The authors propose to use an Au-Al eutectic alloy to form rigid and low resistance contact to carbon nanotubes (CNTs). After depositing CNTs by dielectrophoresis to bridge the two Au/Al electrodes patterned on the SiO 2 /Si substrate, the authors annealed the substrate in air to induce eutectic melting. As proposed, the CNT contact was able to tolerate the ultrasonic washing for 90 s, and the contact resistance was lowered by a factor of as much as 10. Moreover, such a contact was demonstrated to be mechanically stable as it gave reproducible sensing properties after an ultrasonic washing process and it allowed to build a CNT cross-junction by using standard lithography and an electrophoresis step.