エレクトロニクス材料としてのシリカ : 人工水晶

概要

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Quartz is one of the most familiar minerals on the earth crust. It has been used as an ornament and for religious belief because of the beautiful shape and the transparency since ancient times. Nowadays, quartz is used for frequency-control devises from the stability. The major applications are watches, personal computers, mobile communication systems and so on. The worlds annual production of quartz crystal is estimated at around 2500-3000×103kg. The production in Japan amounts to 900×103 kg, which accounts for one-third in the world. Japan is also ahead on the quartz devise technology, especially, for small and high precision devises. The uses and characteristics of quartz devises, the outline of synthetic quartz growth technique and the quality are introduced in this paper.
2002-01-30