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:
An electronic assembly including a circuit board (16) and a flexible circuit interconnect (14) is overmolded by fixturing the assembly in a mold cavity such that a portion of the flexible circuit (14) protrudes from the mold, and providing a compressible elastomeric interface (18a/20a, 32) between the mold (18, 20) and the flexible circuit (14) to seal off the mold cavity and protect the flexible circuit (14) from damage due to the clamping force of the mold (18, 20). The portion of the flexible circuit (14) within the mold cavity is pre-coated with a material that ensures good adhesion with the molding compound (30), and a heat exchanger (26) thermally coupled to the portion of the flexible circuit (14) that protrudes from the mold protects the flexible circuit (14) from damage due to thermal conduction from the mold (18, 20) and mold compound (30).
Abstract:
The dielectric-forming composition according to the invention is characterized by consisting of: composite particles for dielectrics in which part or all of the surfaces of inorganic particles with permittivity of 30 or greater are coated with a conductive metal or a compound thereof, or a conductive organic compound or a conductive inorganic material; and (B) a resin component constituted of at least one of a polymerizable compound and a polymer. In addition, another dielectric-forming composition according to the invention is characterized by containing: ultrafine particle-resin composite particles composed of (J) inorganic ultrafine particles with the average particle size of 0.1 mu m or smaller, and (B) a resin component constituted of at least one of a polymerizable compound and a polymer, wherein part or all of the surfaces of the inorganic ultrafine particles (J) are coated with the resin component (B), and the ultrafine particle-resin composite particles contain 20% by weight or more of the inorganic ultrafine particles (J); and inorganic particles with the average particle size of 0.1 to 2 mu m and permittivity of 30 or greater, or inorganic composite particles in which a conductive metal or a compound thereof, or a conductive organic compound or a conductive inorganic material is deposited on the part or all of the surfaces of the inorganic particles.
Abstract:
Coated particles having excellent connection reliability. The coated particles each comprises a core particle having a surface layer made of a metal, wherein the core surface has been partly modified with an organic compound through a functional group (A) having bondability to the metal.
Abstract:
Epoxy laminates incorporate up to 20 wt.% talc particles, particularly pure Montana platy talc particles having a maximum particle size of about 40 νm providing improved drilling performance, reduced dust formation, and improved Z-direction CTE, particularly when the epoxy resin has a Tg of about 150 °C or higher. The talc is selected from those which do not significantly reduce the electrical strength of the laminate relative to those which contain no talc particles. Characteristically, the talcs will have less than 5 wt.% impurities and less than 0.01 wt.% (100 wt.ppm) water extractable anions.
Abstract:
It is an object of the invention to provide coated particles excellent in the reliability of connection. The invention provides coated particles each comprising a metal-surfaced particle as a core and resulting from a partial surface modification of that core particle with an organic compound via a functional group (A) capable of binding to a metal.
Abstract:
The present invention provides glass fiber strands impregnated with non-abrasive solid particles which provide interstitial spaces of at least 3 micrometers between adjacent fibers within a strand which are useful for reinforcing composites.
Abstract:
The present invention provides an at least partially coated fiber strand comprising a plurality of fibers, the coating comprising an organic component and lamellar particles having a thermal conductivity of at least 1 Watt per meter K at a temperature of 300K. The present invention also provides an at least partially coated fiber strand comprising a plurality of fibers, the coating comprising an organic component and non-hydratable, lamellar particles. The present invention further provides an at least partially coated fiber strand comprising a plurality of fibers having a resin compatible coating composition on at least a portion of a surface of at least one of said fibers, the resin compatible coating composition comprising: (a) a plurality of discrete particles formed from materials selected from non-heat expandable organic materials, inorganic polymeric materials, non-heat expandable composite materials and mixtures thereof, the particles having an average particle size sufficient to allow strand wet out; (b) at least one lubricious material different from said plurality of discrete particles; and (c) at least one film-forming material. The present invention also provides an at least partially coated fiber strand comprising a plurality of glass fibers having a resin compatible coating composition on at least a portion of a surface of at least one of said glass fibers, the resin compatible coating composition comprising: (a) a plurality of lamellar, inorganic particles having a Mohs' hardness value which does not exceed the Mohs' hardness value of said glass fibers; and (b) at least one polymeric material. The present invention further provides an at least partially coated fiber strand comprising a plurality of glass fibers having a resin compatible coating composition on at least a portion of a surface of at least one of said glass fibers, the resin compatible coating composition comprising: (a) a plurality of hollow, non-heat expandable organic particles; and (b) at least one lubricious material different from the at least one hollow organic particle.
Abstract:
The present invention provides an at least partially coated fiber strand comprising a plurality of glass fibers having a resin compatible coating composition on at least a portion of a surface of at least one of said glass fibers, the resin compatible coating composition comprising: (a) a plurality of lamellar, inorganic particles and (b) at least one polymeric material. The present invention further provides that the resin compatible coating composition comprises (a) a plurality of discrete particles formed from materials selected from non-heat expandable organic materials, inorganic polymeric materials, non-heat expandable composite materials and mixtures thereof, the particles having an average particle size sufficient to allow strand wet out; (b) at least one lubricious material different from said plurality of discrete particles; and (c) at least one film-forming material. The present invention further provides that the resin compatible coating composition comprises (a) a plurality of hollow, non-heat expandable organicparticles; and (b) at least one lubricious material different from the at least one hollow organic particle.