Societe Francaise De Detecteurs Infrarouges-sofradir

Bernard Pitault

A method for producing a matrix of electromagnetic radiation detectors made up of a plurality of elementary detection modules mounted on an interconnection substrate. The method includes depositing on the interconnection substrate a predefined number of quantities of solder or hybridization material, intended to constitute hybridization bumps for the elementary modules, in at least a first array for the nominal hybridization, and at least one second array, with the deposits of solder or hybridization material of the second array being lower in volume than those of the first array, depositing a liquid flux on the interconnection substrate, mounting the elementary modules to be hybridized on the interconnection substrate, and 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 to join the modules and interconnection substrate together by reflow effect.

Method for producing a matrix for detecting electromagnetic radiation and method for replacing an elementary module of such a detection matrix

Disclosed is a method for producing an array for detecting electromagnetic radiation, the array including a elementary detection modules mounted on an interconnect substrate, the modules comprising at least one circuit for detecting the radiation, connected to a read circuit by hybridization, the read circuits being attached to the interconnect substrate, the method including making, on the rear face of read circuit of each of the elementary modules grooves or slots, and areas without such grooves or slots; mounting, on the front face of the interconnect substrate, and on the front face of the detection circuit, registration features that ensure accurate positioning of each of the elementary modules on the interconnect substrate; pressing each elementary module onto the interconnect substrate after positioning; ensuring migration of the adhesive through grooves or slots; raising the temperature of the chamber used to produce the array to cure of the adhesive.

Growing community of inventors

Saint Etienne de Crossey, France

Bernard Pitault