| abstract |
A back grinding tape having a sheet-shaped substrate and an adhesive agent layer formed on one surface of the substrate, wherein the adhesive agent layer comprises a cured product of an adhesive agent composition and is 50-500 μm thick, the adhesive agent composition includes a polyurethane (A), a (meth)acrylate monomer (B), a chain transfer agent (C), a photopolymerization initiator (D), and 0.4-6 mass% of an ionic liquid (E), and the polyurethane (A) includes a polyurethane (a1) having a skeleton that includes a structure derived from a polyoxyalkylene polyol and a structure derived from a polyisocyanate, and having (meth)acryloyl groups at a plurality of ends. |