| abstract |
A conductive adhesive sheet having good temporary tension, blocking, and surface-to-surface adhesion, having good adhesive strength with a reinforcing plate, and having a conductive adhesive layer with good conductivity, and the same It is in providing the used printed wiring board. A conductive adhesive layer formed and used on a peelable film, wherein the peelable film side surface B has a surface roughness Ra of 3 to 6 μm, and the other surface A has a surface roughness. The problem is solved by a conductive adhesive layer characterized in that Ra is 0.2 to 1.1 μm. [Selection] Figure 1 |