超ちょう純じゅん水すい

noun

ultrapure water; UPW

Technical term in chemistry and semiconductor manufacturing for water purified to extremely high standards, with very low levels of organic compounds, particles, and dissolved gases.

• 半はん導どう体たい工こう場じょうでは超ちょう純じゅん水すいが大たい量りょうに使つかわれている。

  Ultrapure water is used in large quantities in semiconductor factories.