Patent ID: 7897436
Filing Date: 2011-03-01
Classification: B81C,H01L

Abstract:
1. Process for packaging a number of micro-components such as electromechanical micro-systems on the same substrate wafer, this process including an operation including enclosing each micro-component in a cavity surrounded by at least two walls, one of which is formed by the substrate, wherein it comprises a preparatory operation consisting of making a covering plate sized to simultaneously cover several micro-components or all micro-components in the wafer and formed from a stack comprising at least one matrix made of a mechanically and chemically stable material in a lower face in which depressions are formed, a layer of polymer material deposited on the lower face of the matrix and in which a lower face remote from the matrix is provided with depressions approximately reproducing the shape of the depressions in the matrix, and a metal layer deposited on the lower face of the layer of polymer material and the lower face of which is provided with depressions approximately reproducing the depressions on the lower face of the layer of polymer material, this process also comprising a sealing step including a covering operation followed by concomitant pressing and heating operations, leading to the metal layer being sealed onto the upper face of the wafer and leading to the metal layer being separated from the layer of polymer material, the metal layer thus forming a second wall for each cavity, and a release operation subsequent to the sealing step, comprising releasing the matrix from the layer of polymer material, by at least partially dissolving this layer in a solvent, the matrix thus being re-useable.