A method for producing a stack, includes the following steps: forming a first layer able to conduct electricity, forming a layer of interest on the first layer, the layer of interest comprising at least one free volume, forming at least one repairing element, each repairing element at least partially filling a free volume, called the free volume of interest, the repairing element comprising at least one insulating layer and leaving free an upper surface of the layer of interest opposite the first layer located outside of the at least one free volume, forming a second layer, able to conduct electricity, on the layer of interest, the second layer covering the repairing element and the free surface, the step of forming the repairing element comprising the following steps: forming, on the layer of interest, a layer that extends at least partially into the free volume of interest, covering at least one portion of the buffer layer located in the volume of interest with a filling layer, the buffer layer and the filling layer being made from different materials.