Adamant Namiki Precision Jewel Co. Ltd.
American Elements
Crystalwise Technology Inc.
Hansol Technics Co. Ltd.
Iljin Display Co. Ltd.
Juropol Sp. z o.o.
KYOCERA CORP.
Monocrystal Inc.
ON SEMICONDUCTOR CORP.
Rayotek Scientific Inc.
Rubicon Technology Inc.
Saint-gobain S.a.
SCHOTT AG