【摘要】 金刚石是自然界导热率最高的材料,具备极佳的耐热和导热性能。基于金刚石导热的散热结构,大大提高了超高功率LED的散热能力。介绍了三种金刚石散热结构:氮化镓与金刚石直接结合实现GaN-ondiamond光与热集成的结构;在传统的LED光源中增加金刚石薄膜作为高导热层的散热结构;以金刚石复合材料做成的LED热沉结构。理论上,三种结构中第一种结构的散热效果最好,与目前最先进的碳化硅衬底LED相比,其结温降低了40%~45%。更多还原

【Abstract】 With excellent heat resistance and thermal performance, diamond is the material possessing the highest thermal conductivity in nature. The thermal structures based on diamond can greatly improve the cooling capacity of ultra-high-power LED. Summarize three kinds of diamond thermal structure used in ultra-high-power LED light source: GaN-on-diamond structure integrating light and thermal was realized by combining GaN with diamond directly; structure with diamond film as the powerful dissipation layer added in the traditional LED light source; structure with diamond composite material as LED heat sink. In theory, the heat dissipation effect of the first one is the best among these three structures, whose junction temperature is 40%~45% lower than that of state-of-the-art LED with SiC as substrate.更多还原