Patent ID: 11632859

Abstract:
Provided is a long laminate for a printed wiring board, which has reduced thickness of a resin layer and increased signal transmission speed, and which, while being excellent in dimensional stability and folding endurance, has no wrinkles in a fluororesin layer. The long laminate contains a metal layer of a long metal foil, a fluororesin layer containing a fluororesin and contacting the metal layer, and a heat-resistant resin layer containing a heat-resistant resin and contacting the fluororesin layer. Each fluororesin layer is 1 to 10 μm thick. The ratio of the total thickness of the fluororesin layer to the total thickness of the heat-resistant resin layer is 0.3 to 3.0. The sum of the total thickness of the fluororesin layer and the total thickness of the heat-resistant resin layer is at most 50 μm. Also provided are a method for producing the long laminate, and the printed wiring board.