Process for producing a thin-film solar module and separating means for use in this process

Process for producing of a thin film solar module (10) including a plurality of CdS/CdTe solar cells (11) arranged side-by-side on a common substrate (12), which are produced by employing a plurality of layer deposition steps and layer separation steps during cell production and which are electrically interconnected with one another, characterized by

• (a) applying a first contact layer (14) on said substrate (12),
• (b) subdividing said first contact layer (14) into cells defined by a cell structure,
• (c) applying a pn double layer (16) of CdS/CdTe on said first contact layer (14), wherein said first contact layer (14) has a higher hardness than said pn double layer (16), and
• (d) mechanically separating said pn double layer (16) by using a scraping cutting tool (30) which serves as separation means for cutting by scraping the cell structure into said pn double layer, wherein said cutting tool (30) has a flattened tip (40) with a plane sliding surface (41) which engages said substrate (12), and said cutting tool (30) is moved relative to said substrate, wherein said cutting tool (30) is guided so that said plane sliding surface (41) engages said first contact layer (14) parallel to said substrate to scrape said cell structure into said pn double layer (16).