Ultra small and ultrathin high luminous efficiency lateral emission type high light white light polycrystalline LED element

[0036] Preferred embodiment one: as figure 1 There are two light-emitting LED chips 2 shown, and the positive wires 4 of the two light-emitting LED chips 2 are welded to the positive region 71 in the middle, and the two negative wires 5 are respectively connected to two mutually independent negative regions 72 on both sides. welding. The ultra-small, ultra-thin, high-efficiency side-firing high-brightness white light twin-crystal LED element is rectangular: its length is 1.6±0.2mm, its width is 0.6±0.2mm, and its thickness d is 0.3±0.1mm. Preferably: length 1.6mm, width 0.6mm, thickness 0.3mm.

[0037] Preferred embodiment two: as figure 2 , 3 There are three light-emitting LED chips 2 shown, and the positive wires 4 of the three light-emitting LED chips 2 are all welded to the positive region 71 in the middle, and the three negative wires 5 are respectively welded to three mutually independent negative regions 72 on both sides. . The ultra-small, ultra-thin, high-efficiency side-firing high-brightness white three-crystal LED element is rectangular: its length is 1.6±0.2mm, its width is 0.6±0.2mm, and its thickness d is 0.4±0.1mm. Preferably: length 1.6mm, width 0.6mm, thickness 0.4mm.

[0038] A process for preparing an ultra-small, ultra-thin, high-efficiency side-firing high-brightness white polycrystalline LED element, the steps are as follows:

[0039] a. Prepare raw materials: Drill through holes on the PCB substrate 1 and conduct the upper and lower bottom surfaces of the PCB substrate 1 through the copper plugging process to form the plug hole copper pilla...