Abstract:
A resin matrix with resistances to alkali and acid includes at least any one of insulative organic particles and insulative composite particles having an organic component and an inorganic component with the total amount of these particles being in the range of 5-50% by volume, wherein the insulative organic particles and the organic component of the insulative composite particles are allowed to be corroded by either alkali or acid, and wherein not less than 90% by volume of the insulative organic particles and insulative component particles have a particle diameter in the range of 1-20 micrometers.
Abstract:
A resin matrix with resistances to alkali and acid such as a fluorene-containing epoxy acrylate and/or a benzocyclobutene resin includes at least any one of insulative organic particles and insulative composite particles having an organic component and an inorganic component with the total amount of these particles being in the range of 5-50% by volume, wherein the insulative organic particles and the organic component of the insulative composite particles are allowed to be corroded by either alkali or acid, and wherein not less than 90% by volume of the insulative organic particles and insulative composite particles have a particle diameter in the range of 1-20 micrometers.
Abstract:
A laminated circuit board comprising a high frequency, low dielectric, and low dissipation factor foam substrate layer and at least one metal cladding layer laminated to the foam substrate layer. The foam substrate layer is formed of a closed-cell polyisocyanurate rigid foam having a closed-cell structure greater than 95%.
Abstract:
A method of producing multi-layered ceramic circuit boards comprising laminated, component ceramic layers containing at least one hollow inorganic powder and at least one non-hollow inorganic powder. Signal transmitting conductor patterns of the boards are free from an irregular cross-sectional profile which is caused by particles of the hollow inorganic powder contained in the component ceramic layers. These multi-layered ceramic circuit boards are particularly useful for high speed transmission of digital signals of particularly high frequency.
Abstract:
An article of manufacture comprising a circuit board construction which comprises a composite of a electronic circuit provided on a dielectric article in which the article comprises a layer of syntactic film.
Abstract:
A method of making printed circuit boards, particularly 3-Dimensional circuit boards, wherein a surface layer of micron sized hollow spheres, beads or spacers are ruptured or fractured in a pattern defining the electrical circuit. The circuit pattern is thermally sprayed with molten copper particles. The molten copper particles shape themselves to the nooks, crannies and undercuts of the fractured spheres or beads to mechanically lock the electrical circuitry to the board. The current carrying capacity can be adjusted by the thickness of the sprayed metal. The overspray does not adhere to smooth non porous surfaces adjacent the fractured spheres or beads.
Abstract:
A circuit subassembly is disclosed comprising a conductive metal layer and a dielectric substrate layer having a dielectric constant of less than about 3.5 and a dissipation factor of less than about 0.006 at 10 GHz, wherein the composition of the dielectric substrate layer comprises about 5 to about 70 volume percent of borosilicate microspheres that have been treated with an alkaline solution.
Abstract:
A bulk dielectric material comprises a solid composite material comprising a solid matrix material and a plurality of filler elements distributed within the matrix material. The bulk dielectric material has, at a frequency greater than 1 MHz, (i) a permittivity having a real part of magnitude greater than 10 and an imaginary part of magnitude less than 3, and (ii) an electrical breakdown strength greater than 5 kV/mm and has a minimum dimension greater than 2 mm.
Abstract:
A bulk dielectric material can include a solid composite material having a solid matrix material and a plurality of filler elements distributed within the matrix material. The bulk dielectric material can have, at a frequency of greater than 1 MHz, (i) a permittivity with a real part of magnitude greater than 10 and an imaginary part of magnitude less than 3, and (ii) an electrical breakdown strength greater than 5 kV/mm and can have a minimum dimension greater than 2 mm.