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Selective plating techniques

The accurate deposition of precious metals to selected areas of a component saves resources and cost.

Auric Metal Finishers employ many techniques that are delivered by the range of advanced plating technology machines installed into the reel to reel lines configured with hard gold, soft gold, silver, palladium or tin (satin matte) plating.

The simplest form of selective plating is to deposit metal either as a single stripe or in multiple parallel stripes along the length of the reel. This can be on a base material of plain strip, or part blanked and fully stamped component strips that are passed around 450 or 750mm diameter MECO wheel units.

Spot plating is a technique where we use custom built tools to deposit metal to a specific area of a component. For example, applying gold to only the critical contact surfaces of electrical connectors where areas as small as 0.2/0.3mm diameter can be achieved.

A further method allows plating to be applied to either one or two faces of bandolier mounted pin type components, meaning that only the outer contact surfaces are coated with savings in precious metal by not coating the inner sides. Some open tooling is available.

Complex 3D dimensional components can be plated selectively using a 'contour plating' technique to apply in a method that is as selective as brush plating, but with the advantages of positive masking and guidance, having a high speed deposition rate and without the usual brush head problems.

Whisker mitigating tin technology

In some applications where tin coated components are used, 'whisker growth' is recognised as a potential problem. Tin coatings available at Auric Metal Finishers have been approved for use to mitigate such growth.

Metal Finishing Equiprment

 

   
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