Patent ID: 9087795
Filing Date: 2015-07-21
Classification: H01L

Abstract:
1. An electrical interconnect comprising; a first polymer layer, the first polymer layer defining a first surface of the electrical interconnect; a plurality of connection elements, each connection element being attached to the first surface such that each connection element protrudes from the first polymer layer; a plurality of connection pads separated from the plurality of connection elements by at least the first polymer layer; and a plurality of collections of discrete conductive connections, each collection being associated with a particular connection element, and each collection being arranged such that each discrete conductive connection in that collection electrically connects said particular connection element of the plurality of connection elements to a connection pad of the plurality of connection pads through the first polymer layer in parallel with other discrete conductive connections of the plurality of discrete conductive connections in that collection; wherein the discrete conductive connections are further arranged such that at least part of each discrete conductive connection makes contact with said particular connection element directly underneath that connection element; wherein a quantity of conductive connections in each connection element's respective collection of discrete conductive connections varies with respect to a distance of each particular connection element from a neutral point of the plurality of connection elements, said neutral point being a position on said first surface at which a connection element of said plurality of connection elements would be subjected to a lower amount of thermal stress as temperature varies than it would be if positioned elsewhere on said first surface; and wherein parts of the electrical interconnect that lie directly beneath the connection elements, which are further away from the neutral point of the plurality of connection elements, have a greater ratio of first polymer layer material to conductive connection material than parts of the electrical interconnect that lie directly below connection elements closer to the neutral point of the electrical interconnect.