Polycrystalline diamond cutting element

A method for manufacturing a polycrystalline diamond cutting element for a drill bit of a downhole tool, comprising:

• leaching a plurality of stress engineered polycrystalline diamond shapes;
• sintering a first polycrystalline diamond material in a first high temperature-high pressure pressing operation having a temperature higher than 1300° C. and a pressure greater than 65 KBar to form a first sintered polycrystalline diamond material and forming the first sintered polycrystalline diamond material into a plurality of particles with an average diameter of 0.5 microns;
• removing substantially all catalyzing and other metallic materials from the first sintered polycrystalline diamond material;
• subsequent to the leaching of the plurality of stress engineered shapes, intermixing the sintered first polycrystalline diamond material with the plurality of stress engineered shapes to form a diamond table;
• positioning the diamond table on a substrate;
• bonding the diamond table onto the substrate by a second high-temperature-high pressure pressing operation having a temperature higher than 1300° C. and a pressure greater than 65 KBar such that the at least a portion of the leached polycrystalline diamond particles are positioned along at least one working surface of the diamond table;
• and
• subsequent the bonding, treating all or a portion of the at least one working surface in a leaching process to remove all or select portions of any catalyst that may have infiltrated during the bonding of the diamond table onto the substrate.