Abstract:
PROBLEM TO BE SOLVED: To provide a prepreg obtained by using a halogen-free flame-retardant thermosetting resin composition excellent in molding properties and solder heat resistance, and a laminate for a printed wiring material and a metal foil-clad laminate obtained by using the prepreg. SOLUTION: The prepreg is obtained by combining a thermosetting resin (D) composition, comprising as an essential ingredient an aluminum oxide-boehmite composite (boehmite-compounded aluminum hydroxide) (A) obtained by a hydrothermal treatment of aluminum hydroxide, with a substrate (I). The laminated plate and the metal foil-clad laminate are obtained by using the prepreg. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a resin composition for a printed circuit board, which has excellent heat resistance and mechanical strength, and which particularly has excellent warpage characteristics and chemical resistance necessary for achieving process drive stability while basically maintaining a low dielectric constant and low hygroscopicity, and to provide an insulating film, a prepreg and a printed circuit board,.SOLUTION: The resin composition for a printed circuit board comprises a liquid crystal oligomer, an epoxy resin, and an inorganic filler which is a reaction product of silica, silane having a vinyl group and an alkoxy group, and vinyl or hydroxyl terminated silicone oil.
Abstract:
The present invention provides an epoxy resin composition exhibiting good workability in drilling, molding, and desmearing as well as good interlayer adhesion strength. This epoxy resin composition comprises an epoxy resin, a curing agent, and an inorganic filler. The epoxy resin is composed of a dicyclopentadiene-based epoxy resin and a novolac-based epoxy resin. The curing agent is a biphenyl-based phenol resin. The inorganic filler is composed of aluminum hydroxide and granular silica having an epoxy-silane treated surface. The epoxy resin composition contains 20 to 50% by weight of the granular silica. The epoxy resin composition contains 2 to 15% by weight, based on total weight of granular silica, of the aluminum hydroxide.
Abstract:
Provided is a copper foil for a printed circuit board comprising a layer including nickel, zinc, a compound of nickel and that of zinc (hereinafter referred to a "nickel zinc layer") on a roughened surface of a copper foil, and a chromate film layer on the nickel zinc layer, wherein the zinc add-on weight per unit area of the nickel zinc layer is 180µg/dm 2 or more and 3500µg/dm 2 or less, and the nickel weight ratio in the nickel zinc layer {nickel add-on weight 1 (nickel add-on weight + zinc add-on weight)} is 0.38 or more and 0.7 or less. This surface treatment technology of a copper foil is able to effectively prevent the circuit corrosion phenomenon in cases of laminating a copper foil on a resin base material and using a sulfuric acid hydrogen peroxide etching solution to perform soft etching to the circuit.