摘要:
A semiconductor device comprising a semiconductor chip, a wiring substrate, and an adhesive preferably containing electroconductive particles interposed therebetween, a plurality of spacer elements being present on or below the adhesive layer, said spacer elements having almost the same height as surrounding projecting electrodes and at least one shape selected from circles and polygons when viewed from the top, within an area surrounded by the connected electrodes, has a high flexural strength and high reliability and can be used for information cards, and the like.
摘要:
An electroconductive paste for forming an electric circuit which is low in resistivity, high in electroconductivity and minimized in change of resistivity even after a thermal shock test and/or a humidity and DC applied test, can be obtained by using a composite electroconductive powder comprising a flake-like electroconductive powder made of a material such as silver, a silver alloy, a silver-coated copper powder or a silver-coated copper alloy powder and an unsteady-shaped electroconductive powder such as a reduced silver powder. Also, by using a composite electroconductive powder comprising an electroconductive powder having an aspect ratio of 6 or greater and an electroconductive powder having an aspect ratio of 5 or less, there can be obtained an electroconductive paste which is low in resistivity, high in electroconductivity, minimized in change of resistivity even after a thermal shock test and/or a humidity and DC applied test, and capable of improving probability of contact between the electroconductive powder particles, elevating electroconductivity of the electric circuit, and also raising electroconductivity especially when a circuit is printed on a sheet-like substrate and the printed circuit is pressed. The electric circuit formed on the surface of a substrate by using such an electroconductive paste is low in resistivity, high in electroconductivity and also excellent in migration resistance.