About YAMAMOTO EIICHI
About 岡本工作機械製作所 技術開発本部
About advanced technology
About precision grinding
About polishing machine
About silicon
About silicon carbide
About gallium nitride
About light emitting diode
About substrate(plate)
About sapphire
About brittleness
About flatness(property)
About Grinding
About Manufacturing technology of solid-state devices
About 精密研磨
About 最新動向
About 研磨
About 高能率
About ポリシングマシン
About 片面
About 研磨機