Patent ID: 7811855
Filing Date: 2010-10-12
Classification: H01L,H05K

Abstract:
1. A method for producing a matrix of electromagnetic radiation detectors, consisting of a plurality of elementary detection modules mounted on an interconnection substrate, said elementary modules themselves comprising at least one circuit for detecting said radiation associated with a hybridization read circuit, said read circuit being joined to the interconnection substrate by hybridization, comprising the steps of: depositing on the interconnection substrate a predefined number of quantities of solder or hybridization material, intended to constitute the hybridization bumps with the elementary modules, and in at least two arrays, respectively a first array for the nominal hybridization, and at least one second array, at least said first array for nominal hybridization being connected to interconnection pins via conducting metal tracks, the deposits of solder or hybridization material of said second array or arrays being lower in volume than those of said first array; depositing a soldering material on the interconnection substrate provided with these at least two arrays, a flux of material in liquid form performing the functions of deoxidation of said solder or hybridization material, of limiting the reoxidation of said material after effective completion of said soldering, of heat transfer, in addition to decreasing the surface tension; mounting the elementary modules to be hybridized on the interconnection substrate; and then raising the temperature of a chamber in which the various elements to be hybridized are positioned until reaching at least the melting point of the solder or hybridization material in order to complete the effective soldering or hybridization of the elementary modules to the interconnection substrate together by reflow effect of said first array of hybridization bumps.