chip pickup head

Abstract

The invention provides a chip pick-up head, comprising a base, a vacuum suction head pierced in the base, a lifting drive device and a rotary drive device, the vacuum suction head includes an air guide rod, and a suction nozzle connected to the bottom of the air guide rod 1. The air suction device connected to the top of the air guide rod. The lifting drive device includes a cylinder. Drive the air guiding rod to rotate and then drive the suction nozzle to rotate. The present invention realizes the control of the pressure of the suction nozzle by controlling the air pressure of the cylinder. Compared with the control of the pressure of the suction nozzle by the motor, the precision is higher, the error is lower, and the pressure of the suction nozzle can be better controlled, avoiding damage the chip. The rotary driving device drives the suction nozzle to rotate, which can realize the control of the rotation angle of the chip, so that the chip can be better aligned with the pad on the circuit board, and the product quality can be improved.

Description

Technical field [0001] The present invention relates to the field of chip manufacturing, in particular to a chip pick-up head. Background [0002] A chip pick-up head is a precision instrument used to transfer chips to pick chips from the strip and attach the chips to a circuit board. When the pick-up head attaches the chip to the circuit board, there will be a downward pressure force, because the chip is more fragile and easy to damage, so the chip pick-up head is required to have precise control over the downward pressure force. Most of the existing chip pick-up heads are controlled by the motor, and the downforce control is achieved by controlling the motor current, but because the motor is a non-linear component, and the current fluctuations when the motor is working are also more serious, the error of this control method is large, and it is difficult to accurately control the downforce of the pick-up head. In addition, the chip process also requires the chip to be completely...

AI Technical Summary

Problems solved by technology

Most of the existing chip pick-up heads control the downforce by means of a motor, and realize the downforce control by controlling the motor current. However, since the motor is a nonlinear component, and the current fluctuation of the motor is relatively serious when the motor is working, this control The error of the method is relatively large, and it is difficult to accurately control the downforce of the pickup head

In addition, the SMT process also requires the chip to be completely aligned with the pad of the circuit board, but the existing technology can only control the relative position of the chip and the pad, but cannot control the rotation angle of the chip, which will easily cause the chip to be placed crookedly, affecting the appearance, and even May cause false welding, resulting in product quality problems

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