Japanese scientists invented a new generation of UV diode foundation CD

3 scientists xinhuanet.com Beijing May 20th - the Nippon Telegraph and Telephone Corp foundation research laboratory recently announced that they use aluminum nitride doped with silicon and magnesium has invented a diode can emit ultraviolet light (LED), to develop a new generation of optical disk data storage provides the basis for strong ability.

The 3 scientists in Japan in the latest issue of the British "nature" magazine published an article saying that the LED spectrum in deep ultraviolet region play a role in the wavelength of only 210 nm, is similar in the shortest wavelength of the device.

UV light is invisible to the eye, can emit ultraviolet LED with the use of biological and public health, such as can kill the bacteria in polluted water. They may also eventually replace the laser as a tool to read the disc data, because the laser consumes more energy.

Engineer in CD stuffing more and more, it will need to find a suitable light source to read data from the increasingly close track. To this end, they are constantly trying to look deep into the spectrum, from longer wavelengths of red to shorter wavelengths of blue and purple.

At present, the latest commercial laser industry standard is blue, its wavelength is 405 nm, in a DVD 27G data storage, storage capacity is far greater than the ordinary red light DVD4.5G.