Abstract:
An ink contains particles containing metal that reacts during sintering to produce an electrically conductive line or area having a diffusivity that is less than the diffusivity of the metal before the reaction. Resulting electronic circuits therefore exhibit longer useful lives, compared to conventionally inkjet printed circuits.
Abstract:
A method of flip-chip mounting a circuit to a substrate is provided by brazing together metallic elements formed on both the circuit and substrate. The brazing being achieved by initiating a chemical exothermic reaction in a multilayer stacked material disposed between the metallic elements on the circuit and substrate. Advantageously the chemical exothermic reaction provides a means of locally brazing the metallic elements without necessitating raising the circuit and substrate to a high temperature such as required in conventional flip-chip assembly with solder reflow. According to an exemplary embodiment of the invention the metallic elements are electrical conductors and an electrical trigger signal is provided via the metallic elements to initiate the chemical exothermic reaction.
Abstract:
In a multilayer wiring board, on an insulating board (10), an arbitrarily formed first conductivity type pattern (12), an insulating material layer (16A) and a second conductivity type pattern (20) formed by applying a conductive material in a pattern on a region corresponding to a graft polymer pattern (18) formed on the insulating material layer are subsequently provided. The multilayer wiring board is provided with a conductive path (22) which electrically connects the first conductivity type pattern and the second conductivity type pattern existing on the insulating substrate. The graft polymer pattern consists of a region wherein a graft polymer exists and a region wherein the graft polymer does not exist, or it consists of a region wherein a hydrophilic graft polymer exists and a region wherein the hydrophobic graft polymer does not exist.
Abstract:
A self-joining polymer composition, comprising a polymer, a plurality of amine pendant groups attached to the polymer and a plurality of microcapsules of flowable polymerizable material dispersed in the polymer where the microcapsules of flowable polymerizable material including microcapsules and flowable polymerizable material inside the microcapsules. The microcapsules are effective for rupturing with a failure of the polymer so the flowable polymerizable material cross-links with the reactable pendant groups upon rupture of the microcapsules.
Abstract:
A process for producing an electrical apparatus by electrically and mechanically bonding two objects to be bonded to each other, which comprises hot-pressing an adhesive layer (25) formed on an LCD (11) against a second hardener layer (28) formed on a TCP (15) while keeping them in close contact with each other, whereby a first hardener contained in the adhesive layer (25) reacts with a second hardener constituting the second hardener layer (28) to polymerize a thermosetting resin contained in the adhesive layer (25) and thereby bond the LCD (11) to the TCP (15). When a metal chelate or metal alcoholate and a silane coupling agent are used respectively as the first and second hardeners, then cations generate by the reaction of the silane coupling agent with the metal chelate and the thermosetting resin undergoes cationic polymerization due to the cations. Thus, in bonding the LCD (11) to the TCP (15), the adhesive can be cured at a lower temperature in a shorter time than conventional adhesives.
Abstract:
A composition of matter having a metal powder or powders of specified characteristics in a Reactive Organic Medium (ROM). These compositions can be applied by any convenient printing process to produce patterns of electrical conductors on temperature-sensitive electronic substrates. The pattern can be thermally cured in seconds to form pure metal conductors at a temperature low enough to avoid damaging the substrate.
Abstract:
In accordance with the invention a reactive multilayer foil is fabricated by providing an assembly (stack or multilayer) of reactive layers, inserting the assembly into a jacket, deforming the jacketed assembly to reduce its cross sectional area, flattening the jacketed assembly into a sheet, and then removing the jacket. Advantageously, the assembly is wound into a cylinder before insertion into the jacket, and the jacketed assembly is cooled to a temperature below 100 DEG C during deforming. The resulting multilayer foil is advantageous as a freestanding reactive foil for use in bonding, ignition or propulsion.
Abstract:
A printing cliché with a pattern-type structure is set on a plate cylinder (6, 16) of each of the two printing units (2, 3) of a printing device (1). A printing medium is applied to the printing cliché, said printing medium being transferred onto a printing cylinder (8, 18) in the form of a conductive pattern via a rubber blanket cylinder (7, 17). The printing cylinders of the two printing units, which form a gap (38) through which individual rigid substrates (14, 14) or a flexible substrate sheet (24) pass or passes, print the metallized front and back surfaces of the substrates or the substrate sheet with the conductive patterns.