French startup Aledia has manufactured the world’s first microLED chips produced on 300mm (12”) silicon wafers.
该公司于2012年从研究小组CEA-LETI中脱颖而出，已经在200mm晶片上生产了其微胶片，并且将使用两种技术在CEA-LETI上使用了300mm PILT系列。较大的晶圆可提供更好的经济回报和与较小节点电子产品的更好的经济回报和成本效益的整合，仅在300mm的硅瓦夫夫（Silicon Wafers）上可用。
“We believe producing microLEDs on large-area 300mm silicon wafers is a world’s first, and opens this technology to huge potential-volume-manufacturing capabilities,” said Giorgio Anania, Aledia CEO and cofounder. “The larger size allows 60-100 smartphone displays to be made on a single 300mm wafer, versus approximately four-to-six using the present LED industry-standard, 4” sapphire substrate. Thanks to Aledia’s unique nanowire LED technology (3D LED), this can be done with commercially available processes and equipment, since it uses standard-thickness (780µm) silicon wafers.”
Traditional planar microLEDs are produced by depositing flat layers of gallium-nitride (GaN) crystal on sapphire wafers of 100-150mm diameter, with the majority of production today being on 100mm (4”) wafers. Aledia’s microLED technology grows GaN nanowires on top of large areas of silicon. This 3D nanowire technology does not create any of the stresses seen on 2D chips, which build up as the wafer size is increased, and so allows the use of very large-size wafers. In addition, this silicon-based technology allows production in mainstream foundries and can be ramped up to high volume production with high yield.
“We are very pleased to have helped Aledia push forward the state of the art of 3D LED manufacturing using our 300mm silicon processing line. We believe large-area silicon wafers are the best manufacturing platform in the world today for displays, and give big advantages in manufacturability,” said Emmanuel Sabonnadière, CEO of CEA-Leti. “3D nanowire micro-LEDs have the potential to make serious penetration into large display markets. CEA-Leti is very active today in supporting the display industry’s transition to micro-LED technology.”
“We believe the use of large-area silicon wafers and microelectronics foundries
