Patent ID: 8664778

Claim:
A method for manufacturing a microelectronic assembly comprising at least one first and one second microelectronic components placed one on top of the other and between which is formed at least one tight cavity embedded in a filling material, comprising: defining said cavity by means of a lateral wall forming a closed frame extending around a determined area of the first component except for an opening used as a vent; forming within the closed frame and opposite to the vent an obstacle capable of forming, in cooperation with the lateral wall, a bypass duct or line for the filling material; performing a flip-chip hybridization of the first and second components, a surface of the second component resting on the upper edge or end of the lateral wall formed on the first component to form said at least one cavity; injecting the filling material in liquid form between the two hybridized components to embed said at least one cavity and to make it tight by obstruction of the vent as said filling material solidifies; the length of the bypass duct being greater than the distance traveled by the filling material between its presentation at the level of the vent and the moment when the filling material solidifies.