摘要:
Described is a method of forming a solder deposit on a substrate comprising the following steps i) provide a substrate that includes at least one inner contact area, ii) contact the entire substrate area including the at least one inner contact area with a solution suitable to provide a conductive layer on the substrate surface, iii) form a patterned resist layer, iv) electroplate a solder deposit layer containing a tin or tin alloy onto the inner contact area, v) remove the patterned resist layer, vi) form a solder resist layer having solder resist openings on the substrate surface.
摘要:
A process for the preparation of electrodes for use in a fuel cell comprising a membrane electrode assembly with a negative and a positive electrode is described, said process comprising the following steps: (i) providing an electrode substrate and (ii) coating said substrate electrolytically from a plating bath with a metal layer, said metal being selected from Ag, Au, Pd and its alloys.
摘要:
A method for the regeneration of etching solutions containing iron for the use in etching or pickling copper or copper alloys and an apparatus for carrying out the method is described. The method involves feeding the etching solution to be regenerated from the etching system into an electrolysis cell being hermetically sealed or having an anode hood (8), the electrolysis cell comprising a cathode (1), an inert anode (2), means (3) for removing the electrolytically deposited copper from the cathode and means (4) for collecting the removed copper and applying a potential to the removed copper, wherein the electrolysis cell does not have an ion exchange membrane or a diaphragm.
摘要:
The regulation of the concentration of metal ions in an electrolyte, for the electrolytic separation of metals, containing additional substances of an electrochemically reversible redox system is conventionally achieved by passing at least a part of the electrolyte through an auxiliary cell, comprising an insoluble auxiliary anode (20) and at least one auxiliary cathode (30), between which a flow of current is generated by application of a voltage. Excess amounts of the oxidised material from the redox system are thus reduced at the auxiliary cathode (30) and the formation of ions of the metal to be separated is avoided. According to the invention, pieces of the metal to be separated (30) are used as the auxiliary cathode.
摘要:
A method for the regeneration of etching solutions containing iron for the use in etching or pickling copper or copper alloys and an apparatus for carrying out the method is described. The method involves feeding the etching solution to be regenerated from the etching system into an electrolysis cell being hermetically sealed or having an anode hood (8), the electrolysis cell comprising a cathode (1), an inert anode (2), means (3) for removing the electrolytically deposited copper from the cathode and means (4) for collecting the removed copper and applying a potential to the removed copper, wherein the electrolysis cell does not have an ion exchange membrane or a diaphragm.
摘要:
The invention relates to a method of depositing a layer of metal and to a method of regenerating a solution containing metal ions in a high oxidation state. To regenerate tin ions consumed from a tin plating solution by metal deposition, it has been known in the art to carry the plating solution over metallic tin to cause tin (II) ions to form. However, the amount of tin contained in thus regenerated baths slowly and continuously increases. The solution to this problem is to utilize an electrolytic regeneration cell that is provided with at least one auxiliary cathode and with at least one auxiliary anode. Tin serving for regeneration is electrolytically deposited from the solution onto the at least one auxiliary cathode in the electrolytic regeneration cell. The solution is carried over the tin serving for regeneration in order to reduce formed tin (IV) ions to tin (II) ions.