| 摘要 |
PROBLEM TO BE SOLVED: To provide a curable resin composition which contains a block type siloxane compound being excellent in transparency and light resistance, having excellent heat resistance, and being very useful as an optical semiconductor printed wiring board.SOLUTION: A reactive functional group-containing block type siloxane compound is a block type siloxane oligomer comprising a silsesquioxane segment of reactive functional group-containing siloxane and a following silicone resin segment (SR), and having at least one epoxy group in the silsesquioxane segment. |
