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Technology Stocks : White light from LED
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To: John Finley who wrote (111)3/18/2000 4:46:00 PM
From: kinkblot  Read Replies (3) of 565
 
Sumitomo: Development of GaN Single-Crystal

SEI NEWS No.00-02, February 2000
sei.co.jp

Utilizing the thermodynamic developments and expertise of Professor Seki and Assistant Professor Koukitu of the Faculty of Engineering of Tokyo University of Agriculture and Technology and drawing from its own unique methodology, Sumitomo Electric has expanded upon previously cultivated technology to successfully grow two-inch crystal substrates for epitaxy. The gallium nitride single-crystal substrate is conductive, which allows electrodes to be placed on both sides of the chip. Compared with sapphire, gallium nitride should reduce chip size in half and lower costs. A reflection plane, which is required for manufacturing laser chips, is generally made with a cleavage plane.

They're using thermodynamics? That's not fair. <g>
High-tech pluggers.

WT
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