Patent ID: 8807026

Claim:
Method for printing on a wafer for a photovoltaic cell by screen-printing electrical conductors, wherein the method comprises: producing at least two first test-patterns for a first conductive layer on the surface of the wafer; printing at least four second test-patterns for a second conductive layer, distinct from the at least two first test-patterns, during printing on the surface of the wafer by screen-printing with screen-printing screen; measuring the actual distance obtained on the surface of the wafer between the first test-patterns and the second test-patterns; comparing this actual distance with a theoretical distance in order to deduce therefrom an offset of the screen-printing screen of the printing caused by a deformation of the screen-printing screen, wherein the theoretical distance is a distance defined by a alignment of the screen printing without deformation of screen-printing screen, wherein the offset determined by the comparison is used to correct a misalignment caused by the deformation of the screen-printing screen.