A disposable absorbent article adapted to form a tridimensional shape before use with a generally upwardly convex rear region, having a body facing surface and a garment facing surface, a longitudinal symmetry plane, a front end edge and a rear end edge, and comprising a liquid pervious topsheet, a backsheet joined to said topsheet and an absorbent core intermediate the backsheet and the topsheet. The method further comprises using pitch multiplication to produce at least two features in a lower masking layer for each feature in the photoresist layer. The electrode may be at least partly inserted into the patient’s skin, such as by inserting at least part of one or more teeth underneath the skin.