Shimei Semiconductor Co. a company of Japan has developed a blue LED which is grown on silicon wafer. The company has plans to make its samples available by April next year.
The company has used silicon wafer as Substrate (a substance which is acted upon by enzymes) for growing GaN epitaxy and this new discovery has the potential to lower the cost as currently sapphire substrates are used for GaN ataxia growing. It will also simplify LED structures.
The prototype emits 450-nm wavelength blue light and has the output power of 10 mW with company sating to improve it in further testing.
The prototype is layered and consists of a cathode at bottom then followed by a silicon substrate, a buffer layers and an emitting layer then finally at the top comes an anode.
The company representative did not elaborate but said that buffers layers are different from conventional layer.
Now if this technology gets into mass production then it can change the future of Blu-ray as up till now it was costly and difficult to produce blue lasers.
Shimei has started readying production lines with the capacity of 3 million units per month
Via: EEtimes
