LED package Collection: LED packaging technology can not know the knowledge(I)
LED lighting packaging technology LED is a high-tech content, in this circle, there are many so-called trade secrets, because these things related to the survival of a business, so some things are not open to everyone, including some processes or Process. These things directly to determine whether the center of the competitiveness of enterprises, here today to publish the LED industry, packaging technology knowledge, hoping to give you help.
First, the production process
A) Cleaning: Use ultrasonic cleaning PCB or LED bracket, and drying.
B) Bracket: in the led die (large wafer) at the bottom of the electrode prepared after the expansion of silver plastic, the expansion of the die (large disc) placed in the thorn crystal stage, under the microscope with a thorn pen to die One by one mounted on the corresponding pad of the PCB or LED holder, followed by sintering to stabilize the silver paste.
C) Press welding: Connect the electrode to the LED die with an aluminum wire or a gold wire welder for current injection. LED installed directly on the PCB, the general use of aluminum wire welder. (The production of white light TOP-LED need gold wire welder)
D) Package: through the dispensing, with epoxy LED die and wire protection. Patching on the PCB board, the shape of the colloid after curing has strict requirements, which is directly related to the brightness of the finished backlight products. This process will also take on the task of phosphor (white LED).
E) Soldering: If the backlight is made of SMD-LED or other packaged LEDs, the LEDs need to be soldered to the PCB before assembling the process.
F) Film: punching die with a variety of necessary for the expansion of the film, reflective film and so on.
G) Assembly: According to the requirements of the drawings, the backlight of the various materials manually installed the correct location.
H) Test: check the backlight photoelectric parameters and light uniformity is good.
2, Packaging: the finished product as required packaging, storage.