Method of manufacturing single crystal calcium fluoride

Single-crystal – oriented-crystal – and epitaxy growth processes; – Processes of growth with a subsequent step of heat treating...

Reexamination Certificate

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C117S204000

Reexamination Certificate

active

07105049

ABSTRACT:
A method for manufacturing calcium fluoride single crystal includes the step of cooling the calcium fluoride single crystal so that maximum shear stress inside the calcium fluoride single crystal caused by thermal stress is approximately equal to or smaller than critical resolved shear stress (τc) in a <1 1 0> direction of on a {0 0 1} plane of the calcium fluoride single crystal.

REFERENCES:
patent: 6332922 (2001-12-01), Sakuma et al.
patent: 6624390 (2003-09-01), Motakef et al.
patent: 2002/0182863 (2002-12-01), Chiba
patent: 11-240787 (1999-09-01), None
patent: 11-240798 (1999-09-01), None

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