PROBLEM TO BE SOLVED: To provide a germanium-deposited sheet which is excellent in water resistance and adhesion between a substrate sheet and a germanium-deposited layer.SOLUTION: The substrate sheet is subjected to a plasma treatment so as to form a germanium-deposited layer on the plasma-treated surface. Optionally, a plasma-treated layer may be further formed on the germanium-deposited layer by plasma treatment.COPYRIGHT: (C)2010,JPO&INPIT【課題】基材シートとゲルマニウム蒸着層との密着性、耐水性に優れるゲルマニウム蒸着シートを提供する。【解決手段】基材シートにプラズマ処理を行い、前記プラズマ処理面にゲルマニウムの蒸着層を形成する。更に、前記ゲルマニウム蒸着層にプラズマ処理によるプラズマ処理層を形成してもよい。【選択図】なし