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US 5,395,651 AGranted
Deposition of silver layer on nonconducting substrate
AssigneeAd Tech Holdings Limited
InventorsBilly V. Sodervall, Thomas Lundeberg
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AssigneeAd Tech Holdings Limited
InventorsBilly V. Sodervall, Thomas Lundeberg
Estimating the term…
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.
A method to prepare an antimicrobial medical device, which medical device comprises a nonconducting material having coated on at least a portion of the surface area thereof an adhesive, thin, uniform, transparent, antimicrobial, biocompatible coating consisting essentially of silver metal in combination with one or more platinum group metal or gold metal or both platinum group metal and gold metal, which method comprises
A method to prepare an antimicrobial medical device, which medical device comprises a nonconducting material having coated on at least a portion of the surface area thereof an adhesive, thin, uniform, antimicrobial, biocompatible coating consisting essentially of silver metal in combination with one or more platinum group metal or gold metal or both platinum group metal and gold metal, which method comprises
Dependencies are inferred from the claim text.