Heraeus Deutschland Gmbh & Co Kg

Sven Thomas

Eugen Milke

Peter Prenosil

Martin Schneider-Ramelow

Ute Geissler

A wire, preferably a bonding wire for bonding in microelectronics, contains a copper core with a surface and coating layer containing aluminum superimposed over the surface of the copper core. The ratio of the thickness of the coating layer to the diameter of the copper core is from 0.05 to 0.2 &#x3bc;m. The wire has a diameter in the range of from 100 &#x3bc;m to 600 &#x3bc;m and specified standard deviations of the diameter of the copper core and of the thickness of the coating layer. The invention further relates to a process for making a wire, to a wire obtained by the process, to an electric device containing at least two elements and the wire, to a propelled device containing the electric device, and to a process of connecting two elements through the wire by wedge bonding.

Aluminum coated copper bond wire and method of making the same

The invention is related to a bonding wire containing a core having a surface. The core contains aluminum as a main component and scandium in an amount between 0.05% and 1.0%.

Aluminum alloy wire for bonding applications

A ribbon, preferably a bonding ribbon for bonding in microelectronics, contains a first layer containing copper, a coating layer containing aluminum superimposed over the first layer, and an intermediate layer. In a cross-sectional view of the ribbon, the area share of the first layer is from 50 to 96% and the aspect ratio between the width and the height of the ribbon in a cross-sectional view is from 0.03 to less than 0.8. The ribbon has a cross-sectional area of 25,000 &#x3bc;mto 800,000 &#x3bc;m. The intermediate layer contains at least one intermetallic phase containing materials of the first and coating layers. The invention further relates to a process for making a wire, to a wire obtained by the process, to an electric device containing the wire, to a propelled device comprising said electric device and to a process of connecting two elements through the wire by wedge-bonding.

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Frankfurt-am-Main, Germany

Sven Thomas