Patent ID: 7666777
Filing Date: 2010-02-23
Classification: H01L,H05K,Y02P

Abstract:
1. A method for producing a semiconductor device with a wiring substrate and a number of virtually spherical, solderable connecting structures, the method comprising: providing a wire-like body with a core of an electrically conducting first material and a cladding of an electrically insulating second material; separating the wire-like body into cylindrical segments with the core of the electrically conducting first material being exposed at ends of the cylindrical segments, wherein the cylindrical segments have an aspect ratio of around 1, the aspect ratio defined as a ratio of a length to a diameter of the cylindrical segments; working the cylindrical segments by rounding off the edges of the cladding at the ends of the cylindrical segments to form socket elements virtually in the form of a sphere with flattened poles having a cylindrical core comprising the core of electrically conducting first material, a lateral surface comprising the cladding of electrically insulating second material, and the flattened poles forming a bottom surface and a top surface comprising the exposed ends of the cylindrical core of electrically conducting first material; providing a wiring substrate with a wiring structure having regions for semiconductor devices and, outside these regions, positions with contact terminal areas for attaching solderable connecting structures; loading the contact terminal areas with the socket elements as solderable connecting structures; soldering the socket elements onto the contact terminal areas, the socket elements aligning themselves in such a way that the longitudinal axis of their core stands perpendicularly on the contact terminal area so that one of the bottom and top surfaces aligns with the contact terminal area; and loading the semiconductor device position with a semiconductor device while connecting the semiconductor device to the wiring structure.