Shenzhen Crescent Optoelectronic Co., Ltd.
Exhibition
Are SMD LED Beads Environmentally Friendly?
At present, more and more surface mounting device led beads have replaced conservative lighting lamps, and are used in l...
What are the Differences between COB Package and SMD Package in the Field of LED Display?
The existence of double giants in the field of LED display has jointly developed and flourished the LED industry. As a c...

Production Process of LED Bead COB

The production of cob LED packaging has stringent environmental requirements. The workshop producing cob LED packaging needs to adopt fully enclosed temperature and humidity measures to meet the dust level of 100,000, which provides a good temperature and humidity environment for the production of SMD materials.

COB LED package process:

1. Crystallization expansion: First, the whole film of LED wafer is evenly expanded by special crystal expander, which is convenient for spinning.

2. Back glue: Put the expanded crystal ring on the back glue machine with scraped silver paste layer, and then put the silver paste on the back. Point silver paste is suitable for bulk LED chips.
Back glue: The expanded crystal ring is placed on the back glue machine surface of the scraped silver paste layer, and the silver paste is put on the back. A proper amount of silver paste is dotted on PCB printed circuit board by dispensing machine, and the expanded ring with silver paste is put into the spinning frame. The operator will use the spinning pen to spin the LED wafer on PCB printed circuit board under the microscope.

3. Adhesion chip, dispensing appropriate amount of dispensing on the IC position of PCB printed circuit board with dispensing machine, and then correctly placing IC bare film on the adhesive with anti-static equipment.

4. Drying: Put the sticky bare sheet in the heat circulation oven and put it on the large flat heating board for a period of time at constant temperature, or it can be cured naturally.

5. Wiring: Aluminum wire welding machine is used to bridge the wafer and the corresponding pad aluminum wire on PCB board, that is, the internal lead welding of COB.

6. Pre-test: Use special testing tools to detect COB boards, and repairs the unqualified boards.

7. Dispensing: The dispensing machine is used to place the dispensing AB glue on the bonded LED grains, and then package the appearance according to the customer's requirements.

8. Curing: PCB printed circuit boards sealed with glue are placed in the heat cycle oven at constant temperature and can be set different drying time according to the requirements.

9. Post-test: The encapsulated PCB printed circuit boards are tested with special testing tools to distinguish the good from the bad.

Related News
  • Discussion on Four Categories of SMD LED Lamp Beads

    Discussion on Four Categories of SMD LED Lamp Beads

    June 27, 2019With the rapid development of LED display, there are many different types and sizes of led. SMD LED, LED beads and other products also occupy a place in the LED industry, especially the application of...view
  • DOB: De-power LED lighting

    DOB: De-power LED lighting

    March 13, 2019Everyone knows that driving power is the core of LED lighting. LED lighting lamps are known as energy-saving, intelligent and long service life. But these basically rely on good driving power. There h...view
  • Advantages of High Power LED With Warm White Color

    Advantages of High Power LED With Warm White Color

    March 13, 2019First of all, this kind of LED is environmentally friendly, which has no mercury, lead and other heavy metals polluting the environment. It will not produce ultraviolet light when luminescent. So this...view
  • Principle of LED Packaging Design Technology

    Principle of LED Packaging Design Technology

    January 15, 2019Due to the complex structure and process of high power LED package, it directly affects the service performance and life of LED. The high power white LED package is an especially hot research topic.Th...view