Light-emitting device based on ceramic substrate and manufacturing method thereof

Abstract

The invention discloses a light emitting device based on a ceramic substrate and a manufacturing method for the light emitting device. The light emitting device comprises at least one light emitting diode (LED) chip and the ceramic substrate for bearing the LED chips, wherein at least one first chip electrode and at least one second chip electrode are arranged on the lower surface of each LED chip; the first chip electrode is dispersively distributed between two second chip electrodes in a dot matrix mode; a first substrate electrode and a second substrate electrode are arranged on the upper surface of the ceramic substrate; the first substrate electrode comprises a first base and at least one first fork finger; the upper surface of the first substrate electrode is electrically connected with the first chip electrode; the second substrate electrode comprises a second base and at least one second fork finger; and the upper surface of the second substrate electrode is electrically connected with the second chip electrodes. According to the light emitting device, a process requirement on the LED chips is reduced, so that dispersed electrodes on the LED chips can be distributed more densely; and therefore, the uniformity of current distribution and the light emitting efficiency are improved.

Description

technical field [0001] The invention relates to a solid light-emitting device and a manufacturing method thereof, in particular to a ceramic substrate-based light-emitting device with high luminous efficiency and a manufacturing method thereof. Background technique [0002] As the luminous efficiency of light-emitting diodes (LEDs) continues to increase, LEDs have undoubtedly become one of the most valued light sources in recent years. LED is a kind of lighting source with energy saving and environmental protection characteristics, which combines high light efficiency, low energy consumption, low maintenance cost and other excellent performances. Theoretically, it is estimated that the luminous efficiency of semiconductor LED lighting fixtures can reach or even exceed 10 times that of incandescent lamps and 2 times that of fluorescent lamps. At present, the goal of LED technology development is high-efficiency, all-solid-state, and environmentally friendly LEDs, and promote...

AI Technical Summary

Problems solved by technology

However, this method of connecting discrete electrodes on the LED chip to the metal electrode layer on the bottom of the LED chip requires high wiring processing precision, and the line width or spacing of the metal layer is relatively large, so it is difficult to effectively increase the contact area with the N-ohm contact layer. , resulting in a large current difference between the connection points of each N ohm contact layer, and the local current density is too high, resulting in a decrease in luminous efficiency

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