Micro fabrication on cylinder surface for control of wettability

A micro fabrication is presented to control wettability on cylinder surfaces. A machine tool is developed to form the micro-scale structure on the cylinder in incremental stamping. The stamping tool is manufactured with fabricating the micro-scale structure on the top of the tool in FIB sputtering. The micro incremental stamping is repeated with linear motion of the tool and rotation of the workpiece. The rotation is controlled by the friction drive on the machine table because of the stable stamping with reducing bending of the workpiece. The critical stamping depth, the minimum depth in which the structure is formed, is determined in the forming tests using the structured tool. Then, a stripe type structure is formed to control wettability on the cylinder surface. Anisotropic wettability appears on the structured surface.

► We present a micro fabrication on cylinder surfaces in incremental stamping.
► Surface structure is controlled with the structured tool made by FIB sputtering.
► The critical stamping depth is determined by the preliminary tests.
► Surface functions are controlled with the surface structures.
► Anisotropy in wettability is controlled on the structured surface manufactured.