Method of plating the surface of a substrate
First Claim
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1. A method of plating a dielectric surface of a substrate comprising the steps of:
- (a) coating the substrate with a solution comprising a silver-pyridine complex dissolved in a non-aqueous solvent;
(b) drying the substrate;
(c) immersing the substrate in a basic solution whereby the silver-pyridine complex is converted to a silver oxide; and
(d) reducing the silver oxide to metallic silver.
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Abstract
A substrate is plated by a process which includes the steps of catalyzing a substrate by coating its surface with a silver-pyridine complex dissolved in an organic solvent, converting the complex to silver oxide by immersion in a basic solution, and reducing the silver oxide to metallic silver and then electroless plating. When the substrate is copper, the silver oxide is spontaneously converted to a reflective and continuous layer of metallic silver upon immersion in the basic solution. The process as disclosed is used in the manufacture of insulated conductors and cord from nylon filaments.
22 Citations
32 Claims
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1. A method of plating a dielectric surface of a substrate comprising the steps of:
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(a) coating the substrate with a solution comprising a silver-pyridine complex dissolved in a non-aqueous solvent; (b) drying the substrate; (c) immersing the substrate in a basic solution whereby the silver-pyridine complex is converted to a silver oxide; and (d) reducing the silver oxide to metallic silver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 23, 24)
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21. A method of spontaneously plating a continuous, reflective layer of silver on a substrate comprising the steps of:
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(a) coating the substrate with a solution comprising a silver-pyridine complex dissolved in a non-aqueous solvent; (b) drying the substrate; and (c) immersing the substrate in a basic solution, whereby the silver-pyridine complex is directly converted to a continuous reflective silver layer. - View Dependent Claims (22)
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25. A method of making an insulated conductor comprising the steps of;
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(a) immersing a substrate, selected from the group consisting of a continuous, dielectric fiber bundle, in a solution comprising a silver-pyridine complex dissolved in a non-aqueous solent; (b) drying the fiber bundle; (c) immersing the fiber bundle in a basic solution whereby the silver-pyridine complex is converted to a silver oxide; - View Dependent Claims (27, 28, 29, 30, 32)
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26. (d) reducing the silver oxide to metallic silver;
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(e) electroless plating the fiber bundle; (f) electroplating the fiber bundle; and (g) insulting the fiber bundle.
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31. A method of making an insulated conductor comprising the steps of:
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(a) coating a continuous length of non-twisted nylon yarn with a solution comprising a silver-pyridine complex dissolved inl a non-aqueous solvent, (b) drying the yarn at between 102°
to 114°
C.,(c) converting the silver-pyridine complex to silver oxide by treating with a basic solution, (d) reducing the silver oxide to metallic silver by heating at a temperature from about 165°
to 170°
C.,(e) electroless plating the yarn with a conductive metal, (f) electroplating the yarn with a conductive metal, (g) twisting the plated yarn, and (h) insulating the twisted yarn.
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Specification