摘要:
The present invention relates to a system and a process for producing improved quality electrodeposited and/or treated metal or metal alloy foil to be used in electrical and electronic applications. The quality of the foil being produced and/or treated by the system is improved by providing each treatment tank in the system with a dual filtration system. The dual filtration system for each tank comprises a filter conditioning loop for substantially continuously withdrawing solution from the tank and removing particulate matter from the withdrawn solution and a system for removing surface impurities from the solution. In a first embodiment, the surface impurities removing system comprises an off-line solution filtration and replenishment system. In a second embodiment, the surface impurities removing system comprises a skimmer floating on the surface of the solution. The present invention has particular utility in systems for producing electrodeposited and/or treated copper foils.
摘要:
The present invention relates to a system and a process for producing improved quality electrodeposited and/or treated metal or metal alloy foil to be used in electrical and electronic applications. The quality of the foil being produced and/or treated by the system is improved by providing each treatment tank in the system with a dual filtration system. The dual filtration system for each tank comprises a filter conditioning loop for substantially continuously withdrawing solution from the tank and removing particulate matter from the withdrawn solution and a system for removing surface impurities from the solution. In a first embodiment, the surface impurities removing system comprises an off-line solution filtration and replenishment system. In a second embodiment, the surface impurities removing system comprises a skimmer floating on the surface of the solution. The present invention has particular utility in systems for producing electrodeposited and/or treated copper foils.
摘要:
The present invention relates to a system for aligning a plurality of rollers in a metal or metal alloy foil production line. The alignment system comprises a reference frame having a longitudinal dimension parallel to the direction of foil travel through the production line and an optical alignment system movably mounted to the frame. The optical alignment system comprises a laser beam generator, beam splitters and a mirror for generating an orthogonal reference frame for aligning each foil contacting roller in the production line.
摘要:
A process and apparatus for producing metal foil comprises supplying an isotopically polished continuous cathode, a high volume turbulent flow of electrolyte and rigorous filtration to exclude chlorides, sulfides, organics and other impurities from the electrolyte. The foil so produced is free from micro-voids and able to withstand substantially higher biaxial stresses than conventional electrodeposited foil. The micro void free structure also decreases the diffusion rate of an underlying substrate.
摘要:
The present invention relates to a technique for improving the tarnish and oxidation resistance of copper and copper base alloy materials. The technique of the present invention involves immersing the copper or copper base alloy material in a dilute aqueous chromic acid-phosphoric acid solution. After emerging from the chromic acid-phosphoric acid solution, the copper or copper base alloy material is preferably rinsed with a dilute aqueous caustic solution and dried. Copper and copper base alloy materials treated in accordance with the present invention have particular utility in printed circuit applications.
摘要:
The present invention relates to a treatment for improving the adhesive properties of metallic foils to be used in electrical and electronic applications. The treatment of the present invention comprises applying a light substantially uniform layer of metal to at least one surface of the metallic foil just prior to the formation of a plurality of dendritic structures on the surface. The metal layer renders the surface or surfaces to be treated more uniformly electrochemically active and consequently more receptive to the subsequent dendritic treatment. The treatment of the present invention has particular utility in improving the adhesive properties of wrought copper and copper alloy foils. An apparatus for performing the present treatment is also described.
摘要:
An electrolyte solution for the electroforming of metal foil, such as copper, is provided. The electrolyte contains an effective concentration of chloride ions to promote the formation of a uniformly matte surface finish. Foil so formed forms a strong mechanical bond with a dielectric substrate during a subsequent lamination process.
摘要:
The present invention relates to a process and apparatus for forming a substantially uniform electrodeposit on a metal or metal alloy foil. The apparatus includes a frame assembly for substantially preventing bowing and/or flapping of the metal or metal alloy foil and for promoting substantially uniform electrodeposits by maintaining the gap between the foil and each treatment anode substantially constant. The process and apparatus have particular utility in the treatment of delicate copper foil for use in electronic and electrical applications.
摘要:
The present invention relates to a heat exchanger assembly having a plurality of heat exchange fluid passageways formed from a modified copper-zinc alloy. The copper-zinc alloy contains from about 21% to about 39% zinc, from about 1% to about 5% nickel, from about 0.02% to about 1% arsenic and the balance essentially copper. In a preferred embodiment, the copper-zinc alloy consists essentially of from about 25% to about 35% zinc, from about 2.5% to about 3.5% nickel, from about 0.03% to about 0.06% arsenic and the balance essentially copper. The heat exchanger assemblies of the present invention have particular utility as motor vehicle radiators.
摘要:
A process and apparatus for treating a metal foil to enhance its ability to be bonded to a substrate comprise immersing the metal foil in an electrolytic cell having an electrolyte bath solution containing copper and applying a current having regularly recurring pulses and preferably flowing in only one direction to the cell. The current causes a dendritic layer of copper to be deposited on at least one surface of the metal foil at a first current density and bonded thereto at a second current density. The process and apparatus are particularly suited for treating copper foil.