A wire bonding machine and its head structure

Abstract

The invention provides a wire welding machine and its bonded head structure, wherein the bonded head structure includes a voice coil motor, a bonded head body, a transducer and a chopper; one end of the bonded head body is mechanically connected to the voice coil motor, and the transducer It is installed on the other end of the main body of the state head, and the riving knife is installed on the front end of the transducer. The voice coil motor includes a mover and two stators connected with the mover; the mover is mechanically connected with the main body of the state head, and the mover is sandwiched between the two stators. The mover is provided with a coil, and each stator is provided with a magnet with a trapezoidal cross-section, and two magnets are arranged close to the coil, sandwiching the coil. The wire welding machine and its head structure of the present invention improve the stability of the force constant in the welding area, making it stable in the pressure output in the important working range, thereby improving the stability of the chopper at different heights during work, and improving the stability of the welding wire. quality.

Description

technical field [0001] The invention relates to the technical field of welding equipment, in particular to a wire welding machine and its head structure. Background technique [0002] The wire bonding machine is one of the core processes in the back-end process of semiconductor packaging, and the bond head is the most important part of the wire bonding machine, and it is the direct component for gold wire bonding. In the whole process of wire bonding, the first welding and the second welding are important process stages, which determine the quality of the connection with the chip or lead frame. The pressure during welding directly affects the shape of the solder ball, the formation of extruded aluminum and alloys, and the pressure during welding is directly given by the voice coil motor of Bangtou. [0003] Please refer to figure 1 with figure 2 However, due to the weak effective magnetic field area of ​​the existing voice coil motor of the Bangtou, and the magnetic fiel...

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Problems solved by technology

[0003] Please refer to figure 1 and figure 2 However, due to the weak effective magnetic field area of ​​the existing Bangtou voice coil motor, and the magnetic field strength has a peak area, the force constant stability of the Bangtou in the welding (bonding) area is poor, making it in The pressure output in the important working range is unstable, which will eventually affect the quality of the welding wire

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