摘要:
A composition for chemical copper plating having a pH of 12 to 14 and containing a boron hydride compound serving as a reducing agent, a water-soluble copper compound and a copper complexing agent, the composition being characterized in that the copper complexing agent is at least one of hydroxyalkyl-substituted ethylenediamines represented by the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are the same or different and are each unsubstituted lower alkyl or hydroxyl- and/or carboxyl-substituted lower alkyl, and at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is hydroxyl-substituted lower alkyl, and hydroxyalkyl-substituted diethylenetriamines represented by the formula ##STR2## wherein R.sub.5, R.sub.6, R.sub.7 and R.sub.8 are the same or different and are each unsubstituted lower alkyl or hydroxyl-and/or carboxyl substituted lower alkyl, R.sub.9 is hydrogen or unsubstituted lower alkyl or hydroxyl-and/or carboxyl-substituted lower alkyl, and at least one of R.sub.5, R.sub.6, R.sub.7, R.sub.8 and R.sub.9 is hydroxyl-substituted lower alkyl.
摘要:
A method for depositing a metal on a surface is disclosed. The method comprises treating the surface with a sensitizing solution comprising at least a reducible salt of a non-noble metal and a radiation-sensitive reducing agent for the salt to form a sensitized surface. The sensitized surface is exposed to a source of light radiation to reduce the metal salt to a reduced metal salt species. Either or both of the preceding sensitizing or radiation exposing steps is restricted to a selected pattern on the surface to form a catalytic real image capable of directly catalyzing the deposition of a metal thereon from an electroless metal deposition solution. The catalytic real image is treated with a stabilizer comprising (a) a reducing agent for the non-noble metal ions of said reducible salt, (b) a complexing agent and (c) an accelerator to at least stabilize the catalytic real image.
摘要:
A process for pretreating polyvinyl chloride plastics to form adherent non-grainy conformal metal coatings by electroless deposition comprising immersing the polyvinyl chloride plastic in a solution comprising at least about 10 grams of alkali metal hydroxide dissolved in a solution consisting of about 5% to about 30% by volume of a water-soluble mono-, di-, or polyhydric alcohol and about 70% to about 95% by volume of water. The immersion time is variable from about 5 minutes in ultrasonically agitated, mildly heated solutions to about 6 to about 8 hours in non-agitated, unheated solutions. After pretreatment, the polyvinyl chloride plastic is treated by standard electroless plating procedures known in the art.
摘要:
A ceramic electric resistor and a method for making the same. The resistor has a body which is formed of a material having a Perovskite structure with semiconducting doping and on its surface is contacted with two layers of different materials. The first layer is palladium or in association with palladium chloride and the second layer is one from a group of nickel, nickel-phosphorus or nickel-boron alloys. The process includes stoving-in the palladium or palladium chloride solution and providing a given composition of nickel bath for the second layer.
摘要:
This invention is an improved method for conducting electroless metal-plating processes in a metal tank which is exposed to the plating bath. The invention solves a problem commonly encountered in such processes: how to determine when it is advisable to shutdown the process in order to clean and/or re-passivate the tank.The new method comprises contacting the bath with a current-conducting, non-catalytic probe and, during plating operations, monitoring the gradually changing difference in electropotential between the probe and tank. It has been found that the value of this voltage is indicative of the extent to which nickel-bearing decomposition products accumulate on the tank. By utilizing the voltage to determine when shutdown for cleaning is advisable, the operator can avoid premature shutdown and at the same time avoid prolonging operations to the point that spontaneous decomposition occurs.
摘要:
A cured epoxy polymer having improved adhesive properties is disclosed. The epoxy polymer is the reaction product of a mixture comprising a resin component comprising (a) a diglycidyl ether based upon linoleic dimer acid, (b) an elastomerically modified epoxy resin blend and (c) a diglycidyl ether of bisphenol A and/or bisphenol F and a suitable curing agent. The reaction mixture is heated at a suitable temperature for a period of time sufficient to attain a full cure of the epoxy.
摘要:
A method is disclosed for the generation of circuit patterns on a polyimide type of substrate by preconditioning the substrate's surface with a hydrazine/caustic solution, depositing a catalyst on the surface treated polymer, and exposing the polymer with the catalyst thereon to a bath having a metal therein capable of deposition electrolessly on the polymer surface containing catalyst.
摘要:
The present invention provides copper (I) ion compound bath solutions for the catalytic sensitization and metallization by electroless metal deposition of non-metallic surfaces, as well as processes for the application and re-claiming of said solutions.
摘要:
Electroless, polymetallic nickel alloys containing an element of boron or phosphorus and one or more metals selected from tin, tungsten, molybdenum or copper which have unique properties and are produced as a plated deposit in an electroless nickel plating bath containing an ester complex of polyhydric acid or alcohol such as the diboron ester of glucoheptonic acid.