阅读说明：本技术 全自动深腔球引线键合头装置 (Full-automatic deep cavity ball lead bonding head device ) 是由 陈文� 牛伟光 潘兵 于 2019-08-19 设计创作，主要内容包括：本发明涉及一种全自动深腔球引线键合头装置,包括Z轴基座、Z轴滑台、打火机构、键合机构,键合机构设于Z轴滑台上,Z轴滑台与Z轴基座沿Z轴滑移连接。打火机构包括打火杆滑块、打火杆、压簧,打火杆滑块置于Z轴滑台一侧且与Z轴基座沿Z轴滑移连接,压簧连接在Z轴滑台上端与打火杆滑块上端间,打火杆连接在打火杆滑块下端；Z轴滑台靠下端处设有驱动触点,打火杆滑块上设有从动触点,从动触点与驱动触点上下抵压接触而使打火机构与Z轴滑台同步运动；Z轴基座上还设有限位块,限位块阻挡住打火杆滑块下移,驱动触点与从动触点脱离而使打火机构静止。本结构的打火机构可随劈刀同步大范围移动,又可静止打火,不阻碍键合运动,打火更快速可靠。(The invention relates to a full-automatic deep cavity ball lead bonding head device which comprises a Z-axis base, a Z-axis sliding table, a striking mechanism and a bonding mechanism, wherein the bonding mechanism is arranged on the Z-axis sliding table, and the Z-axis sliding table is connected with the Z-axis base in a sliding mode along a Z axis. The ignition mechanism comprises an ignition rod sliding block, an ignition rod and a pressure spring, the ignition rod sliding block is arranged on one side of the Z-axis sliding table and is connected with the Z-axis base in a sliding mode along the Z axis, the pressure spring is connected between the upper end of the Z-axis sliding table and the upper end of the ignition rod sliding block, and the ignition rod is connected to the lower end of the ignition rod sliding block; a driving contact is arranged at the lower end of the Z-axis sliding table, a driven contact is arranged on the ignition rod sliding block, and the driven contact is in up-and-down abutting contact with the driving contact to enable the ignition mechanism and the Z-axis sliding table to move synchronously; and a limiting block is further arranged on the Z-axis base and blocks the ignition rod sliding block from moving downwards, and the driving contact is separated from the driven contact to enable the ignition mechanism to be static. The striking mechanism of the structure can synchronously move in a large range along with the riving knife, and can strike fire statically without hindering the bonding movement, so that the striking is quicker and more reliable.)

1. The utility model provides a full-automatic dark chamber ball lead bonding head device, includes Z axle base, Z axle slip table, mechanism, the bonding mechanism of striking sparks, and the bonding mechanism is fixed on Z axle slip table, and Z axle slip table slides along the Z axle with Z axle base and is connected its characterized in that:

the ignition mechanism comprises an ignition rod sliding block, an ignition rod and a pressure spring; the ignition rod sliding block is arranged on one side of the Z-axis sliding table and is connected with the Z-axis base in a sliding mode along the Z axis, the pressure spring is connected between the upper end of the Z-axis sliding table and the upper end of the ignition rod sliding block, and the ignition rod is connected to the lower end of the ignition rod sliding block; a driving contact is arranged at the position, close to the lower end, of the Z-axis sliding table, a driven contact is correspondingly arranged on the ignition rod sliding block, and the driven contact is in up-down abutting contact with the driving contact so that the ignition mechanism and the Z-axis sliding table move synchronously; and the Z-axis base is also provided with a limiting block, the limiting block blocks the ignition rod sliding block from moving downwards, and the driving contact is separated from the driven contact to keep the ignition mechanism static.

2. The fully automatic deep cavity ball wire bond head assembly of claim 1 wherein: the lower end of the fire striking rod sliding block is provided with a rotating mechanism, and the output end of the rotating mechanism is connected with the fire striking rod and drives the fire striking rod to rotate around the Z axis.

3. The fully automatic deep cavity ball wire bond head assembly of claim 2 wherein: the rotation mechanism includes a rotating solenoid or a first voice coil motor or a pneumatic element.

4. A fully automatic deep cavity ball wire bond head apparatus as claimed in claim 1, 2 or 3 wherein: the limiting blocks are connected on the Z-axis base in a vertically adjustable mode.

5. A fully automatic deep cavity ball wire bond head apparatus as claimed in claim 1, 2 or 3 wherein: the linkage mechanism comprises a riving knife, an energy converter, a second voice coil motor and a parallelogram mechanism, wherein the parallelogram mechanism is connected to the Z-axis sliding table, the energy converter is arranged at the front end of the parallelogram mechanism and is connected with the riving knife, and the second voice coil motor is fixed to the Z-axis sliding table and is connected with the energy converter to adjust the bonding force.

6. A fully automatic deep cavity ball wire bond head apparatus as claimed in claim 1, 2 or 3 wherein: and a Z-axis linear motor for driving the Z-axis sliding table to slide is arranged between the Z-axis base and the Z-axis sliding table.

7. A fully automatic deep cavity ball wire bond head apparatus as claimed in claim 1, 2 or 3 wherein: and a first guide rail extending along the Z axis is arranged between the Z axis base and the Z axis sliding table and is matched with the Z axis sliding table in a sliding manner through the first guide rail.

8. A fully automatic deep cavity ball wire bond head apparatus as claimed in claim 1, 2 or 3 wherein: and a second guide rail extending along the Z axis is arranged between the Z axis base and the striking rod sliding block and is matched with the striking rod sliding block in a sliding manner through the second guide rail.

9. A fully automatic deep cavity ball wire bond head apparatus as claimed in claim 1, 2 or 3 wherein: and a measuring scale assembly used for measuring the movement distance of the Z-axis sliding table along the Z axis is arranged between the Z-axis base and the Z-axis sliding table.

10. The fully automatic deep cavity ball wire bond head assembly of claim 5 wherein: and a measuring scale assembly for measuring the movement distance of the parallelogram mechanism along the Z axis is also arranged on the parallelogram mechanism.

Technical Field

The invention relates to the technical field of bonding equipment, in particular to a full-automatic deep cavity ball lead bonding head device.

Background

A fully automatic deep cavity ball wire bonder is a device that electrically connects a metal wire to a semiconductor chip and a pin using ultrasonic waves, pressure and temperature. The first welding point is spherical, and high voltage applied to the striking rod is utilized to break through air, so that a current loop is formed between the high voltage and a metal wire on a nearby riving knife tip, and the metal wire is locally melted into a sphere. The ball-bonded solder joint is more robust and is typically used on the pad, or first solder joint, of the chip. As air needs to be punctured to form a current loop, the head of the striking rod is required to be far away from the chopper point, and the striking rod needs to be close to the chopper point during working. This places two demands on the firing mechanism of a fully automatic deep cavity ball wire bonder. Firstly, the riving knife can be bonded at different heights within a certain range, so that the striking rod and the riving knife are required to move in the Z direction within a large range to realize the striking function. Second, the key system may not impede the up and down movement of the bond head. Fast, high reliability is a fundamental requirement of the ignition system. To meet this feature, the present invention was made.

Disclosure of Invention

The invention aims to solve the technical problem and provides a full-automatic deep cavity ball lead bonding head device, which can ensure that a striking mechanism moves synchronously with a riving knife in a large range, can realize static striking without obstructing bonding movement, and is quicker and more reliable in striking.

The technical scheme of the invention is as follows: the utility model provides a full-automatic dark chamber ball lead bonding head device, includes Z axle base, Z axle slip table, mechanism, the bonding mechanism of striking sparks, and the bonding mechanism is fixed on Z axle slip table, and Z axle slip table slides along the Z axle with Z axle base and is connected its characterized in that:

the ignition mechanism comprises an ignition rod sliding block, an ignition rod and a pressure spring; the ignition rod sliding block is arranged on one side of the Z-axis sliding table and is connected with the Z-axis base in a sliding mode along the Z axis, the pressure spring is connected between the upper end of the Z-axis sliding table and the upper end of the ignition rod sliding block, and the ignition rod is connected to the lower end of the ignition rod sliding block; a driving contact is arranged at the position, close to the lower end, of the Z-axis sliding table, a driven contact is correspondingly arranged on the ignition rod sliding block, and the driven contact is in up-down abutting contact with the driving contact so that the ignition mechanism and the Z-axis sliding table move synchronously; and the Z-axis base is also provided with a limiting block, the limiting block blocks the ignition rod sliding block from moving downwards, and the driving contact is separated from the driven contact to keep the ignition mechanism static.

By means of the structure, when the ignition rod sliding block moves in a large range, the driven contact is always pressed on the driving contact by the action of the spring, so that the ignition rod sliding block moves up and down along with the Z-axis sliding table and the bonding mechanism, and the ignition rod sliding block is in a large-distance synchronous movement state. When the Z-axis sliding table and the bonding mechanism descend to a certain position, the ignition rod sliding block is in contact with the limiting block, the ignition rod mechanism is limited to continue to move downwards, the Z-axis sliding table and the bonding mechanism continue to move downwards to perform bonding of devices, and at the moment, the static ignition state is achieved.

Further, in the full-automatic deep cavity ball lead bonding head device, the lower end of the sparking rod sliding block is provided with a rotating mechanism, and the output end of the rotating mechanism is connected with the sparking rod and drives the sparking rod to rotate around the Z axis. As the functional expansion, the rotary mechanism is connected with the striking rod, so that the rotary mechanism can rotate to the position right below the tip of the cleaver when striking sparks, and the striking quality and reliability are improved.

Further, in the fully automatic deep cavity ball wire bonding head device of the present invention, the rotating mechanism includes a rotating solenoid or a first voice coil motor or a pneumatic element.

Further, in the full-automatic deep cavity ball wire bonding head device of the present invention, the limiting block is connected to the Z-axis base in a vertically adjustable manner.

Further, in the full-automatic deep cavity ball lead bonding head device, the bonding mechanism comprises a riving knife, an energy converter, a second voice coil motor and a parallelogram mechanism, wherein the parallelogram mechanism is connected to the Z-axis sliding table, the energy converter is arranged at the front end of the parallelogram mechanism and connected with the riving knife, and the second voice coil motor is fixed on the Z-axis sliding table and connected with the energy converter to adjust the bonding force. Thereby, the transducer is able to perform a small amount of Z-direction slip.

Further, in the full-automatic deep cavity ball lead bonding head device, a Z-axis linear motor for driving the Z-axis sliding table to slide is arranged between the Z-axis base and the Z-axis sliding table.

Furthermore, in the full-automatic deep cavity ball lead bonding head device, a first guide rail extending along the Z axis is arranged between the Z axis base and the Z axis sliding table and is matched with the Z axis sliding table in a sliding manner through the first guide rail.

Furthermore, in the full-automatic deep cavity ball lead bonding head device, a second guide rail extending along the Z axis is arranged between the Z axis base and the striking rod sliding block and is matched with the striking rod sliding block in a sliding mode through the second guide rail.

Furthermore, in the full-automatic deep cavity ball lead bonding head device, a measuring scale assembly for measuring the movement distance of the Z-axis sliding table along the Z axis is arranged between the Z-axis base and the Z-axis sliding table, so that the sliding distance can be controlled accurately.

Furthermore, in the full-automatic deep cavity ball lead bonding head device, a measuring scale assembly for measuring the movement distance of the parallelogram mechanism along the Z axis is further arranged on the parallelogram mechanism, so that the sliding distance of the parallelogram mechanism can be fed back accurately.

The invention has the beneficial effects that:

1. the invention has simple structure and reasonable design, has the dual functions of static striking and synchronous displacement, can meet the aim that the striking mechanism moves along with the cleaver in a large range of Z axis synchronously, can not obstruct the up-and-down bonding movement of the bonding mechanism, and can strike fire more quickly and reliably.

2. The rotary mechanism can be additionally arranged to realize the rotary positioning of the sparking rod, so that the sparking rod is aligned to the position right below the tip end of the cleaver to strike sparks, the sparking quality and reliability are obviously improved, the rotary reset can be realized after the sparking is finished, and the descending bonding of the bonding mechanism is not influenced.

3. The position of the limiting block can be adjusted up and down, and the optimal ignition efficiency and the optimal clearance avoiding device can be ensured.

Drawings

Fig. 1 is a schematic structural view of the driven state of embodiment 1.

Fig. 2 is a schematic structural view of embodiment 1 in a state of striking a fire.

FIG. 3 is a schematic view of the structure of the case of the embodiment 2 in a struck state.

Detailed Description

The invention will now be further described with reference to the accompanying drawings in which: