Drill-bit with polycrystalline diamond cutter construction

Polycrystalline diamond cutter body 41 includes a first region 80 that is remote from the surfaces 82, 83, which includes an infiltrant material within the interstitial regions of the diamond body 41, and a second region 81 that is substantially free of the infiltrant material within the interstitial regions. The second region 81 extends a depth from surfaces 82 and 83 of the diamond body 41. In this particular embodiment, the surfaces include a top surface 82 and side surfaces 83 of the diamond body 41. The depth of the first region can be the same or different for the surfaces 82 and 83 depending on the particular properties desired for the cutter element. Additionally, the extent of the side surfaces that include the second region can vary from extending along the entire side of the diamond Body to extending only along a partial length of the side of the diamond body.