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  • Cree Buys Gallium-Nitride Substrate Business

Photonics Spectra
Jun 2004
For $10.25 million, Cree Inc. of Durham, N.C., has acquired the gallium-nitride substrate and epitaxy business of Advanced Technology Materials Inc., a wholly owned subsidiary of ATMI Inc., based in Danbury, Conn. Besides a technical team and a core technology that could benefit lasers and microwave devices, the purchase has brought Cree 17 US patents and additional patent applications that complement its intellectual property portfolio. A patent for white LEDs and related technology is expected to strengthen the company's XLamp business and its position in the LED-based lighting market. Cree's products include blue, green and near-UV LEDs, near-UV lasers, and radio-requency, microwave and power-switching devices.

A well controlled thin films technique for growing films with good crystal structure in ultra high vacuum environments at very low deposition rates. Epitaxy methods are well known for the growing of single crystals in which chemical reactions produce thin layers of materials whose lattice structures are identical to that of the substrate on which they are deposited. Some examples are molecular beam epitaxy, liquid phase epitaxy and vapor phase epitaxy. Molecular beam epitaxy is also commonly...
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