Damm bar processing device and Damm bar processing method

摘要

The arrangement of the lead (3) is detected by the photoelectric detector (41), and the signal is processed by signal processing to determine the timing of the pulse laser light oscillation, and the laser optical axis (13C) is relatively relative to the speed (V0) by the machining table (21) while oscillating the pulsed laser light Disconnect the Damm bar (5) while moving. At this time, the longitudinal dimension of the spot (13b) of the pulsed laser beam (13a) is set to be two times or more of the width of the Damm bar (5) by the beam longitudinal direction converter (11a), and the width direction of the spot (13b) by the beam width direction converter (11b) is 1 / 2 or more of the length of the Damm bar (5) and 4 / 5 In the following manner, the beam rotator 11C is appropriately operated so that the longitudinal direction of the spot (13b) is substantially coincident with the longitudinal direction of the lead (3), and the spot (13b) passes over the width (W1) of the Damm bar (5). In this way, the shape after the cutting of the Damm bar (5) is made into a high precision and a good shape.