Color separation filter

Abstract

Abstract PURPOSE:To improve resolving performance and optical characteristics of a color separation filter by dyeing a dyed layer on a substrate with a compd. having plural numbers of amino acid group and at least one COOH group in a molecule together with a dye. CONSTITUTION:A desired pattern of a layer to be dyed comprising gelatin, etc., is formed on a silicon substrate or glass substrate 1 provided with a light receiving part interposing a layer 2 of an org. high molecular compd. Obtd. layer is dyed after treating with a pretreating liquid contg. a compd. having plural numbers of amino group and at least one COOH group, or dyed with a dyeing liquid contg. a mixture of said compd. and a dye. To prepare thus a color separation filter 3a (dyed pattern). The thus prepd. color separation filter has sufficiently high optical density (extinction coefft.) in spite of its small film thickness.

Inventors

• 👤 Shoji Suzuki
• 👤 章司 鈴木
• 👤 Hideo Saeki
• 👤 佐伯　英夫

Bibliographic Details