SOLAR CELL WITH BACKSIDE CONTACTS and its manufacturing method

The solar cell (1) comprises with the fundamental doped and receiving light face (4) and back (6) silicon wafer (3), wherein provided with a interdigital of semiconductor pattern; the interdigital of semiconductor pattern with the first containing first diffusion region (9) and pattern comprises at least one and at least one second mixing area (10) and pattern; the second diffusion region (10) (9) which the first diffusion region and provided with a first mixing different second mixing, which (6) extended at the second diffusion region to a silicon wafer (3) at least one groove (12) from the baffle (10).