Single LED Chip Produces More Than 150 Watts of Output
In the latest issue of Electronics Letters, a team from Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Xiangneng HuaLei Optoelectronic Co. Ltd. and several Universities in China, report successful creation of a single wafer level LED chip producing more than 150W output, using a single chip assembly approach.
In single chip assembly, integrated circuits are created on a wafer substrate as normal, but are then assembled without being separated from the wafer. This approach allows the creation of LED chips with areas a hundred times bigger than the highest-power LED chips previously produced. Such large chip areas normally incur an exponential drop-off in the yield achievable – avoiding this is the key advance of the work reported in this issue. It required a combination of other smaller advances, as team leader Prof. Yong Cai explained: “We developed several technologies, including series and parallel network designs, resistor matching, active liquid heat dissipation and plug-in electrodes, to successfully fabricate this chip.”
Read more at: http://phys.org/news/2014-12-bright-future.html#jCp