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1. (WO2017038665) SAPPHIRE RIBBON

Pub. No.:    WO/2017/038665    International Application No.:    PCT/JP2016/074930
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Sat Aug 27 01:59:59 CEST 2016
IPC: C30B 29/20
C30B 15/34
Applicants: NAMIKI SEIMITSU HOUSEKI KABUSHIKI KAISHA
並木精密宝石株式会社
Inventors: KOTAKI Toshiro
古滝 敏郎
SATO Tsugio
佐藤 次男
SEKII Takashi
関井 崇
ITO Norihiko
伊藤 訓彦
KAMATA Kazuhiko
鎌田 一彦
SASAKI Tadashi
佐々木 忠
HIGUCHI Kazuto
樋口 数人
Title: SAPPHIRE RIBBON
Abstract:
Provided is a sapphire ribbon that is grown by EFG. When pulling-up is complete, the r-axis direction of the sapphire ring can be determined by sight without using X-ray diffraction. According to the present invention, a sapphire ribbon that has an r-axis direction that can be seen by magnifying glass can be obtained by forming a multi-sapphire ribbon that has a c face as a main face thereof and by forming a two-layered euhedral face that comprises an r face and an R face on a spreading-part-side face of the sapphire ribbon.