Patent ID: 8288250
Filing Date: 2012-10-16
Classification: H01L

Abstract:
1. Method for making a stack of at least two stages of circuits, each stage comprising a substrate and one or more components and metallic connections formed in or on this substrate, the assembly of a stage to be transferred onto a previous stage comprising: a) ionic implantation in the substrate of the stage to be transferred through an implantation surface of this substrate and through at least one part of the one or more components, so as to form a weakened zone under at least part of said at least one component of this substrate, b) then formation of metallic connections of said components in this substrate between each other and/or in order to connect said at least one component to other components, c) then transfer and assembly of part of this substrate, comprising said one or more components, through its implantation surface onto the previous stage comprising one or more components and metallic connections, d) then a step to thin the transferred part of said substrate by fracture along the weakened zone.