LED display manufacturers production production process

First, LED display chip: there is no mechanical damage on the surface of the material and pits (positive and negative electrode in accordance with the correct process)
Second, the LED display expansion: general after slicing is still tightly sorted (0.1mm), for the operation of the post-process is not convenient. Expansion of the chip film with a paragraph radical, able to stretch about can be stretched to 0.6mm, do not recommend manual expansion, because it is easy to cause unnecessary waste.
Third, LED dispensing: stent contact point on the silver or insulating adhesive (for GaAs, SiC conductive substrate, with the back electrode of the red, yellow, yellow-green chip, using silver. For sapphire insulating substrate blue, green LED chips, using insulating adhesive to fix the chip) the amount of dispensing glue is difficult to control, different positions and height are detailed process. Silver glue and insulating glue storage has a timeliness, wake up material, stirring, use long time.
Fourth, LED ready glue: the opposite of dispensing, ready glue coated on the back of the LED electrode, and then with silver glue installed on the teaching. Gum preparation efficiency is better than dispensing, but not all products are suitable for gum preparation process.
Fifth, LED hand-pricked chip: the expansion of LED chips placed in the pricking prevented in the fixture, with a magnifying glass will be placed in the corresponding position of the LED chip. Hand-pricked piece and automatic mounting frame, easy to replace different chips, using the installation of a variety of chips.
Six, LED pressure welding: the electrode tamper lead to the LED chip, complete the product internal link work. Pressure welding process has gold wire ball welding and aluminum wire pressure welding. First in the LED chip electrode pressure on the first point, and then pull the aluminum wire to the corresponding bracket above the pressure on the second point after tearing off the aluminum wire. Gold wire ball welding process in the pressure of the first point before burning a ball, the rest of the process is similar.
Seven, LED sintering: silver glue solid words, sintering difficult to control the temperature, generally control 150 ℃, burn 2 hours, without interruption, to avoid contamination.
Eight, LED test: optoelectronic parameter settings, the appearance of shape size, full color LED display screen classification
Nine, LED display packaging: anti-static packaging and counting packaging.