single material region 615 slotless region is in the periphery of the conductor insulator composite layer 610 and around the composite region 619 the single material region 615 comprises a planar surface the surface of the subsequently formed metal layer 640 above the single material region 615 may also be planar thereby providing effective contrast between the metal layer 640 and the neighboring passivation layer 660 when processing the wire bonding step as disclosed in fig4 c a cross section of layout 70 a along the line dd is similar to that shown in fig4 a in the opening 652 in fig5 b a top view of the layout 70 b designed for the conductor insulator composite layer 610 in opening 652 in fig4 a is shown in the layout 70 b the distribution of the slots 614 comprising the copper layer 612 therein form a diamond shaped composite region 619 slotted region at the center of the conductor insulator composite layer 610 the single material region 615 slotless region is in the periphery of the conductor insulator composite layer 610 and around the composite region 619 the single material region 615 comprises a planar surface the surface of the subsequently formed metal layer 640 above the single material region 615 may also be planar thereby providing effective contrast between the metal layer 640 and the neighboring passivation layer 660 when processing the wire bonding step as disclosed in fig4 c a cross section of the layout 70 b along the line ee is similar to that shown in fig4 a in the opening 652 while the invention has been described by way.