Linxens Holding

Rhone-poulenc-graphic

Yannick De Maquille

Cyril Proye

Bertrand Hoveman

Francois Lechleiter

Mara Coppola

Marcel Pigeon

Fabien Marcq

Séverine Dieu-Gomont

Pierre-Alois Welsch

Pierre-Aloïs Welsch

François Lechleiter

Sébastien Fourgeot

The invention relates to a method for manufacturing an electrical circuit board. It includes the provision of a sheet of electrically conductive material and a layer of adhesive material. In order to have a color appear in spaces cut or etched into the sheet of electrically conductive material, the adhesive material includes a coloring agent. The invention also relates to an electrical circuit board for a smart card, which circuit board is manufactured using this method, and a smart card including such an electrical circuit board.

Method for manufacturing an electrical circuit board, electrical circuit board obtained by this method and smart card comprising such an electrical circuit board

The inventions relates to a method of manufacturing a circuit incorporating a solid state light emitting component, the method including providing an insulating layer, producing at least one through hole in the insulating layer, providing a conductive layer, bonding a main surface of the conductive layer to the insulating layer, and positioning at least one solid state light emitting component in the hole of the insulating layer and connecting this component to the conductive layer.

Circuit for a light emitting component and method of manufacturing the same

A method of making a presensitized lithographic plate is disclosed wherein a steel support having a tin-plated layer is depassivated and coated with a photosensitive product. Depassivation is accomplished by immersion of the support in an electrolytic bath of sodium carbonate. The electrolysis is performed with the support as a cathode and reversed so that the support is an anode of the bath. Preferably, the bath is an aqueous solution of 50 grams per liter of sodium carbonate at a temperature of 65.degree. C. with a current density of the bath being approximately 2.5 amperes per dm.sup.2. It is also contemplated that the depassivated tin-plated layer may be coated with copper before application of the photosensitive product. This can be accomplished by immersion in an electrolytic bath of copper cyanide. Preferably, the copper cyanide bath is at a temperature of 65.degree. C. with immersion occurring for approximately 3 minutes with the support in the cathode position and having a current density of 2.5 amperes per dm.sup.2. This results in a copper coating of approximately 3-4 microns in thickness. The copper coating may be passivated before the photosensitive product is added by a coating of aqueous benzotriazole solution. The photosensitive product may be a diazo resin of the orthoquinone diazide type condensed with a formophenolic resin. Over the diazo resin, after development a firing solution which is subsequently annealed may be added. Alternatively, the depassivation of the tin-plated layer may be accomplished by wet brushing in the presence of an aqueous pounce solution followed by impregnation with a hydrochloric acid and stannous chloride solution.

Lithographic plate of tin-plated steel and method of manufacture

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Paris, France

Yannick De Maquille