Positive polarity LED chip and manufacturing method thereof

Abstract

The invention provides a positive polarity LED chip and a manufacturing method thereof. Peripheral side walls of the epitaxial structure layer are inclined side walls, an included angle between the inclined side wall and a bottom surface of the epitaxial structure layer is an acute angle, a first electrode covering peripheral side walls and a top surface of the epitaxial structure layer is provided with a first hollow area, the first hollow area exposes a part of the top surface of the epitaxial structure layer. Therefore, light emitted by the light-emitting structure layer can be emitted fromthe first hollow area, moreover, a first electrode and the insulating layer covering a peripheral side wall of the epitaxial structure layer form an ODR layer, therefore, light rays emitted to the peripheral side walls by the light-emitting structure layer can be reflected, besides, the DBR reflecting layer located on the bottom surface of the epitaxial structure layer reflects the light emittedby the light-emitting structure layer, so the light emitted by the light-emitting structure layer is emitted only from the first hollow area, the light-emitting angle of the LED chip is small, and requirements of special fields such as precise opposite-type photoelectric switches can be met.

Description

technical field [0001] The invention relates to the technical field of semiconductor manufacturing, and more specifically relates to a positive polarity LED chip and a manufacturing method thereof. Background technique [0002] The light emitting surface of a conventional positive polarity LED chip includes the front surface of the chip and four side walls, that is to say, the conventional positive polarity LED chip is a chip that emits light from five sides. However, in special fields such as precise through-beam photoelectric switches, it is required that the light emitting angle of the LED chip is very small, and there is no stray light emitted from the side wall, which makes the conventional positive polarity LED chip unable to meet its application requirements. Contents of the invention [0003] In view of this, the present invention provides a positive polarity LED chip and a manufacturing method thereof, so as to reduce the light-emitting angle of the positive polar...

AI Technical Summary

Problems solved by technology

However, in special fields such as precise through-beam photoelectric switches, it is required that the light-emitting angle of the LED chip is very small, and there is no stray light emitted from the side wall, which makes the conventional positive polarity LED chip unable to meet its use requirements.

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