In recent years,dedication towards the commercialization of CIGS solar cellsbecame popular worldwide.However,fundamental obstacles to commercializationsuch as cell and module production yields,reproducibility and large size uniformityare severe.Since 2003,we have published a series of our research work,in which thefirst one was steps toward industrialization of Cu-III-VI2 thin film solar cells:a novelfull-in-line concept and the second work was published as preliminary steps towardindustrialization of Cu-III-VI2 thin film solar cells:development of an intelligentdesign tool for non-stoichiometric photovoltaic materials.The in-line sputtering andselenization at elevated temperatures became industrial standard,while sputtering isideal for large-area film depositions,but control and manipulation of the film localcompositional distributions (not to mention the layer by layer composition variations),i.e.deviation of stoichiometry during production is particularly difficult.