Abstract:
The present invention provides an electrically conductive adhesive composition having cured low modulus elastomer and metallurgically-bonded micron-sized metal particles and nano-sized metal particles. The low modulus elastomer provides the mechanical robustness and reliability by relieving the stresses generated; and the metallurgically-bonded micron-sized metal particles and nano-sized metal particles provide a continuous conducting path with minimized interface resistance. Addition of nano-sized metal particles lowers the fusion temperature and allows the metallurgical-bonding to occur at manageable temperatures.
Abstract:
A conductive adhesive containing conductive particles and resin, and a circuit bonded with this adhesive. This conductive adhesive is characterized in that 30wt% or more of the conductive particles consists substantially of silver and tin, and in that the molar ratio between silver and tin that are the metal components of the conductive adhesive is in the range of 77. 5:22.5 to 0:100.
Abstract:
A conductive adhesive essentially made of a conductive filler and a binder resin wherein the content ratio of the conductive filler is in the range of 20-70 wt.%. At least part of the conductive filler is preferably provided with a protrusion and a dendrite metal filler is preferably employed. When the adhesive is pressed, resin component is squeezed out to leave the conductive filler component with high concentration and an electrode can be connected by scratching the surface thereof. The conductive adhesive (3) is formed on an electrode (2) of a circuit board (1) without using any solder and an electronic component (4) can be mounted thereon. The initial and long term reliabilities of the is improved conductive adhesive by improving the contact state between the conductive filler and the electrode, and an apparatus and a method for mounting an electronic component using the conductive adhesive can be provided.
Abstract:
A conductive paste for producing a via conductor excellent in quality and performance, having a low resistance, free from defects such as voids and cracks, and manufactured by the ceramic multilayer substrate technique, and a ceramic multilayer substrate excellent in quality and performance and manufactured by using such a conductive paste. A via hole (12) made in a green sheet (10) is filled with a conductive paste (20) containing a conductive powdercontaining 95 weight % or more of Ag powder of average grain diameter of 3 to 10 mu m based on the whole conductive powder and an organic vehicle and not containing glass frit. Heat-shrinkage suppressing sheets (30) are laminated on both sides of a green sheet laminate (S), and the resultant laminate is baked thereby to produce a ceramic multilayer substrate. No difference between the behaviors of the green sheet (10) and the conductive paste (20) is caused when sintered.
Abstract:
The invention relates a method for soft soldering metals onto a soldering joint, wherein a soft solder liquefied as a result of heating is brought into contact with the metal components to be joined on the solder joint and then cooled to produce a solid soldered joint. The invention is characterized in that at least one reaction component is provided on the soldering joint and reacts exothermally with at least one other component by heating it to a melting temperature so that the local temperature in the soldering joint rises to a solder-melting temperature.
Abstract:
Electrical conductors (30) are bonded to an insulating substrate (10) by partially embedding granulated electrically conductive material (22) in said insulating substrate to provide exposed unembedded portions thereof, and binding the exposed portions of said partially embedded granules (34 and 36) in an electrically conductive matrix.
Abstract:
To provide: an electronic component which comprises a copper electrode on an inorganic material substrate and wherein the adhesion strength between the substrate and the copper electrode is high, thereby achieving improved adhesion of the copper electrode; and a method for manufacturing this electronic component. An electronic component which comprises a copper electrode on an inorganic material substrate and wherein an interface layer containing copper, manganese, silicon and oxygen is provided at the interface between the substrate and the copper electrode, and the interface layer contains crystal grains that are mainly formed of copper and dispersed in the interface layer. A method for manufacturing this electronic component comprises: an interface layer formation step for forming an interface layer on the substrate; and an electrode formation step for forming the copper electrode on the interface layer.