PHOTOSENSITIVE RESIN COMPOSITION, DRY FILM, CURED PRODUCT AND PRINTED WIRING BOARD

To provide a photosensitive resin composition excellent in a coating property and a film forming property as well as excellent in developability and resolution and capable of improving productivity of a dry film.SOLUTION: The photosensitive resin composition of the present invention comprises a carboxyl group-containing resin A having a weight average molecular weight of 1500 or more and less than 5000, a carboxyl group-containing resin B having a weight average molecular weight of 5000 or more and 150000 or less, an epoxy resin, a photopolymerization initiator, a photosensitive monomer, and an inorganic filler, in which a compounding ratio of the carboxyl group-containing resin A to the carboxyl group-containing resin B is 6:4 to 3:7 on a mass basis, and the content of the inorganic filler is 40 to 300 parts with respect to 100 parts of the carboxyl group-containing resin included in the photosensitive resin composition.SELECTED DRAWING: None 【課題】塗工性および製膜性に優れると共に、現像性および解像性に優れ、ドライフィルムの生産性を向上させることのできる、感光性樹脂組成物の提供。【解決手段】本発明による感光性樹脂組成物は、重量平均分子量が、１５００以上、５０００未満のカルボキシル基含有樹脂Ａと、重量平均分子量が、５０００以上、１５００００以下のカルボキシル基含有樹脂Ｂと、エポキシ樹脂と、光重合開始剤と、感光性モノマーと、無機フィラーと、を含み、カルボキシル基含有樹脂Ａと、カルボキシル基含有樹脂Ｂとの配合比が、質量基準で、６：４〜３：７であり、前記無機フィラーの含有量が、感光性樹脂組成物に含まれるカルボキシル基含有樹脂１００部に対し、４０〜３００部であることを特徴とする。【選択図】なし