The deposition of superconducting Nb3 Sn on copper accelerating cavities is interesting for
the higher thermal conductivity of copper compared to common Nb substrates. The better heat
exchange would allow the use of cryocoolers reducing cryogenic costs and the risk of thermal
quench [1]. The magnetron sputtering technology allows the deposition of Nb 3 Sn on substrates
different than Nb, however the coating of substrates with complex geometry (such as elliptical
cavities) may require target with non-planar shape, which are difficult to realize with classic
powder sintering techniques. In this work, the possibility of using the Liquid Tin Diffusion
(LTD) technique to produce sputtering targets is explored. The LTD technique is a wire
fabrication technology, already developed in the past at LNL for superconducting radio
frequency (SRF) applications [2], that allows the deposition of very thick and uniform coating
on Nb substrates even with complex geometries [3]. Improvements in LTD process, proof of
concept of a single use LTD target production, and characterization of the Nb 3 Sn film coated
by DC magnetron sputtering with these innovative targets are reported in this work
