Circuit World - Emerald - Quarterly - Vol. 43, No. 3, 2017 The purposes of this paper are to study the characterization of drill bit breakage in printed circuit board (PCB) drilling process based on high-speed video analysis and to provide an important reference for micro drill bit breakage prediction ISSN: 0305-6120 Subjects--Topical Terms: LC Class. No.: https://www.emerald.com/insight/publication/issn/0305-6120/vol/43/iss/3