the center of the device toward its outer edge covering the entire area of the conducting element 109 the conducting element 109 is connected to the return or neutral or ground terminal of the electrical unit the conducting element 109 may be attached or glued to the backing material 78 with a field of glue 121 the material 44 extend radially to the edge of the conducting element 109 another variation of non uniform application of the conductive dielectric intermediate layer 44 is illustrated in fig1 which is cross sectional view of a non segmented return electrode according to the principles of category 1 of this invention the intermediate layer 44 between the conducting element 109 and of the subject tissue 43 not shown is applied with a thickness increasing in steps toward the outer edge of the device covering part or all area of the conducting element 109 the field 44 can extend to or beyond the outermost radius of the conducting element 109 the conducting element 109 is connected to the return or neutral or ground terminal of the electrical unit the conducting element 109 may be attached or glued to the backing material 78 with a field of glue 121 yet another variation of non uniform application of the intermediate layer 44 is illustrated in fig1 which is cross sectional view of a non segmented return electrode according to the principles of category 1 of this invention the intermediate layer 44 between the conducting element 109 and of the subject tissue 43 not shown is applied with.