A METHOD AND APPARATUS FOR FORMING A RESISTANT PATTERN ON A CYLINDRICAL ART AND A METAL CYLINDER CREATED BY THE USE OF SUCH A RESISTANCE PATTERN.

摘要

Described are a process and device for forming a resist pattern on both the inner side and the outer side of a cylindrical object (20) with use of one or more laser beams. In the device the cylindrical object (20) is arranged such that it may be rotatably driven while free access is left for the laser equipment to process the material layer on the inner and outer sufaces of the cylindrical object (20). Preferably use is made of one single laser (12) of which the beam is split using a beam splitter (13). Also is claimed an etched metal cylinder which is obtained by etching a metal cylinder (20) using an etching resistance pattern on the inside and outside and formed with use of the claimed process.