Disclosed is a cleaning device, a cleaning method and an image forming apparatus applied with the cleaning device and the cleaning method. This semiconductor device has a fine multi-layered wiring structure of high performance and remarkably improved reliability. The detailed claim information display has fields to edit the associated detailed claim information. The catalyst may be a platinum catalyst. The novel chemical mixture for removing or stripping copper comprises an ammonium salt, an amine, and water. According to the invention, step d) is carried out by means of a pulley supported upstream of said collecting spool and rotated about the fiber drawing axis, said optical fiber being wound up onto said pulley for an angle of at least about 360.