Production of surface-modified cu ribbons for laser bonding
AssigneeHeraeus Deutschland GmbH & Co. KG
InventorsMarcel NEUBAUER, Frank KRÜGER
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Abstract
The invention relates to a method for producing a wire, having at least the following steps: (i) providing a wire precursor; (ii) pressing depressions on the wire precursor and optionally reshaping the wire precursor in the process, and (iii) annealing the wire precursor provided with depressions in order to form the wire; wherein the wire has a content of at least 95 wt. % of copper based on the total weight of the wire. The invention additionally relates to a wire which can be obtained according to the aforementioned method and to the use of a roller in order to produce the wire and/or in order to set the roughness at at least one location of the wire.
Claims18
A method for producing a wire, comprising at least the following steps:
- (i) providing a wire precursor;
- (ii) pressing depressions on the wire precursor;
- and
- (iii) annealing the wire precursor provided with depressions in order to obtain the wire;
- wherein the wire has a content of at least 95 wt. % of copper, the content being based on the total weight of the wire.
A use of a roller comprising a relief for producing a wire, wherein the relief has a height difference in a range from 3 to 9 μm, wherein depressions are introduced by the roller at least one location of the wire.
The use of a roller comprising a relief for setting the roughness Rz at least one location of a wire in a range from 3 to 9 μm, wherein the relief has a height difference.
Dependencies are inferred from the claim text.