generally several times thicker than the films 14 and 16 one result of this difference in thickness is that a relatively deep cavity 20 see fig1 is created between the two dielectric films 18 and 19 where the film portion 16a is exposed additionally because of the slopes of edges 21 and 23 of the conductive film 16 and the dielectric layer 18 respectively there is present a v shaped trough 25 between two layers 16 and 18 the significance of the relatively deep cavity 20 and the v shaped trough 25 is described shortly hereinafter to the point so far described the device 10 is well known using known materials and known fabrication techniques also at this stage of processing the conductive films 14 and 16 have been fired and are firmly sintered in place the purpose of the dielectric layer 18 is to allow a crossing of the conductive path 16 over the conductive strip 14 without electrical contact therebetween this is illustrated in fig2 which shows the presence of an additional thick film conductor 22 which overlaps and is electrically connected to the strip portion 16a the strip 22 is primarily of silver i e the aforementioned prior known silver based composition and is used as an extension of the strip 16 for purposes of cost savings and low electrical resistivity as shown the strip 22 extends from its area of contact with the strip 16 into and across the v shaped trough 25 and then climbs over and across the dielectric layer 18 as previously noted the situation shown in fig2.