The present invention relates to novel amides and a process for preparing these amides. The image processing apparatus selects a dither matrix that has a higher resolution in a case that the received zoom level is equal or less than a first zoom level to reduce the image data. Alternatively, a front section of the backside region includes a step with a thickness greater than the second pole tip region. Flight safety is thus significantly reinforced. The attachment element have a first surface, a second surface and a plurality of perforations having edges.