in the composition in accordance with the following percentages by weight:______________________________________ 2.5 .ltoreq. Sb.sub.2 O.sub.3 .ltoreq. 4.5 0.8 .ltoreq. Co.sub.3 O.sub.4 .ltoreq. 1 0.4 .ltoreq. NiO .ltoreq. 1 0 < Cr.sub.2 O.sub.3 .ltoreq. 0.8 0.6 .ltoreq. Mn.sub.3 O.sub.4 .ltoreq. 0.8 4.2 .ltoreq. Bi.sub.2 O.sub.3 .ltoreq. 4.6 0.05 .ltoreq. PbO .ltoreq. 0.15 0.001 .ltoreq. SiO.sub.2 .ltoreq. 0.005 0.001 .ltoreq. Al.sub.2 O.sub.3 .ltoreq. 0.002 0.04 .ltoreq. B.sub.2 O.sub.3 .ltoreq. 0.

Abstract: Disclosed is a device to convey parts towards one or more processing stations and to remove them therefrom. This device includes a rail forming a continuous closed circuit and supporting a series of supports which are in contact with the rail by rollers, at least one of which is elastically biased against the rail. Each support is provided, at least at one of its ends, with a ball bearing or roller bearing, by which each support comes into contact with the support that precedes it or follows it. Preferably, the rail has a section with two opposite cants, and it is elastically gripped between rollers having a groove with a shape that matches the cants. Thus, precise positioning is obtained in the transversal direction of each support with respect to the rail, and the ball bearings provide precise contact, with low wear and tear, between two successive supports. This provides for accurate positioning also in the longitudinal direction.

Abstract: Disclosed is a multilayer type composite structure that withstands shocks and is formed by an alternation of layers made of a first material and a second material, the first material having a higher coefficient of thermal diffusivity than the second material. The distribution of the layers and their thickness are such that, in the thickness of the structure, there are zones formed by an alternation of layers of the first material and of the second material, these zones being separated from one another by a thick layer made of the second material.

Abstract: A method of manufacturing the pole pieces and the gap of magnetic heads in thin layers for computer, audio and video applications, starting from a silicon substrate, includes formation of an insulator layer on a silicon substrate followed by deposition of a metal layer on the insulator layer and of a masking resin layer on the metal layer. The substrate covered with the insulator layer and the metal layer is etched to form wells bordering a bar of a determined width and the left-over portion of the metal layer etched is removed. The etched substrate is thermally oxidized to develop a silicon oxide layer enabling the bar to be adjusted to obtain the desired gap. A conductive layer is deposited at the bottom of the wells followed by the electrolytic deposition of a magnetic material in the wells and the removal of the left-over portion of the insulator layer initially deposited on the substrate.

Abstract: The invention concerns a single-track or multiple-track reading and/or writing head. The magnetic head comprises, for one magnetic track, two pole pieces separated by a gap (15), each being housed in a mounting made of a non-magnetic material, the pole pieces and the mounting having a common plane defining the active face of the head. The magnetic head further comprises an element (26) for closing the magnetic circuit supporting at least one coil (27).

Abstract: A stacked or coiled type of metallized flexible dielectric film capacitor is made by the direct superimposition of at least two metallized films, laterally offset with respect to one another so as to form alternating even-order and odd-order layers, designed to be connected to one another by lateral electrical connections. One of the faces of the films is entirely metallized and the gap between two same-order layers is filled with an insulator material itself covered by the lateral electrical connections.

Abstract: Disclosed is a method for the fabrication of wire anodes for electrolytic capacitors, the wires being obtained by the compacting of a wire, made of anodizable material, in the cavity of a compression sleeve under the effect of a piston, the wire going through the piston from one side to the other along the axis to its movement and through the sleeve by passing into its cavity. Also disclosed is a device for the implementation of the method.

Abstract: A process of manufacturing an apparatus incorporating a layered thin film structure, wherein said process more particularly obviates the need to repeat on a first part of the apparatus the effects of certain operations required to produce the second part formed by the layered thin film structure. For this purpose, the process consists of utilizing a substrate to produce an intermediate assembly (12) comprising the thin film structure (11), then attaching the intermediate assembly (12) to the first part (10), then at least partially eliminating the intermediate substrate (13).

Abstract: A transfer and connection strip for anodes of electrolytic capacitrs for in situ fabrication of electrolytic capacitors includes a main part and tabs for each anode to be connected thereto. Each tab includes a first portion made of the same metal as the anodes and a second portion made of material of good soldering quality.

Abstract: The disclosure concerns the fabrication, by chemical process, of a ceramic material belonging to the system:Ba.sub.x Sr.sub.1-x (Ti.sub.u Zr.sub.v Hf.sub.w)O.sub.3The fabrication method comprises the following steps:preparation of an alcohol solution containing at least one titanium, zirconium or hafnium alcoholate,preparation of a determined quantity of hydrated barium hydroxide and/or hydrated strontium hydroxide in solid state;under violent shaking, dissolving of the hydroxide or hydroxides in the alcohol solution, and continuing of the reaction until a paste is obtained,drying of the paste obtained.

Abstract: The disclosure concerns the fabrication of film capacitors of the stacked or coiled type. These capacitors, shaped like a block, are made with films supporting at least one metallization. They have two metal plates placed on two opposite lateral faces of the block. These plates are formed by at least two pads. One of the pads of each plate is used to apply a severe electrical treatment. These pads are obtained by making a notch in the plate or by masking during the metallization of the plate. The disclosure is applicable to film capacitors capable of undergoing a severe electrical treatment without loss of capacitance.

Abstract: The invention concerns a method for the detection of the end of grinding of at least one thin layer magnetic head, the head comprising, at the stage of implementation of said method, an active face, formed by two magnetic poles (1, 2) separated by a gap (4). The method comprises the following steps:deposition of a conductive layer (7) on the entire active face (3)etching of the active face coated with said conductive layer;deposition of a layer of dielectric material (8) on the etched active face;grinding of the active face starting from the face that is free of the layer of dielectric material (8) until total removal of that part of the conductive layer (7) located above the gap (4), this removal being detected by the sudden variation in resistivity between the two magnetic poles (1, 2).

Abstract: Metallized dielectric film is employed to manufacture capacitors. In order to attach a certain number of inactive layers to the capacitors, the method comprises a stage which consists in displacing the layers laterally during the winding operation in order to obtain a determined thickness of inactive layers, the lateral displacement causing the prevention of the connection of the metallizations of the films to the lateral Schoop coatings.