| 摘要 |
<p>A plastics, e.g. polyester, tape is coated with copper by first coating with a dispersion of iron particles in e.g. polyvinyl chloride, and then passing through a bath of e.g. (parts by weight) 30 copper sulphate, 6 sulphuric acid, 6 tartaric acid, and 6 trimethylaminoacetic acid. A further coating of silver may be applied by passing through a bath of a mercury salt and then an ammoniacal bath of potassium silver cyanide. An electroless nickel coating may be applied to the copper. The iron layer may be applied, whilst subjected to a magnetic field, and to form a pattern e.g. by a stencil. A copper coated plastics tape may be electroplated with Cd, Sn, Au, Ag or Co - Ni e.g. by passing the tape as a cathode through an aqueous solution (pH 5 to 6) of E.D.T.A., cadmium acetate, and HCl or tin chloride and E.D.T.A. or nickel sulphanate, cobalt chloride, and trimethylaminoacetic acid.</p> |
