Abstract:
PROBLEM TO BE SOLVED: To provide a prepreg giving a laminate for a thin type printed wiring board, excellent in solder heat resistance, and suppressing warpage occurring at heating such as reflow soldering.SOLUTION: This prepreg (100) is obtained by impregnating an organic fibrous base material (101) having ≤0 ppm/°C of a linear expansion coefficient in a range of 50°C to 150°C with a resin composition including a thermosetting resin. When the organic fibrous base material (101) is sequentially subjected to, by using a thermogravimetry device: a preliminary drying step (A) of measuring the weight loss rate A by holding the organic fibrous base material (101) at 110°C for 1 hour; and a measuring step (B) of measuring the weight loss rate B by heating the organic fibrous base material (101) at 10°C per 10 minutes from 25°C to 300°C, the value calculated by B-A is ≤0.30%.
Abstract:
PROBLEM TO BE SOLVED: To provide resin composite with which a multilayer printed wiring board in which peeling and a crack do not occur in a thermal shock test such as a cold and heat cycle, and which has high thermal resistance, low thermal expansion property and fire retardancy can be manufactured when resin composite is used for an insulating layer of the multilayer printed wiring board; and to provide an insulation sheet with substrate using resin composite and the multilayer printed wiring board. SOLUTION: Resin composite used for forming the insulating layer of the multilayer printed wiring board comprises (A) cyanate resin and/or its prepolymer, (B) epoxy resin, (C) phenoxy resin, (D) imidazole compound, and (E) inorganic fill. (D) imidazole compound has compatibility with (A) to (C) compounds. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a resin composition capable of producing a laminate sheet superior in hardenability, low thermal expansion coefficient, low dielectric constant and heat resistance, a prepreg using the same and a laminate sheet. SOLUTION: This resin composition is used for use in formation of the prepreg in a sheet form by impregnation of the resin composition into a substrate. The resin composition comprises a cyanate resin and/or its prepolymer, an epoxy resin containing substantially no halogen atom, an imidazole compound of 15% or less weight loss by sublimation or decomposition at 200°C and an inorganic filler. The prepreg produced by impregnation of the resin composition into the substrate and the laminate sheet produced by molding the prepreg are provided. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an insulation sheet superior in high heat resistance, low thermal expansion property, a dielectric property, a laser workability and flame retardant property. SOLUTION: This insulation sheet is used for forming an insulating layer in a printed circuit board, and obtained by flowing, extending and applying varnish containing a resin composite containing a cyanate resin and/or its pre-polymer, an epoxy resin substantially not containing a halogen atom, imidazol compound, an inorganic filler, and a solvent on one face or both faces of an insulating base material, by removing the solvent by heat-drying, and by forming into a film. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an insulating sheet having excellent high heat resistance, low thermal expansivity, dielectric characteristics, workability and flame resistance. SOLUTION: The insulating sheet has a first layer composed of a resin composition containing a thermosetting resin and inorganic fillers, and a second layer composed of an insulating base material. In the insulating sheet, the thermosetting resin comprises a cyanate resin and/or its prepolymer. In the insulating sheet, a novolac type cyanate resin is used as the cyanate resin. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a prepreg excellent in dielectric property, laser-processing property and flame retardant property, and a printed circuit board. SOLUTION: The prepreg is obtained by impregnating a resin composition containing a cyanate resin and/or its prepolymer and an inorganic filler with a nonwoven fabric constituted by an organic fiber, and exhibits ≤50 ppm/°C thermal expansion coefficient in surface direction at or lower than a glass transition point of a cured material obtained by curing the prepreg. Also, the printed circuit board is obtained by laminating a metal foil on the prepreg and heating/compressing for forming. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a resin composition, a prepreg and a printed circuit board having excellent heat resistance, low thermal expansion and a high level of flame-retardancy. SOLUTION: The resin composition comprises a cyanate resin and/or its prepolymer, a phenol resin and an inorganic filler. Additionally, the prepreg is prepared by impregnating a base material in the above resin composition. The printed circuit board of is prepared by laminating a metal foil on the above prepreg and molding the product under heating and pressure.
Abstract:
PROBLEM TO BE SOLVED: To improve a fire resistance, etc., of an inter-layer insulating adhesive for multilayer interconnection board by comprising a sulfur containing amorphous thermo-plastic resin, weight-average molecular weight in specified range of sulfur containing epoxy resin, multifunctional epoxy resin of epoxy equivalent to a specific value or less, epoxy settling agent, and phosphorus containing compound agent. SOLUTION: An interlayer insulating adhesive for multilayer interconnection board comprises, as essential component, a phosphorus containing amorphous thermo-plastic resin containing polysulfone and polyethersulfone of weight- average molecular weight 103-105, phosphorus containing epoxy resin such as bisphenol type epoxy resin, novolak type epoxy resin, biphenyl type epoxy resin, dicyclopentadiene epoxy resin of weight-average molecular weight 103-105, as well as multifunctional epoxy resin of epoxy equivalent 500 or less, epoxy curing agent, and phosphorus containing compound agent which does not contain halogen. Thus, fire-resistance and heat characteristics are improve.
Abstract:
PROBLEM TO BE SOLVED: To obtain a multi-layer flexible printed circuit board having excellent flame retardance and heat resistance, preservation stability and slight variation of insulating resin thickness between circuit layers in spite of possession of glass cloth-free insulating layer. SOLUTION: This interlayer insulating resin for a multi-layer printed circuit board comprises (1) a sulfur component-containing amorphous thermoplastic resin having 103 to 105 weight-average molecular weight, (2) a sulfur-containing epoxy resin or phenoxy resin having 103 to 105 weight-average molecular weight, (3) a polyfunctional epoxy resin having
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing a thin type multilayed printed wiring board which has little thickness variations and smooth surface and is suited to highdensity packaging. SOLUTION: The manufacturing method comprises the steps of applying a photo-setting/thermosetting type under-coating 3 to a flame-retardant inner layer circuit board 1 composed of a flame-retardant epoxy resin-impregnated glass cloth board, irradiating an active energy to make tack-free, laminating a Cu foil having a layer insulation adhesive layer, and heating so that the melting viscosity of this adhesive layer does not fall below 10,000 poises, and the under-coating 3 starts the curing reaction with the melting viscosity ranging between 1,000 poises and 10,000 poises prior to the start of the curing reaction of the adhesive layer, thereby finally curing both together.