hexyl alcohol octyl alcohol etc inorganic solvents and mixtures thereof the organometallic compound thin film thus formed is exposed to light through a mask to decompose the organometallic compound to cause a difference of solubility between the exposed and unexposed areas that is the organometallic compound at the exposed area is transformed separation of ligands from metal atoms through electromagnetic radiation accelerates the decomposition of the organometallic compound finally the organometallic compound is transformed into a pure metal or a metal oxide depending on the atmosphere the photochemical reaction mechanism of the organometallic compound varies depending on the kind of metal and the ligands coordinated to the metals however it is generally contemplated that after bonds between the metals and the ligands are made unstable the bonds are cleaved and finally decomposed by action of a metal to ligand charge transfer a ligand to metal charge transfer a d d excitation state or intramolecular charge transfer light sources used for the electromagnetic radiation are preferably uv light but are not particularly limited in prior art methods the organometallic compound is continuously exposed to light until the organometallic compound is completely decomposed and transformed to a pure metal or metal oxide in the present invention however the organometallic compound is exposed to light to an extent that the organometallic compound at the exposed area is not dissolved in a solvent thereby minimizing the exposure time and thus increasing productivity of the metal micropattern this is one of the most important advantages of the present invention after exposure to light the unexposed area can be removed by being dissolved in the same.