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    • 2. 发明申请
    • SILICONE BASED REFLECTIVE UNDERFILL AND THERMAL COUPLER
    • 基于硅胶的反射底座和热耦合器
    • US20110108865A1
    • 2011-05-12
    • US12613924
    • 2009-11-06
    • Rafael I. ALDAZGrigoriy BASINPaul S. MARTINMichael KRAMES
    • Rafael I. ALDAZGrigoriy BASINPaul S. MARTINMichael KRAMES
    • H01L33/00
    • H01L33/62H01L33/0079H01L33/382H01L33/60H01L33/641H01L33/642H01L33/647H01L2924/0002H01L2933/0091H01L2924/00
    • In one embodiment, a flip chip LED is formed with a high density of gold posts extending from a bottom surface of its n-layer and p-layer. The gold posts are bonded to submount electrodes. An underfill material is then molded to fill the voids between the bottom of the LED and the submount. The underfill comprises a silicone molding compound base and about 70-80%, by weight, alumina (or other suitable material). Alumina has a thermal conductance that is about 25 times better than that of the typical silicone underfill, which is mostly silica. The alumina is a white powder. The underfill may also contain about 5-10%, by weight, TiO2 to increase the reflectivity. LED light is reflected upward by the reflective underfill, and the underfill efficiently conducts heat to the submount. The underfill also randomizes the light scattering, improving light extraction. The distributed gold posts and underfill support the LED layers during a growth substrate lift-off process.
    • 在一个实施例中,倒装芯片LED形成有从其n层和p层的底表面延伸的高密度金柱。 金柱结合到底座电极。 然后将底部填充材料模制以填充LED底部和底座之间的空隙。 底部填充物包含硅氧烷模塑料基料和约70-80重量%的氧化铝(或其它合适的材料)。 氧化铝的导热系数比典型的硅胶底部填充物的热导率高出约25倍,这主要是二氧化硅。 氧化铝是白色粉末。 底部填充剂还可以含有约5-10重量%的TiO 2以增加反射率。 LED灯由反射底层填充物向上反射,底部填充物有效地将热量传导到底座。 底部填充物也随机化光散射,改善光提取。 分布式金柱和底层填料在生长衬底剥离过程中支持LED层。
    • 3. 发明申请
    • PACKAGE-INTEGRATED THIN FILM LED
    • 封装集成薄膜LED
    • US20110084301A1
    • 2011-04-14
    • US12969709
    • 2010-12-16
    • John EplerPaul S. MartinMichael R. Krames
    • John EplerPaul S. MartinMichael R. Krames
    • H01L33/48H01L33/36
    • 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。
    • 7. 发明授权
    • Light emitting diode device that emits white light
    • 发出白光的发光二极管装置
    • US06603258B1
    • 2003-08-05
    • US09556770
    • 2000-04-24
    • Regina Mueller-MachGerd O. MuellerPaul S. Martin
    • Regina Mueller-MachGerd O. MuellerPaul S. Martin
    • H01J154
    • H01L33/50H01L33/08
    • A white-light emitting diode (LED) is provided that emits primary light at a wavelength that is in the range of 485 to 515 nanometers (nm), which corresponds to a bluish-green color. A portion of the primary light is converted into a reddish-colored light that ranges in wavelength from approximately 600 to approximately 620 nm. At least a portion of the converted light combines with the unconverted portion of the primary light to produce white light. A number of phosphor-converting elements are suitable for use with the LED, including a resin admixed with a phosphor powder, epoxies admixed with a phosphor powder, organic luminescent dyes, phosphor-converting thin films and phosphor-converting substrates. Preferably, the phosphor-converting element is a resin admixed with a phosphor powder in such a manner that a portion of the primary light impinging on the resin is converted into the reddish-colored light and a portion of the primary light passes through the resin without being converted. The unconverted primary light and the phosphor-converted reddish-colored light combine to produce white light. The LED is mounted in a reflector cup that is filled with the phosphor-converting resin. The LED may be mounted in either a normal or flip-chip configuration within the reflector cup.
    • 提供一种白光发光二极管(LED),其发射波长在485至515纳米(nm)范围内的初级光,其对应于蓝绿色。 初级光的一部分被转换成波长从大约600nm到大约620nm的红色光。 转换的光的至少一部分与初级光的未转换部分组合以产生白光。 许多荧光体转换元件适用于LED,包括与荧光体粉末混合的树脂,与荧光体粉末混合的环氧树脂,有机发光染料,磷光体转换薄膜和磷光体转换基板。 优选地,磷光体转换元件是与荧光体粉末混合的树脂,使得入射到树脂上的初级光的一部分被转换成红色的光,并且一部分一次光通过树脂而没有 被转换。 未转换的初级光和磷光体转换的红色光结合产生白光。 LED安装在填充有磷光体转换树脂的反射杯中。 LED可以以反射杯内的正常或倒装芯片配置安装。
    • 9. 发明授权
    • Silicone based reflective underfill and thermal coupler
    • 硅基反射底部填充和热耦合器
    • US08471280B2
    • 2013-06-25
    • US12613924
    • 2009-11-06
    • Rafael I. AldazGrigoriy BasinPaul S. MartinMichael Krames
    • Rafael I. AldazGrigoriy BasinPaul S. MartinMichael Krames
    • H01L23/29
    • H01L33/62H01L33/0079H01L33/382H01L33/60H01L33/641H01L33/642H01L33/647H01L2924/0002H01L2933/0091H01L2924/00
    • In one embodiment, a flip chip LED is formed with a high density of gold posts extending from a bottom surface of its n-layer and p-layer. The gold posts are bonded to submount electrodes. An underfill material is then molded to fill the voids between the bottom of the LED and the submount. The underfill comprises a silicone molding compound base and about 70-80%, by weight, alumina (or other suitable material). Alumina has a thermal conductance that is about 25 times better than that of the typical silicone underfill, which is mostly silica. The alumina is a white powder. The underfill may also contain about 5-10%, by weight, TiO2 to increase the reflectivity. LED light is reflected upward by the reflective underfill, and the underfill efficiently conducts heat to the submount. The underfill also randomizes the light scattering, improving light extraction. The distributed gold posts and underfill support the LED layers during a growth substrate lift-off process.
    • 在一个实施例中,倒装芯片LED形成有从其n层和p层的底表面延伸的高密度的金柱。 金柱结合到底座电极。 然后将底部填充材料模制以填充LED底部和底座之间的空隙。 底部填充物包含硅氧烷模塑料基料和约70-80重量%的氧化铝(或其它合适的材料)。 氧化铝的导热系数比典型的硅胶底部填充物的热导率高出约25倍,这主要是二氧化硅。 氧化铝是白色粉末。 底部填充剂还可以含有约5-10重量%的TiO 2以增加反射率。 LED灯由反射底层填充物向上反射,底部填充物有效地将热量传导到底座。 底部填充物也随机化光散射,改善光提取。 分布式金柱和底层填料在生长衬底剥离过程中支持LED层。
    • 10. 发明授权
    • LED wafer with laminated phosphor layer
    • LED晶圆与叠层荧光粉层
    • US08232117B2
    • 2012-07-31
    • US12771809
    • 2010-04-30
    • Grigoriy BasinPaul S. Martin
    • Grigoriy BasinPaul S. Martin
    • H01L21/00
    • H01L33/0079H01L24/97H01L33/0095H01L33/22H01L33/50H01L2224/14H01L2224/81H01L2924/181H01L2933/0041H01L2924/00012
    • An LED wafer with a growth substrate is attached to a carrier substrate by, for example, a heat-releasable adhesive so that the LED layers are sandwiched between the two substrates. The growth substrate is then removed, such as by laser lift-off. The exposed surface of the LED layers is then etched to improve light extraction. A preformed phosphor sheet, matched to the LEDs, is then affixed to the exposed LED layer. The phosphor sheet, LED layers, and, optionally, the carrier substrate are then diced to separate the LEDs. The LED dice are released from the carrier substrate by heat or other means, and the individual LED dice are mounted on a submount wafer using a pick-and-place machine. The submount wafer is then diced to produce individual LEDs. The active layer may generate blue light, and the blue light and phosphor light may generate white light having a predefined white point.
    • 具有生长衬底的LED晶片通过例如可热剥离的粘合剂附接到载体衬底,使得LED层夹在两个衬底之间。 然后去除生长衬底,例如通过激光剥离。 然后蚀刻LED层的暴露表面以改善光提取。 然后将与LED相匹配的预成型荧光体片固定到暴露的LED层。 然后对磷光体片,LED层和任选的载体衬底进行切割以分离LED。 LED芯片通过加热或其他方式从载体基板释放,并且使用拾放机将各个LED芯片安装在底座晶片上。 然后将底座晶片切割以产生单独的LED。 有源层可以产生蓝光,并且蓝光和荧光光可以产生具有预定白点的白光。