To improve dielectric characteristics, crack resistance, and characteristics after high temperature treatment.

An insulating layer is the insulating layer of a laminated plate and composed of a resin composition containing a benzocyclobutene resin and a compound having a bisphenol F structure. Metal foil with a resin has the insulating layer and metal foil. A carrier film with a resin has the insulating layer and a carrier film. A multi-layer printed circuit board is formed by laying the metal foil with the resin etc., on one side or both sides of an inner layer circuit board to overlap each other, and hot-pressing them.