Patent ID: 8800692

Claim:
A cutting element for use in earth-boring tools, comprising: a cutting element substrate; a first layer of polycrystalline diamond material over a surface of the cutting element substrate, the first layer of diamond material exhibiting a first wear resistance; a second layer of polycrystalline diamond material on a side of the first layer of polycrystalline diamond material opposite the cutting element substrate, the second layer of polycrystalline diamond material comprising about eighty-eight volume percent (88 vol %) diamond or more, the second layer of polycrystalline diamond material comprising interbonded grains of diamond material, wherein all of the interbonded grains of diamond material of the second layer of polycrystalline diamond material have an average grain size of about fifteen (15) microns or less, the second layer of polycrystalline diamond material exhibiting a second wear resistance greater than the first wear resistance; a leading chamfer formed proximate an edge of the cutting element between a front surface of the cutting element and a lateral surface of the cutting element; and a break-in chamfer, a landing chamfer, and a trailing chamfer, wherein the break-in chamfer extends through only the second layer of polycrystalline diamond material, the landing chamfer extends through at least a portion of the second layer of polycrystalline diamond material and at least a portion of the first layer of polycrystalline diamond material, and the trailing chamfer extends through at least a portion of the first layer of polycrystalline diamond and at least a portion of the cutting element substrate.