Electroplating composition for depositing a chromium or chromium alloy layer on a substrate
AssigneeAtotech Deutschland GmbH
InventorsOleksandra YEVTUSHENKO, Anke WALTER, Simon PAPE
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Abstract
The present invention refers to an electroplating composition for depositing a chromium or chromium alloy layer on a substrate, said composition comprising (i) trivalent chromium ions, (ii) at least one complexing agent for the trivalent chromium ions, and (iii) at least one kind of oxide-hydroxide particles; a method for depositing a respective chromium and chromium alloy layer; a respective use of said particles; and respective substrates comprising such a chromium or chromium alloy layer.
Claims15
An electroplating composition for depositing a chromium or chromium alloy layer on a substrate, said composition comprising:
- (i) trivalent chromium ions,
- (ii) at least one complexing agent for the trivalent chromium ions, and
- (iii) at least one kind of oxide-hydroxide particles.
A method for depositing a chromium or chromium alloy layer on a substrate, the method comprising the following steps:
- (a) providing the substrate,
- (b) providing an electroplating composition for depositing a chromium or chromium alloy layer, the composition comprising:
- (i) trivalent chromium ions,
- (ii) at least one complexing agent for the trivalent chromium ions, and
- (iii) at least one kind of oxide-hydroxide particles,
- (c) contacting the substrate with said electroplating composition and applying an electrical current such that the chromium or chromium alloy layer is deposited on at least one surface of said substrate.
(canceled)
A substrate comprising a chromium or chromium alloy layer, the substrate further comprising
- optionally at least one pre-coating between the substrate and said chromium or chromium alloy layer, respectively,
- wherein the chromium or chromium alloy layer, respectively, comprises at least one kind of oxide-hydroxide particles.
A substrate comprising a chromium or chromium alloy layer, the substrate further comprising
- optionally at least one pre-coating between the substrate and said chromium or chromium alloy layer, respectively,
- wherein the chromium or chromium alloy layer, respectively,
- comprises carbon,
- has a L* value of 70 or less, defined by CIELAB, and
- has a thickness of 4 μm or more.
Dependencies are inferred from the claim text.