Coating processes – With pretreatment of the base – Preapplied reactant or reaction promoter or hardener
Patent
1998-05-04
1999-10-12
Talbot, Brian K.
Coating processes
With pretreatment of the base
Preapplied reactant or reaction promoter or hardener
427305, 427306, 427437, 4274431, B05D 304
Patent
active
059652047
ABSTRACT:
Metallic silver is deposited upon the surface of a nonconducting substrate using a multi-step wet deposition process. The surface is cleaned, and then activated in an aqueous solution containing stannous tin. The silver is deposited as a colloidal material from an aqueous solution of a silver-containing salt, a reduction agent that reduces the salt to form the metallic silver, and a deposition control agent that prevents the silver from nucleating throughout the solution. After the substrate is coated, the coating is stabilized in an aqueous solution of a salt of a metal from the platinum group or gold, dissolved in dilute hydrochloric acid. The process is particularly effective for depositing uniform films of 2 to 2000 Angstroms thickness, which strongly adhere to the substrate.
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Lundeberg Thomas
Sodervall Billy Valter
Ad Tech Holdings Limited
Talbot Brian K.
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