Silver electrolyte for depositing dispersion silver layers and contact surfaces with dispersion silver layers
AssigneesRosenberger Hochfrequenztechnik GmbH & Co. KG, Dr.-Ing. Max Schlotter GmbH & Co. KG
InventorsAndreas Stadler, Robert Sottor, Reinhard Wagner, Christian Dandl, Sebastian Heitmüller
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Abstract
The invention relates to a silver electrolyte for the deposition of silver layers on substrates, which comprises potassium silver cyanide, potassium cyanide with a content of at least 10 g/L, at least one grain refiner with a content of 0.2 to 10 g/L, at least one dispersant with a content of 1 to 10 g/L and at least one solid component with a content of 1 to 150 g/L, wherein the particles of the solid component have an average particle size (d50) of 10 nm-100 μm. Furthermore, contact surfaces and methods for the deposition of such contact surfaces are shown.
Claims13
A contact surface, wherein an electrochemically deposited dispersion silver layer is arranged on a substrate,
- wherein the dispersion silver layer comprises particles of at least one finely dispersed solid component with a mean particle size (d50) of 1 μm-20 μm;
- wherein the dispersion silver layer comprises the at least one finely dispersed solid component in a content of 3.3 to 10 wt %, based on the total weight of the dispersion silver layer;
- and
- wherein the silver dispersion layer has a coefficient of friction p at 0.3 N after 100 cycles of less than 1.4 and a fretting life at 1.0 N of more than 7500 cycles;
- wherein the at least one finely dispersed solid component is selected from the group consisting of graphite, graphite fluoride, graphite oxide, diamond, Al2O3 coated graphite and mixtures thereof.
A contact surface, wherein an electrochemically deposited dispersion silver layer is arranged on a substrate,
- wherein the dispersion silver layer comprises particles of at least one finely dispersed solid component with a mean particle size (d50) of 1 μm-20 μm;
- wherein the dispersion silver layer comprises the at least one finely dispersed solid component in a content of 3.3 to 10 wt %, based on the total weight of the dispersion silver layer;
- wherein the silver dispersion layer has a coefficient of friction p at 0.3 N after 100 cycles of less than 1.4 and an electrical contact resistance at 1.0 N after 100 cycles of below 1.0 mΩ;
- and
- wherein the at least one finely dispersed solid component is selected from the group consisting of WS2, SnS2, NbS2, TaS2, hexagonal boron nitride, silver niobium selenide, TiN, Si3N4, TiB2, WC, TaC, B4C, Al2O3, ZrO2, cubic BN, MoSe2, WSe2, TaSe2, NbSe2, SiC, and Al2O3 coated WS2 and mixtures thereof.
A contact surface, wherein an electrochemically deposited dispersion silver layer directly contacts a substrate;
- wherein the dispersion silver layer comprises particles of one finely dispersed solid component with a mean particle size (d50) of 1 μm-20 μm;
- wherein the one finely dispersed solid component comprises WS2;
- wherein the dispersion silver layer comprises the one finely dispersed solid component in a content of 3.3 to 10 wt %, based on the total weight of the dispersion silver layer;
- and
- wherein the silver dispersion layer has a coefficient of friction p at 0.3 N after 100 cycles of less than 1.4 and an electrical contact resistance at 1.0 N after 100 cycles of below 1.0 mΩ.
Dependencies are inferred from the claim text.