LED chips are diodes that have a PN junction and allow electrical current to flow only from the positive electrode to the negative electrode. LED chips are assembled on PCBs in these two ways from PCBONLINE:
● Chip-on-board (COB) LED: LED chips are bonded on PCBs. PCBONLINE grapes two COB LED technologies.
One is LED wire bonding - we use gold wires to connect LED chips to the PCB then use glue to seal the LED chips.
The other is flip-chip bonding - without gold or aluminum wires, we flip the LED chip and let the PN junction directly bond the positive and negative electrodes on the PCB. Then we use glue to seal the LED chips. Our LED flip-chip assembly machine is specifically used.
● LED surface mount (SMT) assembly: SMD LEDs are picked and placed on PCB pads and then reflow soldered.
PCBONLINE has mature LED assembly lines in our PCB assembly factory in Shenzhen. You can have COB and SMD LED PCBs manufactured and assembled at one stop by PCBONLINE.
Note: Driver-on-board (DOB) LED is not an LED assembly technology but an LED PCB design option. Without AC/DC, EMC circuit, DOB LED products adopt the linear IC drive solution on the PCB. If your design is DOB LED, we can also manufacture and assemble PCBs for you.