Loading patent…
AssigneeKM Europa Metal AG
InventorsChristian Triquet, Wolfgang Denke, Stefan Hoveling, Stefan Priggemeyer
Estimating the term…
A copper strip or sheet having a red-brown to dark brown cover layer. The cover layer includes a first layer of Cu.sub.2 O which adheres to the base metal, with a thickness in the range of 0.05 to 5 .mu.m, preferably in the range of 0.1 to 1 .mu.m, and a second layer of CuO arranged on top of the first layer, with a thickness between 1 and 100 nm, preferably with a thickness between 10 and 50 nm. The cover layer is applied by heat treating the copper base to form a Cu.sub.2 O layer, followed by a second heat treatment to form a CuO layer. Alternatively, the cover layer is applied by heat treating the copper base in an oxygen containing atmosphere followed by treatment with an aqueous solution of a salt which produces an alkali reaction. The resulting copper strip or sheet of the invention is well suited for use in the construction sector.
A copper strip or sheet with a red-brown to dark brown cover layer, comprising a copper base and a cover layer disposed on the copper base, the cover layer including a first layer consisting essentially of Cu.sub.2 O adhering to the copper base, with a thickness of 0.05 to 5 .mu.m, and a second layer consisting essentially of CuO arranged on top of the fist layer of Cu.sub.2 O, with a thickness between 1 and 100 nm.
A method for the producing a brown cover layer on a strip-shaped semi-finished copper product comprising the steps of:
A method for producing a brown cover layer on a strip-shaped semi-finished copper product, comprising the steps of:
Dependencies are inferred from the claim text.