Copper/ceramic composite
AssigneeHeraeus Deutschland GmbH & Co. KG
InventorsKai Herbst, Christian Muschelknautz, Alexander Rogg
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Abstract
The invention relates to a copper/ceramic composite comprising—a ceramic substrate which contains aluminum oxide, —a coating which lies on the ceramic substrate and which is made of copper or a copper alloy, wherein the copper or the copper alloy has a particle size number distribution with a median value d50, an arithmetic mean value darith, and a symmetry value S(Cu)=d50/darith; the aluminum oxide has a particle size number distribution with a median value d50, an arithmetic mean value darith, and a symmetry value S(Al2O3)=d50/darith; and S(Al2O3) and S(Cu) satisfy the following condition: 0.7≤S(Al2O3)/S(Cu)≤1.4.
Claims14
A copper-ceramic composite comprising:
- a ceramic substrate containing aluminum oxide, and
- a coating composed of copper or a copper alloy present on the ceramic substrate, wherein
- the copper or the copper alloy has a number distribution of the grain sizes having a median d50, an arithmetic mean darith and a symmetry value S(Cu)=d50/darith,
- the aluminum oxide has a number distribution of the grain sizes having a median d50, an arithmetic mean darith, and a symmetry value S(Al2O3)=d50/darith,
- and S(Al2O3) and S(Cu) satisfy the following condition:
- 0.7≤S(Al2O3)/S(Cu)≤1.4.
Dependencies are inferred from the claim text.