How to control and solve the wafer crack in the LED solid crystal process?

First, the chip material itself is broken

If the chip breakage is greater than 1/5 of the width of the single-sided chip or the break is at an oblique angle, each side is longer than 2/5 chips or damaged to the aluminum pad. Such chips are unacceptable (this is an item in the chip inspection standard) . The main causes of the bad phenomenon are:

1. The chip manufacturer is not working properly

2. Chip incoming inspection has not been sampled

3. Not picked out during online operation


1. Inform the chip manufacturer to improve

2 Strengthen the feed inspection, and reject the chip with too much damage.

3. When the Q test is performed online, the broken chip should be picked out and the good chip should be added.

Second, the LED solid crystal machine is used improperly

1. Improper suction parameters of the machine

The nozzle height and the solid crystal height of the machine are directly controlled by the parameters in the machine computer. The parameters are large, the suction height is small; the parameters are small, the suction height is large, and the chip is damaged or not, which is directly affected by the suction height parameter of the machine. The main reasons for the bad phenomenon are: large parameters of the machine, low hunting height, excessive force on the chip, resulting in chip damage.


Adjust the parameters of the machine, and appropriately increase the height of the nozzle or the height of the solid crystal. Adjust the height of the nozzle in the first “Pick Level” in the “Bond head menu” in the “SETUP” mode of the machine, and then in the second item. Bond Level" adjusts the solid crystal height.

2, the size of the nozzle does not match

Chips of different sizes must be fixed with different nozzles. Large chips can be easily leaked with small nozzles and chips. Small chips can be easily broken with large nozzles and chips. Therefore, the selection of appropriate nozzles is a prerequisite for solid chips. The cause of the bad phenomenon is that the nozzle is too big to break the chip.

Solution: Choose the appropriate porcelain nozzle.

Third, artificial rupture caused by improper operation

A, improper homework

Failure to follow the instructions, so that the chip is broken. The main causes of the bad phenomenon are:

1. The material is not taken well and dropped to the ground.

2. I encountered the chip when I entered the oven.

Solution: When taking the material, keep your hands steady. When entering the oven, the material should be flat and gently put in. Do not tilt or use excessive force.

B, heavy object crush

The chip was broken due to excessive external force. The main reasons for this kind of bad phenomenon are:

1. The microscope falls onto the material, breaking the chip

2. The machine parts are dropped onto the material.

3. Iron plate pressed to the material


1. The microscope screw should be locked

2. Regularly check the machine parts for looseness.

3. There must be no objects such as iron plates on the material.

Product parameters

Description: Smart RGBW GU10 Spotlight
Material: Die-cast aluminum
Product dimension: 50mm*62mm
Protocol: Bluetooth Mesh 4.1
Color: RGB+W
Color Temperature: 3500K
Beam angle: 35°
LED Power: 5W
Luminour Flux: 300LM


Smart GU10 spot light with both warm light and RGB colorful light, it can meet the daily lighting and ambient lighting, high efficiency and energy saving, light source is stable and without strobe. The color, brightness and RGB lighting auto-cycle mode can be controlled on the App.

Spot Light 2

The App are developed on the most advanced Bluetooth Mesh technology. [LinkupHome" App can be downloaded in the App store or Google Player, then you can control our product without any complicated steps. The App is stable, easy control and multifunctional.

3   5

The advantages of Bluetooth Mesh are fast connect, low power consumption, no password required and Ad-Hoc Network. No need WIFI and hubs, as long as you have a Bluetooth-enabled smart phone, you can experience the smart light. When you install several smart GU10 spot lights, the self-organizing network function can make the signals free connect, break the limitation of distance. 

Blutooth Mesh

Smart RGBW Spotlight

Smart RGBW Spotlight, RGBW LED Spotlight, Smart Garden Spot Light, Garden Spot Lights Solar Powered

Ningbo Homey Photoelectric Technology. Co., Ltd ,