Abstract: A laminate for printed wiring board is used in a method of manufacturing printed wiring boards that includes a process of forming a circuit by any one of a semi-additive method, a partly additive method, a modified semi-additive method, and an embedding method. The laminate includes an insulating resin substrate, a metal layer 1 and a metal layer 2 in this order.

Abstract: A laminate for printed wiring board is used in a method of manufacturing printed wiring boards that includes a process of forming a circuit by any one of a semi-additive method, a partly additive method, a modified semi-additive method, and an embedding method. The laminate includes an insulating resin substrate, a metal layer 1 and a metal layer 2 in this order.

Abstract: A copper foil composite comprising a copper foil and a resin layer laminated thereon, wherein elongation after fracture of the copper foil is 5% or more, and wherein (F×T)/(f×t)?1 is satisfied when t is a thickness of the copper foil, f is a stress of the copper foil under tensile strain of 4%, T is a thickness of the resin layer and F is a stress of the resin layer under tensile strain of 4%.

Abstract: An electromagnetic shielding material 50 comprising a plurality of copper foil composites 10 connected together in a longitudinal direction L, the composite having a copper foil 2 and a resin film 4 which are laminated, wherein an overlapped part 50k of the copper foil composites is adhered with an epoxy based adhesive 6 comprising as main components an epoxy resin and one or more of flexibility providing resins selected from the group consisting of nitrile butadiene rubber, natural rubber, styrene butadiene rubber, butadiene rubber, ethylene propylene rubber, isoprene rubber, urethane rubber and acrylic rubber, and wherein the epoxy based adhesive disposed at the overlapped part of the copper foil composites has a length LA in the longitudinal direction of 1 to 6 mm.

Abstract: The present invention provides a Cu—Cr—Zr alloy material excellent in fatigue and intermediate temperature characteristics, which comprises 0.05 to 1.0% by mass of Cr and 0.05 to 0.25% by mass of Zr with a balance of Cu and inevitable impurities. The alloy comprises inclusion particles based on any one of Zr and a Cu—Zr alloy having a diameter of 0.1 ?m or more, and the proportion of the inclusion particles containing 10% or more of sulfur as one of the inevitable impurities is one particle/mm2.

Abstract: The present invention provides a Cu—Cr—Zr alloy material excellent in fatigue and intermediate temperature characteristics, which comprises 0.05 to 1.0% by mass of Cr and 0.05 to 0.25% by mass of Zr with a balance of Cu and inevitable impurities. The alloy comprises inclusion particles based on any one of Zr and a Cu—Zr alloy having a diameter of 0.1 &mgr;m or more, and the proportion of the inclusion particles containing 10% or more of sulfur as one of the inevitable impurities is one particle/mm2.