IL28631A - Chemical plating - Google Patents

Description

IMPROVEMENTS TO CHEMICAL This invention concerns relating the chemical plating or deposition of metal upon surfaces of dielectric or poorly conducting the purposes such it has been proposed that the surface should first be treated with a solution a A process of this is described and claimed in the Specification of British Sperry Gyroscope Company of the present invention is to enable the step of treating the surface with a catalytic salt to be without the necessity for using expensive volatile According to the a dielectric or poorly conducting surface is treated with an aqueous solution of a catalytic salt in the presenc of ultrasonic vibration and is thereafter chemically plated with a In this wetting of the surface by the solution can be effectively achieved and a metal can be directly plated upon the surface of a plastics for in a reliable and inexpensive fashion which lends itself to the requirements of the ultrasonic vibration is applied to the container in which the body to be plated is treated by simple immersion in the catalytic A frequency within the range of 20 to kilocycles per second will generally be A period of exampl minutes will normally sufficteat wetting of every part of the is not of ca be chemicall deposited upon a dielectric surface after are palladium and The catalytic salt for be nickel chloride or stannous the salt depending upon the al to be As one of a practical application of the reference may be made to electrical particularly I the condenser for instance of can onto the for instance polyester in very simple It importance in this case that voids between the dielectric and the metal can be effectively prevented and an electrically efficient condenser thus The invention can be applied with advantage the plating of articles having irregular as well as plane or other relatively simple It can applied to the plating of filaments the like for linen and using otherwise known The invention can be applied not only the plating of surfaces materials which are themselves but again employing otherwise upon surface for example oxide surface of metals such as aluminium and this surface of already first known It is treated with an aqueous of a catalytic for palladium the presence of ultrasonic as whereafter a thin for of is deposited aay required for nickel is or are electroplated upon said thin layer in conventional insufficientOCRQuality

Claims (1)

1. ROW particularly described ascertained the of my invention and in what manner is to X declare that what claim A method for plating a surface of a dielectric or treating the surface with an aqueous solution of a salt in the of ultrasonic nd thereafter chemically plating the with the met A method as claimed in 1 wherein surface is a surface of body of plastics material the metal is directly plated upon said A method claimed in wherein no drying ste is interposed between the treatment with the solution and the method as claimed in any one of 1 to 3 wherein the ultrasonic vibration is applied fee a container in which the material is treated by simple immersion in the method as claimed of claims to 4 wherein the material is the dielectric o a condenser which is plated on opposite sides to form the condenser A method as claimed in an one of claims 1 to wherein the material is of a thread or filament A method as claimed in any one of c 1 to wherein the material comprises method 7 layer layers of A method claimed wherein the is the layer layers A upon a of a dielectric A by the any the preceding Dated this Twelfth day of 8eptember insufficientOCRQuality