摘要:
A solder bond between a semiconductor chip and a substrate is improved by the addition of a region of solder which is dispersion hardened with a ternary intermetallic. In the preferred embodiment the solder is constituted by a solid solution of tin in lead and a uniformly dispersed copper/tin/palladium ternary intermetallic. One of the constituents of the ternary intermetallic is a constituent of the solder.
摘要:
A zero-insertion force connector comprising a supply means for providing a thermal source and a base means adapted to support one or more pairs of mating contacts. A reversible motion actuator means comprising a temperature responsive nickeltitanium alloy is adapted for connection to the mating contacts. The actuator means is selectively responsive to the thermal source for opening the mating contacts for providing zeroinsertion force for an electrical interconnection package having one or more pairs of electrical contacts thereon.
摘要:
An interconnection substrate for electrical circuits comprising a plurality of planar conductive metallized patterns disposed between alternating layers of a dielectric medium, and substantially normal thereto electrically conductive paths extending between at least some of said conductive metallized patterns. Diffused metallurgical bond interfaces provide mechanical and electrical connection between the conductive metallized patterns and paths.
摘要:
A process for quantitatively measuring one of the surface tension components for a solder-flux combination by introducing a gaseous ambient bubble internally coated with a liquid flux into a molten solder, and measuring a pressure differential.