Title:
METHOD OF MANUFACTURING LIGHT EMITTER, LIGHT EMITTER AND ULTRAVIOLET LIGHT SOURCE
Document Type and Number:
WIPO Patent Application WO/2022/059641
Kind Code:
A1
Abstract:
A method of manufacturing a light emitter that emits ultraviolet light. The light emitter contains YPO4 crystal, to which at least scandium (Sc) is added, and emits ultraviolet light when exposed to an excitation light or an electron beam having a shorter wavelength than ultraviolet light. This method comprises a first mixture preparation step, a second mixture preparation step, a third mixture preparation step and a third mixture baking step. In the first mixture preparation step, a first mixture containing an yttrium (Y) compound, a scandium (Sc) compound, phosphoric acid or a phosphoric acid compound and a liquid is prepared. In the second mixture preparation step, a powdery second mixture is prepared by evaporating the liquid. In the third mixture preparation step, a third mixture is prepared by mixing the second mixture with an alkali metal halide and/or an alkali metal carbonate.
Inventors:
IKEDA KOHEI (JP)
ICHIKAWA NORIO (JP)
ICHIKAWA NORIO (JP)
Application Number:
PCT/JP2021/033519
Publication Date:
March 24, 2022
Filing Date:
September 13, 2021
Export Citation:
Assignee:
HAMAMATSU PHOTONICS KK (JP)
International Classes:
C09K11/08; C09K11/81; H01J9/22; H01J61/44; H01J63/02; H01J63/06
Domestic Patent References:
| WO2018235723A1 | 2018-12-27 |
Foreign References:
| JP2008536282A | 2008-09-04 | |||
| JP2017165877A | 2017-09-21 | |||
| JP2020097639A | 2020-06-25 |
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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