Patent ID: 7723158

Claim:
A method for producing and cleaning bases with external contacts for surface mounting on circuit mounts, the method comprising: electrodeposition onto a semiconductor wafer or onto semiconductor chips of the bases with external contacts; heat treatment of the bases at temperatures below the melting temperature of a material of the bases; traversing a rapid thermal process (RTP) high-temperature interval during which at least the melting temperature is reached, wherein the high-temperature interval is set to a period t H of 10 s≦t H ≦300 s, and there-after wet etching surfaces of the bases with external contacts by introducing an etchant after the rapid thermal process; and after the wet etching is carried out, surface mounting the semiconductor chips on the circuit mounts; wherein the heat treatment removes volatile substances and lasts for a heat treatment period t D , in the range of 0.5 h≦t D ≦5.0 h, and wherein the rapid thermal process is performed after the heat treatment of the bases at temperatures below the melting temperature of the material of the bases.