Ion Track Technology

PhysicsConsult

Reimar Spohr

PostHeaderIcon Abstract

Application of ion track membranes for preparation of metallic microstructures; J. Vetter, R. Spohr. Nucl. Instrum. Meth. Phys. Res. vol. B79, pp. 691-694, (1993).

Polymer membranes with etched particle tracks are used as a matrix to prepare microwhiskers. For this purpose a thin metal film is sputtered on the bottom side of the etched membrane. The sputtered layer serves as cathode in an eiectrolytic cell. After galvanic replication the membrane matrix is separated from the replica either by peeling it off or by an organic solvent. In this way it is possible to generate large stochastic whisker arrays with almost identical individual whiskers with lengths between 10 and 100 µm and diameters down to 0.5 µm. As every impinging ion leads to exactly one elementary microstructure, track replication may provide an economic alternative for the production of well-defined metal whiskers in various appIications.