A cutter for a drill bit has a superabrasive member joined to a substrate at a three-dimensional interface. The three-dimensional interface comprises a protrusive pattern of interconnected elements comprising projections of the superabrasive member into the substrate and vice versa. The protrusive pattern...http://www.google.fr/patents/US6739417?utm_source=gb-gplus-shareBrevet US6739417 - Superabrasive cutters and drill bits so equipped
