Patent ID: 7946363

Claim:
A cutting element comprising: a substrate comprising an end surface and a cylindrical periphery, wherein the end surface extends to the periphery; and a thermally stable polycrystalline (TSP) material layer extending into the substrate below the end surface, wherein said TSP material layer is a polycrystalline diamond layer selected from the group of polycrystalline diamond layers consisting essentially of polycrystalline diamond layers having at least some of a cobalt in such polycrystalline diamond layers leached and polycrystalline diamond layers formed with a thermally compatible silicone carbide binder, wherein the TSP material layer comprises an exposed portion not extending into the substrate, said exposed portion spanning around only a portion of the substrate periphery, wherein said end surface intersects said periphery at a level, wherein said TSP material layer excluding said exposed portion extends entirely below said level.