Abstract: An interconnector for solar cell strings intended to form a photovoltaic module, the interconnector comprising at least one cell interconnecting strip extending beyond a cell located at the end of the string through an end, and at least one string interconnecting strip, a section of one from among the cell interconnecting strip and the string interconnecting strip has a substantially constant surface, and a variable shape between a first zone of a first thickness and a second zone of a second thickness, the second thickness being strictly less than the first thickness and the second thickness being strictly less than 50 ?m. Each second zone thus constitutes a resistance welding zone without loss in terms of conduction. Without extra thickness at the interconnections, the risk of the module breaking is limited.