| FUKUDA CRYSTAL LABORATORY Patent applications |
| Patent application number | Title | Published |
|---|
| 20110117349 | ZINC OXIDE SINGLE CRYSTAL AND METHOD FOR PRODUCING THE SAME - To produce a zinc oxide single crystal having a sufficiently low lithium concentration and a high crystallinity. A zinc oxide crystal is grown by hydrothermal synthesis method using a solution having a lithium concentration of 1 ppm or less (weight basis), while suppressing a fluctuation range of crystal growth temperature within 5° C. or at a temperature within the range of 300 to 370° C. | 05-19-2011 |
| 20090165702 | SELF-COATED SINGLE CRYSTAL, AND PRODUCTION APPARATUS AND PROCESS THEREFOR - It is an object of the present invention to provide a self-coated single crystal that without any special step conducted after crystal growth, has its circumference coated with a layer of different properties. A self-coated single crystal according to the present invention is characterized in that in operations comprising melting crystal materials for a core and a clad in a single crucible and carrying out growth of a single crystal through a pulling up method or a pulling down method, a grown single crystal in an as-growth condition has its circumference self-coated with a clad whose refractive index is lower than that of the core. | 07-02-2009 |
