Light-emitting diode (LED) packaged with AlSiC composite substrate

Abstract

The invention discloses an LED packaged with an AlSiC composite substrate. The LED comprises the AlSiC composite cooling substrate, an LED light source module, gold threads and an alumina ceramic frame, wherein the surface of the AlSiC composite cooling substrate is plated with a copper film and a silver film sequentially; the LED light source module is packaged on the AlSiC composite cooling substrate; the alumina ceramic frame is arranged on the outer side of the LED light source module and adheres to the LED light source module; two copper-film electrodes are plated on the alumina ceramic frame and connected with a positive pole and a negative pole of the LED light source module through the gold threads respectively. According to the LED, thermal expansion coefficients of the AlSiC composite substrate and an LED chip material are matched, so that an LED chip which is packaged on the substrate is not prone to falling, and the service life of the LED is prolonged.

Description

Technical field [0001] The invention relates to an LED packaged on a board, in particular to an LED packaged with an AlSiC composite substrate. Background technique [0002] With the development of microelectronic devices in the direction of high performance, light weight and miniaturization, microelectronics put forward more and more stringent requirements for packaging materials. Traditional packaging materials include silicon substrates, metal substrates and ceramic substrates. Silicon and ceramic substrates are difficult to process, high in cost, and low in thermal conductivity; the thermal expansion coefficient of metal materials does not match that of the microelectronic chip, and thermal stress and warpage will occur during use. Therefore, these traditional packaging materials are difficult to meet the demanding requirements of packaging substrates. This is particularly important for high-power LEDs. [0003] The newly developed heat dissipation substrate materials at hom...

AI Technical Summary

Problems solved by technology

Among them, the thermal conductivity of the metal core printed circuit board is limited by the insulating layer, the thermal conductivity is low, and on-board packaging cannot be realized; the copper-clad ceramic board adopts a direct bonding method to bond ceramics and metals together, which improves the thermal conductivity. At the same time, the thermal expansion coefficient is controlled in an appropriate range, but the reaction ability of metal and ceramics is low, and the wettability is not good, which makes the bonding difficult, the interface bonding strength is low, and it is easy to fall off; High dimensional accuracy is required, the process is complex, and there are also problems of poor wettability and easy fall off of metal and ceramics

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