Abstract: A method using one or several successive coatings of an active device (63), (64) by means of a synthetic resin (72);the resin used is on the basis of a product of the family of ethoxy bisphenol A dimethacrylates, to which is added a photo-initiator compound producing radicals by photo-scission or by intermolecular abstraction of hydrogen at a concentration lying between 0.2 and 3% and preferably near 1%, which is then irradiated by ultra-violet radiation (76), as the case may be through a transparent mould (70);Application: coating of semiconductor devices and more particularly optoelectronic devices.

Abstract: A multi-path interrupter device (e.g. joystick) includes a housing 10 constituted by two parts (11, 12), a plurality of interrupters 16 distributed along a circle and a control member 20. The control member is formed of a single piece of resilient material and has a lever pin 21 held on a pivot 25 carried by the housing. The control member 20 includes a peripheral crown 23 arranged to act on the interrupters 16. The member 20 also includes resilient return means for biasing the member to a central rest position.The return means includes tongues 30 cut radially out of the control member 20, the flexible end of these tongues bearing on the lateral surface of a truncated cone 28 carried by the part 12 of the housing, which cone 28 forms an opening for passing the pin 21.

Abstract: The invention relates to a method of manufacturing a plastic record carrier, in particular a video disc, in which a mold is provided with a fluid molding resin. A substrate is then deformed into a convex shape and pressed against the resin disposed on the center of the mold. The molding resin is rolled over the surface of the mold with a circular fluid front while the shape of the substrate is simultaneously changed from convex to planar form. After the molding resin has been spread over the entire mold and the planar substrate bears against the resin layer, the molding resin is then cured. The substrate is preferably deformed by flexibly supporting a planar substrate about its edge and then applying a different gas pressure on both sides of the substrate. The molding resin is preferably radiation-curable and is cured by exposure to, for example, ultra-violet light through the substrate.