摘要:
A low loss capacitance and low loss insulating dielectric material consisting of a thermosetting resin, thermoplastic resin, a cross-linker, and containing a quantity of ferroelectric ceramic nano-particles of barium titanate within. The combined low loss insulating dielectric layer and a low loss capacitive layer resulting from the material allows one continuous layer that can form internal capacitors and permit the modifying the dielectric thickness between signal layers for impedance matching within a layer of substrate. More significantly, the applied layer of low loss capacitive materials can simultaneously act as a capacitor as well as a dielectric for separation of signal layers.
摘要:
The present invention relates to a method for providing an interconnect between layers of a multilayer circuit board. A first via extending through a total thickness of a first layer is formed. The first via is totally filled with a first solid conductive plug and an end of the first solid conductive plug includes a first contact pad that is in contact with a surface of the first layer. A second via extending through a total thickness of a second layer is formed. The second via totally filling with a second solid conductive plug and an end of the second solid conductive plug includes a second contact pad that is in contact with a surface of the second layer. The second layer is electrically and mechanically coupled to the first layer by an electrically conductive adhesive that is in electrical and mechanical contact with both the end of the first plug and the end of the second plug.
摘要:
A semiconductor device having a thermoset-containing, dielectric material and methods for fabricating the same is provided. The device may take the form of a printed circuit board, an integrated circuit chip carrier, or the like. The dielectric material is a non-fibrillated, fluoropolymer matrix that has inorganic particles distributed therein and is impregnated with a thermoset material.
摘要:
A prepreg resin comprising: (a) 98 to 40% by weight based on the total weight of components (a) and (b), of a curable polyphenylene ether resin; (b) 2 to 60% by weight based on the total weight of components (a) and (b), of at least one cyanurate selected from the group consisting of triallyl isocyanurate and triallyl cyanurate; (c) a polymerization initiator comprised of a peroxide functionalized polymer, said peroxide functionalized polymer being fragmented by heat to a plurality of free radical moieties, such as t-butoxide moieties, and a relatively inert moiety having a molecular weight greater than about 1,000. The invention also encompasses a cured resin either as a coating on a substrate, without fiberglass cloth embedded, or a cured prepreg with fiberglass cloth embedded and a method of forming the same.
摘要:
A structure and method for forming a tamper respondent electronic circuit enclosure that includes an integrated circuit structure, a mesh structure surrounding the integrated circuit structure, and a sealed enclosure surrounding the mesh structure. The mesh structure includes a layer of flexible dielectric having a first side and a second side, a screen-printed pattern of flexible electrically conductive first circuit lines forming a first resistor network on the first side, and a photo lithographically-formed pattern of flexible electrically conductive second circuit lines forming a second resistor network on the second side.
摘要:
A method and arrangement for creating an impedance controlled printing wiring board, particularly the formation of a structure for high speed printed wiring boards incorporating multiple differential impedance controlled layers. Furthermore, there are provided vias of either through-holes, blind holes and buried holes filled with a conductive paste material to form electrical interconnections with conductive layers of the printed wiring board.
摘要:
Plates that are especially suitable for use in liquid crystal display structures comprising a transparent substrate; a dark mesh material on the substrate having a thickness of about 1 to about 30 microns; wherein the dark mesh material comprises a photocured photoimageable organic polymeric composition and a coloring agent; and wherein the dark mesh material has an optical density of about 0.5 to about 3 in the visible light range; and a polarizing layer are provided along with methods for their fabrication.
摘要:
A printed circuit board or card having plated through-holes is provided wherein plated through-holes are filled with a photocured polymerized composition. Also, a method for fabricating these printed circuit boards or cards is provided. Also provided are compositions and methods of providing carrier films coated with the compositions for use in filling vias or plated through-holes.
摘要:
A method of forming a capacitive core structure and of forming a circuitized printed wiring board from the core structure and the resulting structures are provided. The capacitive core structure is formed by providing a central conducting plane of a sheet of conductive material and forming at least one clearance hole in the central conducting plane. First and second external conducting planes are laminated to opposite sides of the ground plane with a film of dielectric material between each of the first and second external planes and the central conducting plane. At least one clearance hole is formed in each of the first and second external planes. A circuitized wiring board structure can be formed by laminating a capacitive core structure between two circuitized structures. The invention also relates to the structures formed by these methods.
摘要:
Triazine polymers obtained by reacting (a) monocyanate; and (b) dicyanate and/or prepolymers thereof are used in forming interconnection structures for bonding an integrated semiconductor device to a carrier substrate.