Silver plating in electronics manufacture
OwnerYung-Herng Yau, Thomas B. Richardson +6inventors
InventorsYung-Herng Yau, Thomas B. Richardson, Joseph A. Abys, Karl F. Wengenroth, Anthony Fiore, Chen Xu, Chonglun Fan, John Fudala
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Abstract
Compositions and methods for silver plating onto metal surfaces such as PWBs in electronics manufacture to produce a silver plating which is greater than 80 atomic % silver, tarnish resistant, and has good solderability.
Claims20
A plating composition for Ag plating a metal surface, the composition comprising a source of Ag ions, water, and a modulating agent, wherein the composition has a pH below about 3 and an ionic content such that the composition has a room temperature conductivity below about 10 mS/cm.
A plating composition for Ag plating a metal surface, the composition comprising a source of Ag ions, water, and a modulating agent, wherein the composition has a pH below about 3 and an ionic content such that the composition has a room temperature conductivity below about 25 mS/cm.
Dependencies are inferred from the claim text.