Heraeus Deutschland Gmbh & Co Kg

Christian Muschelknautz

Kai Herbst

Alexander Rogg

Klaus Kunze

Aziz S Shaikh

Isao Tanaka

Roupen Keusseyan

Toshinori Wada

A copper-ceramic composite: includes a ceramic substrate containing alumina and a copper or copper alloy coating on the ceramic substrate. The alumina has a mean grain shape factor R(AlO), defined as the arithmetic mean of the shape factors R of the alumina grains, of at least 0.4.

Copper-ceramic composite

The invention relates to a copper-ceramic composite, comprising a ceramic substrate, which contains aluminum oxide, a coating on the ceramic substrate made of copper or a copper alloy, wherein the aluminum oxide has an average grain form factor R(AlO), determined as an arithmetic average value from the form factors of the grains of the aluminum oxide, the copper or the copper alloy has an average grain form factor R(Cu), determined as an arithmetic average of the form factors of the grains of the copper or copper alloy, and the average grain form factors of the aluminum oxide and copper or copper alloy meet the following condition: 0.5&#x2264;R(AlO)/R(Cu)&#x2264;2.0.

The invention relates to a copper-ceramic composite comprising: a ceramic substrate; and a copper or copper alloy coating on the ceramic substrate, the copper or copper alloy having grain sizes of 10 &#x3bc;m to 300 &#x3bc;m.

The invention relates to a copper/ceramic composite comprising&#x2014;a ceramic substrate which contains aluminum oxide, &#x2014;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 d, an arithmetic mean value d, and a symmetry value S(Cu)=d/d; the aluminum oxide has a particle size number distribution with a median value d, an arithmetic mean value d, and a symmetry value S(AlO)=d/d; and S(AlO) and S(Cu) satisfy the following condition: 0.7&#x2264;S(AlO)/S(Cu)&#x2264;1.4.

Copper/ceramic composite

The invention relates to an electro-conductive paste comprising Ag nano-particles and spherical Ag micro-particles in the preparation of electrodes, particularly in electrical devices, particularly in temperature sensitive electrical devices or solar cells, particularly in HIT (Heterojunction with Intrinsic Thin-layer) solar cells. In particular, the invention relates to a paste, a process for preparing a paste, a precursor, a process for preparing an electrical device and a module comprising electrical devices. The invention relates to a paste comprising the following paste constituents:

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Darmstadt, Germany

Christian Muschelknautz