A method of fabricating a printhead having a hydrophobic ink ejection face is provided. The coatings comprise a fluorinated polymer and a biologically beneficial polymer, an example of which includes poly-block poly-block poly. This printing method attains sharp images of line-drawing including a text image. The movable range variation means is configured to expand a movable range of the steps according to weight applied to the steps, whereby an additional movable range is added to the movable range, said movable range is determined by the step driving means. The current invention is aimed at communications and signal processing applications such as equalization, interference suppression of CDMA systems, echo cancellation and beamforming with antenna arrays.