Patent ID: 6467158
Filing Date: 2002-10-22
Classification: H05K,Y10S,Y10T

Abstract:
In a chip bonding system in which a component feeder picks up quadrangular-shaped IC chips arranged in a row from above with a suction nozzle equipped with a quadrangular-shaped suction surface and turns over the suction nozzle upwards by a 180-degree rotation so as to feed each IC chip of which their chip's face has been thereby turned over, the improvement comprising;a bonding head for picking and mounting IC chips onto a circuit substrate; a turning mechanism supported on a movable table comprising a turning body equipped with a suction nozzle at a distal end thereof and turnable around a horizontal axis, whereby the suction nozzle can be faced both upwards and downwards; a rotary mechanism operably connected to the suction nozzle for causing the suction nozzle to rotate around an axis line thereof; a detector which detects an amount of displacement of the IC chip in a rotating direction around the axis line of the suction nozzle which is going to pick up the IC chip before the suction nozzle picks up the IC chip; and a controller for controlling the rotary mechanism to cause the suction nozzle to rotate at a necessary angle around the axis line thereof before picking up the IC chip according to said amount of displacement of the IC chip detected by the detector, wherein the rotary mechanism is housed within the turning body of the turning mechanism, and wherein the rotary mechanism includes a ball screw and nut assembly and a drive system for driving the ball screw and nut assembly to rotate the suction nozzle, wherein the drive system includes a motor, a cam member operatively connected to the motor and a cam follower connected to the ball screw and nut assembly whereby movement of the cam member drives the cam follower.