A process for manufacturing a wire, comprising at least the following steps: a. providing a wire precursor comprising a copper core with a surface and a coating layer superimposed over the surface of the copper core, wherein the coating layer comprises aluminium, wherein the ratio of the arithmetic mean of the thickness of the coating layer to the arithmetic mean of the diameter of the copper core is in the range of from 0.05 to 0.2, wherein the ratio of the standard deviation of the diameter of the copper core to the arithmetic mean of the diameter of the copper core is in the range of from 0.005 to 0.05, and wherein the ratio of the standard deviation of the thickness of the coating layer to the arithmetic mean of the thickness of the coating layer is in the range of from 0.05 to 0.4, wherein the wire precursor has a diameter in the range of from 0.5 to 5 mm, wherein each of the above arithmetic means is determined from at least 15 measurements at the wire precursor, wherein for each of the at least 15 measurements a cross-sectional cut through the wire precursor is made perpendicular to a maximum elongation of the wire precursor, b. shaping the wire precursor, c. annealing the wire precursor, whereby the wire is obtained, wherein the wire has a diameter in the range of from 100 μm to 600 μm, wherein the annealing is performed at a temperature in the range of from 140 °C to 400 °C over a period of from 30 minutes to 5 hours, wherein an intermediate layer is formed in step c. a. providing a wire precursor comprising a copper core with a surface and a coating layer superimposed over the surface of the copper core, wherein the coating layer comprises aluminium, wherein the ratio of the arithmetic mean of the thickness of the coating layer to the arithmetic mean of the diameter of the copper core is in the range of from 0.05 to 0.2, wherein the ratio of the standard deviation of the diameter of the copper core to the arithmetic mean of the diameter of the copper core is in the range of from 0.005 to 0.05, and wherein the ratio of the standard deviation of the thickness of the coating layer to the arithmetic mean of the thickness of the coating layer is in the range of from 0.05 to 0.4, wherein the wire precursor has a diameter in the range of from 0.5 to 5 mm, wherein each of the above arithmetic means is determined from at least 15 measurements at the wire precursor, wherein for each of the at least 15 measurements a cross-sectional cut through the wire precursor is made perpendicular to a maximum elongation of the wire precursor, wherein the ratio of the arithmetic mean of the thickness of the coating layer to the arithmetic mean of the diameter of the copper core is in the range of from 0.05 to 0.2, wherein the ratio of the standard deviation of the diameter of the copper core to the arithmetic mean of the diameter of the copper core is in the range of from 0.005 to 0.05, and wherein the ratio of the standard deviation of the thickness of the coating layer to the arithmetic mean of the thickness of the coating layer is in the range of from 0.05 to 0.4, wherein the wire precursor has a diameter in the range of from 0.5 to 5 mm, wherein each of the above arithmetic means is determined from at least 15 measurements at the wire precursor, wherein for each of the at least 15 measurements a cross-sectional cut through the wire precursor is made perpendicular to a maximum elongation of the wire precursor, b. shaping the wire precursor, c. annealing the wire precursor, whereby the wire is obtained, wherein the wire has a diameter in the range of from 100 μm to 600 μm, wherein the annealing is performed at a temperature in the range of from 140 °C to 400 °C over a period of from 30 minutes to 5 hours, wherein an intermediate layer is formed in step c.