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    • 8. 发明授权
    • Package-integrated thin film LED
    • 封装集成薄膜LED
    • US07488621B2
    • 2009-02-10
    • US11421350
    • 2006-05-31
    • John E. EplerPaul S. MartinMichael R. Krames
    • John E. EplerPaul S. MartinMichael R. Krames
    • H01L21/00
    • H01L33/48H01L24/73H01L33/0079H01L33/22H01L33/32H01L33/486H01L2224/32225H01L2224/48091H01L2224/48227H01L2224/48464H01L2224/73265H01L2224/92247H01L2924/00014H01L2924/00012H01L2924/00
    • LED epitaxial layers (n-type, p-type, and active layers) are grown on a substrate. For each die, the n and p layers are electrically bonded to a package substrate that extends beyond the boundaries of the LED die such that the LED layers are between the package substrate and the growth substrate. The package substrate provides electrical contacts and conductors leading to solderable package connections. The growth substrate is then removed. Because the delicate LED layers were bonded to the package substrate while attached to the growth substrate, no intermediate support substrate for the LED layers is needed. The relatively thick LED epitaxial layer that was adjacent the removed growth substrate is then thinned and its top surface processed to incorporate light extraction features. There is very little absorption of light by the thinned epitaxial layer, there is high thermal conductivity to the package because the LED layers are directly bonded to the package substrate without any support substrate therebetween, and there is little electrical resistance between the package and the LED layers so efficiency (light output vs. power input) is high. The light extraction features of the LED layer further improves efficiency.
    • 在衬底上生长LED外延层(n型,p型和有源层)。 对于每个管芯,n和p层电连接到延伸超过LED管芯边界的封装衬底,使得LED层位于封装衬底和生长衬底之间。 封装衬底提供电触头和导体,导致可焊接的封装连接。 然后除去生长底物。 因为精细的LED层在附着于生长衬底的同时与封装衬底结合,所以不需要用于LED层的中间支撑衬底。 然后将与去除的生长衬底相邻的较厚的LED外延层变薄,并将其顶表面加工成掺入光提取特征。 通过减薄的外延层对光的吸收非常小,因为LED层直接接合到封装基板上而没有任何支撑基板,因此封装和LED之间的电阻很小,因此封装的导热性很高 层效率(光输出与功率输入)高。 LED层的光提取特性进一步提高了效率。
    • 10. 发明授权
    • Series connected flip chip LEDs with growth substrate removed
    • 串联连接的倒装芯片LED与生长衬底被去除
    • US08450754B2
    • 2013-05-28
    • US13269669
    • 2011-10-10
    • Michael R. KramesJohn E. EplerDaniel A. SteigerwaldTal Margalith
    • Michael R. KramesJohn E. EplerDaniel A. SteigerwaldTal Margalith
    • H01L29/18
    • H01L33/0079H01L21/2654H01L27/153
    • LED layers are grown over a sapphire substrate. Individual flip chip LEDs are formed by trenching or masked ion implantation. Modules containing a plurality of LEDs are diced and mounted on a submount wafer. A submount metal pattern or a metal pattern formed on the LEDs connects the LEDs in a module in series. The growth substrate is then removed, such as by laser lift-off. A semi-insulating layer is formed, prior to or after mounting, that mechanically connects the LEDs together. The semi-insulating layer may be formed by ion implantation of a layer between the substrate and the LED layers. PEC etching of the semi-insulating layer, exposed after substrate removal, may be performed by biasing the semi-insulating layer. The submount is then diced to create LED modules containing series-connected LEDs.
    • LED层生长在蓝宝石衬底上。 单个倒装芯片LED通过挖沟或掩模离子注入形成。 包含多个LED的模块被切割并安装在底座晶片上。 在LED上形成的基座金属图案或金属图案将模块中的LED串联连接。 然后去除生长衬底,例如通过激光剥离。 在安装之前或之后形成半绝缘层,将LED机械连接在一起。 半绝缘层可以通过在衬底和LED层之间离子注入层来形成。 可以通过偏置半绝缘层来执行衬底去除后露出的半绝缘层的PEC蚀刻。 然后将底座切成块,以创建包含串联LED的LED模块。