Back to results
US 4,358,922 AGranted
Metallic articles having dual layers of electroless metal coatings incorporating particulate matter
AssigneeSurface Technology, Inc.
InventorNathan Feldstein
Life of this patent
Estimating the term…
Abstract
Disclosed are processes and articles for composite electroless coatings comprising at least two distinct layers, the first layer comprising a metal and/or a metal alloy plus particulate matter and the second layer comprising a metal and/or a metal alloy and being substantially free of particulate matter.
Claims39
A metallized article produced by the steps comprising:
- (1) contacting said article with an electroless plating bath further comprising insoluble suspended particulate matter to provide a composite layer comprising a member selected from the group consisting of a metal, a metal alloy, and mixtures thereof, and the insoluble particulate matter,
- (2) contacting said treated article with an electroless plating bath to provide a layer comprising a member selected from the group consisting of a metal, a metal alloy, and mixtures thereof, said layer being substantially free of particulate matter substantially covering the particulate matter exposed from step 1, and subsequently
- (3) removing a portion of the electrolessly deposited layer deposited in step 2 thereby providing a smoother surface finish in comparison to the surface finish after step 1, however retaining a sufficient amount of electroless metal from step 2 to substantially cover the particulate matter exposed from step 1.
A process for the metallization of a substrate comprising the steps:
- (1) contacting said substrate with an electroless plating bath further comprising insoluble suspended particulate matter to provide a composite layer comprising a member selected from the group consisting of a metal, a metal alloy, and mixtures thereof, and the insoluble particulate matter,
- (2) contacting the treated substrate with an electroless plating bath to provide a layer comprising a member selected from the group consisting of a metal, a metal alloy, and mixtures thereof, said layer being substantially free of particulate matter substantially covering the particulate matter exposed from step 1, and subsequently
- (3) removing a portion of the electrolessly deposited layer deposited in step 2 thereby providing a smoother surface finish in comparison to the surface finish after step 1, however retaining a sufficient amount of electroless metal from step 2 to substantially cover the particulate matter exposed from step 1.
Dependencies are inferred from the claim text.