Shenzhen Crescent Optoelectronic Co., Ltd.
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
  • 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
  • Overview Of SMD LED Suppliers Of Taiwan And Mainland

    Overview Of SMD LED Suppliers Of Taiwan And Mainland

    March 13, 2019Compared with other types of LED devices, SMD products have the advantages of high light efficiency, low cost and fast production speed. SMD products are driven by low current, and the light efficienc...view
  • Characteristics of 3528 Patch LED Beads

    Characteristics of 3528 Patch LED Beads

    June 27, 2019At present, patch LED beads are the most widely used LED light-emitting diodes in the market. The quality of patch-type LED beads on the market is uneven, mainly due to the different materials in the ...view
  • The Future of Dob Module Is Probably Coming.

    The Future of Dob Module Is Probably Coming.

    April 24, 2019DOB LED module is about to have strong market demand. DOB modules are popular among end users and many LED manufacturers due to their simple structure, convenient production and low cost. We have seen...view