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Breakthrough in Blu-Ray technology

18 April 2003 5:34 by Jari Ketola | 2 comments

Japanese Sumitomo Electric Industries has started to mass produce two inch low-dislocation gallium nitride (GaN) substrates. GaN semiconductors are used to produce the violet (405nm) laser used for reading and recording Blu-Ray, and other "blue laser" formats. Low-dislocation GaN substrate is superior to sapphire substrates, which suffer from high dislocation (crystal defects) and hence have a low yield.

Sumitomo is currently capable of producing 200 substrates a month, but will step up production to 500 by October.

To learn more about Sumitomo's method read their article on GaN substrate.

Source:
the inquirer

Permalink to this article

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DVD Forum chose NEC/Toshiba blue laser technology (11 November 2002)

First Blu-Ray laser controllers available (11 September 2002)

NEC and Toshiba introduce another blue-laser DVD technology (26 August 2002)

Sanyo to mass-produce blue-laser parts (10 August 2002)

China and Taiwan to develop royalty-free DVD standards (29 May 2002)

Manufacturers agree to create uniform blue-laser DVD standard (19 February 2002)

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Discuss this article!
fedrive (Inactive) 20 April 2003 11:25
patented UV/Blue Holographic Storage http://www.colossalstorage.net [ + quote]
dvdrob (Newbie) 23 April 2003 20:08
lets see if blu ray really takes off http://www.burningbits.com [ + quote]