Methods and systems for coating of semiconductor devices using droplets of wavelength conversion or phosphor particles in a liquid medium. The upper metal line includes a diffusion barrier, which is made of a stack of a first WNx layer, a WCyNx layer and a second WNx layer. A plastic sleeve is formed, heated, and stretched until it has a size sufficient to ensleeve the endoprothesis. In the printer, processing which is the inverse of processing carried out in processing means of the digital camera and inverse AWB processing which is the inverse of the first AWB processing is carried out on the output image data, and inverse AWB image data which can be regarded as the original image data are obtained. The invention also relates to a polishing method in which the polishing means move in a tracking motion so as to track the outer surface of the part to be polished, and to apparatus for implementing the polishing method.