A sealing system has a gasket which in the undeformed state can be placed against a component to be sealed. The present invention also discloses a de-jittering apparatus for implementing the above-mentioned method, which includes: a circuit for generating a control signal and a controllable frequency divider. One feature of the invention is that a plasma treatment is performed before forming a wiring or the like by a dropping method typified by an ink-jetting method. Using a first phase shift mask having line-and-space patterns, the photoresist layer is exposed, forming first exposure regions. The compositioncoating acts as a self-cleaning coating so it reduces a adsorption of dirt, other contaminants, muddy water, etc.