Development Update of High Index Lens Material LuAG - Sematech
Development Update of High Index Lens Material LuAG - Sematech
Development Update of High Index Lens Material LuAG - Sematech
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SCHOTT Lithotec <strong>High</strong> <strong>Index</strong> <strong>Lens</strong> <strong>Material</strong> <strong>LuAG</strong><br />
Summary and Outlook<br />
� Champion Absorption actually at k 0= 0,035 cm -1 (bulk + surface !)<br />
homogenous in the whole volume <strong>of</strong> 80mm dia crystal<br />
� Growth run with higher quality Al 2O 3 purified by zone refining<br />
scheduled for end October (last step AIP)<br />
� Potential <strong>of</strong> zone refining method not developed yet.<br />
� DOE started<br />
� Next production run ongoing<br />
� Optimization <strong>of</strong> zone refining needs 4 month<br />
� Next improvement step towards absorption target 0.005cm -1 required<br />
upscaling <strong>of</strong> growth machine<br />
� How to go ahead with the <strong>LuAG</strong> program?<br />
21 5 th Intern. Immersion Symposium<br />
22-25.9.2008, The Hague, NL,
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