Patent ID: 9339888
Filing Date: 2016-05-17
CPC Classification: B23K,H01L

Claim Text:
1. A bonding apparatus comprising: a bonding arm having a receiving portion extending in a direction intersecting a center axis of a bonding tool and facing the center axis of the bonding tool; a pair of laminated piezoelectric elements arranged symmetrically with respect to the center axis of the bonding tool and configured to generate an ultrasonic vibration; a generator configured to drive the laminated piezoelectric elements; a pair of capillary holding portions configured to hold the bonding tool with surfaces which come into contact with the bonding tool being curved inward and to transfer the vibration of the laminated piezoelectric elements to the bonding tool with other surfaces in contact with vibration surfaces of the laminated piezoelectric elements; and a pressurizing device including a movable portion having a trapezoidal column shape, a pair of tapered portions located on respective opposite sides of the movable portion, and a bolt integrated into the movable portion, the movable portion being in tight contact with the pair of tapered portions at an inclined surface of an outer periphery of each of the pair of tapered portions, wherein the bonding arm is configured to hold the capillary holding portions and the bonding tool by moving one of the pair of tapered portions of the pressurizing device in a state in which the laminated piezoelectric elements, the capillary holding portions, and the bonding tool are positioned between the receiving portion of the bonding arm and the one of the pair of tapered portions.