NOVELTY - A method for producing back contacts on silicon solar cells (100) and an interconnection between silicon solar cells (100), comprises: (a) attaching the solar cells (100) onto a transparent superstrate (104), thus forming a structure (120); (b) depositing a passivating layer (113) onto the back surface of the structure (120); (c) depositing a silicon material layer (108); (d) separating the silicon material layer (108); (e) providing contact sites; (f) depositing a metal layer; (g) heating the structure (120); and (h) depositing metal (112).    USE - The method is useful for producing back contacts on silicon solar cells (100) and an interconnection between silicon solar cells (claimed).    ADVANTAGE - The invention provides an efficient method of simultaneously producing locally defined contacts on back contacted silicon solar cells and an interconnection between silicon solar cells located on a module superstrate.    DETAILED DESCRIPTION - A method for producing back contacts on silicon solar cells (100) and an interconnection between silicon solar cells (100) where the front surface has been fully treated and the back surface has been processed to the point where the solar cells (100) can be contacted on the back surface, comprises: (a) attaching the solar cells (100) onto a transparent superstrate (104), thus forming a structure (120); (b) depositing a passivating layer (113) onto the back surface of the structure (120); (c) depositing a silicon material layer (108) onto the back surface of the structure (120); (d) separating the silicon material layer (108) by first areas (C); (e) providing contact sites in areas (B); (f) depositing a metal layer (109) onto the back surface of the structure (120); (g) heating the structure (120) to form suicide (110); and (h) depositing metal (112) onto the suicide (110). An INDEPENDENT CLAIM is a device comprising back contacts and interconnections, where the back contacts and interconnections are provided by the method above.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a back contacting and interconnecting of two solar cells.    Silicon solar cells (100)    N-type conductivity (101)    P-type conductivity (102)    Surface region (103)    Transparent superstrate (104)    Attachment layer (105)    Bottom layer (106)    Amorphous silicon nitride layer (107)    Silicon material layer (108)    Passivating layer (113)    Structure (120)