LED CHIP APPLIED TO DISPLAY SCREEN AND PREPARATION METHOD THEREFOR

摘要

Provided in the present application are an LED chip applied to a display screen and a preparation method therefor. The LED chip comprises a substrate, an epitaxial sheet, a composite conductive layer, a first passivation layer, a P electrode, and an N electrode. The composite conductive layer comprises an ohmic contact layer and at least two transparent conductive layers, and the compactness of the at least two transparent conductive layers gradually decreases along a preset direction, so that once the at least two transparent conductive layers are etched, the distance from the side surface of the composite conductive layer near a first region to the first region gradually increases along the preset direction, and then an angle formed between the side surface of the composite conductive layer near the first region and the first region is enlarged, so that the value of the angle thereof is located within the range of 140 degrees to 160 degrees, so as to improve the coating performance of the side surface of the subsequent first passivation layer at the composite conductive layer once the first passivation layer is formed, thereby reducing the probability of breakage of the portion of the first passivation layer located at the side surface of the composite conductive layer, and improving the reliability of the LED.