from the diamond particles because of their superior thermal stability these non metallic catalytic materials are incorporated into the diamond layer 103 of the compact 101 of this invention the non metallic catalytic materials provide for the growth of sintered diamond bonds between the diamond grains of the polycrystalline diamond of layer 103 and also form a strong bond with diamond layer 102 by incorporating one or more of these non metallic catalyzing materials in to the working surface 104 region which includes both the top and sidewalls of the second polycrystalline layer 103 the resulting pdc compact can provide a more thermally stable cutting edge in use in high temperature contact with a rock or otherwise formation the diamond particles of the second diamond layer 103 remain integrally bonded with the diamond particles of the first diamond layer 102 which in turn remains strongly bonded to the substrate via the metallic catalyst in the first diamond layer 102 fig2 shows the present mode of making or manufacturing the pdc of this invention the working surface polycrystalline diamond material is loaded 201 typically in a can device arrangement for ht hp processing the remote working surface polycrystalline diamond material is loaded 202 also typically in the can device arrangement for ht hp processing in some alternative embodiments the material for both polycrystalline diamond layers 102 103 may be loaded together while in other embodiments because of the different characteristics of the desired catalysts they may be loaded in separate steps and may be separated in different can components the substrate material typically tungsten carbide wc is loaded 203 also typically in the can device arrangement the can device is completed 204 typically by assembling the.