Abstract:
A resin material is brought into contact with a first solution containing ozone, and at the same time, ultraviolet rays are irradiated. The activation due to the treatment with ozone water and the activation due to the treatment with ultraviolet rays are synergistically operated to enable the formation of a plated coating having excellent adhesive strength by a short treatment. In addition, even by a long treatment, the adhesive strength can be restrained from lowering. Consequently, a plated coating having excellent adhesion can be formed without roughening the surface of the resin material by a short pretreatment.
Abstract:
A polymeric resin of adjustable viscosity and pH for depositing catalytic palladium on a substrate, comprising in combination a palladium salt, a complexing agent of the carboxylic acid or chloride type, a water soluble polymer containing hydroxyl and/or carboxyl groups, an alkaline compound and a solvent chosen amongst water, methanol and ethanol, its preparation method and applications.
Abstract:
A process for the formation of a plated through-hole printed circuit board comprising treating a circuit board base material as follows:1. condition with an oxidant solution;2(A). contact with a copper etchant that etches copper and neutralizes oxidant residues on the surface to be plated; and2(B). contact with a conditioner that conditions the board surface for enhanced catalyst adsorption; or2(A). contact with a neutralizer for oxidant residues that neutralizes said residues and conditions the board surface for enhanced catalyst adsorption; and2(B). contact with a copper etchant; and3. catalyze the board; and4. plate electroless metal onto catalyzed surfaces from a plating solution containing a source of halide ions in a concentration of at least 0.1 moles per liter of solution.The process is characterized by the absence of a step of acceleration and contains fewer processing steps than prior art processes.
Abstract:
There is provided a new process for the production of printed circuits. The process comprises coating a base with a layer of copper, nickel, cobalt or iron salts or salt compositions, which on exposure to radiant energy, such as heat, light, etc., thermal or chemical reducing agents are converted to a layer of metal nuclei that is non-conductive, but which is capable of catalyzing the deposition of metal onto the base from an electroless metal deposition solution in contact with the metal nuclei.
Abstract:
In the art of treating plastic surfaces to improve the adhesion of paints or metals thereto wherein the surface is treated with a strong mineral acid solution containing hexavalent chromium, the adhesion is improved by adding to the acid solution from 0.1 to 6 percent by volume of a petroleum fraction boiling between 80* C. and 240* C. which is rich in branched chain aliphatic hydrocarbons and alicyclic hydrocarbons, olefins containing a neopentyl group, or carboxylic acids containing a neopentyl group.
Abstract:
AQUEOUS DILUTE SURFACTANT SOLUTIONS ARE EMPLOYED IN THE TREATMENT OF PLASTIC SUBSTRATES TO PREPARE THEM FOR ELECTROLESS PLAING TO ENSURE COMPLETE COVERAGE OF THE SUBSTRATE SURFACE BY THE METAL. THE SUBSTRATES ARE IMMERSED IN THE SUFACTANT SOLUTION AS A PRELIMINARY STEP IMMEDIATELY PRECEDING THE ACTIVATION OF THE SUBSTRATE IN THE NORMAL CYCLE OF ELECTROLESS PLATING OPERATIONS, SUPPLANTING VARIOUS OTHER PRE-ACTIVATION STEPS AND, UNLIKE SUCH PRIOR STEPS, BEING OPERATIVE FOR ALL TYPES OF SYNTHETIC RESINS ENCOUNTERED IN ELECTROLESS PLATING OPERATIONS.
Abstract:
A method for reducing adhesion between a maskant and a substrate, wherein the maskant is adhered to a surface of the substrate, the method comprising applying a composition to the maskant.
Abstract:
The invention relates to a process for coating plastic surfaces with metals, especially plastic surfaces composed of acrylonitrile/butadiene/styrene copolymers (ABS) and composed of mixtures of these copolymers with other plastics (ABS blends), using an etch solution (composition C) comprising at least one ionic liquid IL, wherein the process comprises the treating of the plastic surface after the etching with an aqueous rinse solution RS while applying ultrasound.
Abstract:
A method for selectively metallizing one or more through-holes, other openings (such as slots), or edges of an electronic circuit package comprising the steps of forming a layer of seeding solution on a drilled surface of a substrate of interest exposing this layer to light of appropriate wavelength, through a mask that does not completely cover the through-holes or openings and thereby results in the formation of metal seed on regions of the substrate surface corresponding to the regions of the layer of seeding solution exposed to light; removing the unexposed regions of the layer of seeding solution by subjecting the exposed and unexposed regions of the layer of seeding solution to an alkaline solution. Thereafter, additional metal is deposited, e.g., plated, onto the metal seed using conventional techniques. Significantly, this method does not involve the use of a photoresist, or of a corresponding chemical developer or photoresist stripper. Of additional significance, this method yields plated through-holes or other openings, each of which can accommodate multiple wires, rather then the traditional one wire per through-hole.