schematic figure is shown by the dotted rectangle at the bottom of the figure a finger outline roughly to scale is also shown the general ito electrode pattern is evident that covers the main part of the substrate 40 the pattern in this example covers a rectangular area which matches the area of the touch screen or other device which it is to form the sensing part the previously described four overlap regions i iv of the x electrodes are also marked the substrate 40 which is generally rectangular also has a neck tab 42 mid way up the left side of the substrate the neck tab 42 is used for external contacting as described with reference to a subsequent figure on the left hand side of the substrate 40 the side adjacent the neck tab 42 it will be seen that there are seven groups of conducting tracks 50 62 forming external lines y 1 y 7 for the y electrodes with lines y 2 y 7 each being connected to three y electrodes via the tracks 52 62 and y 1 connecting four y electrodes via track 50 there being 22 y electrodes in total on this left half of the device i e the half to the left of the central spine 26 on the right hand side there is an exactly corresponding arrangement with 22 y electrodes ganged in three 39 s apart from at the bottom where four are ganged together the tracks 50 62 of the external lines y 1 y 7 on the right hand side.