Patent ID: 9224704
Filing Date: 2015-12-29
Classification: H01L

Abstract:
1. A semiconductor system, comprising: a first substrate and a second substrate, with both substrates including a connecting structure, wherein each of the first and second substrates has at least a first surface, and is 3D integrated with the other substrate along the first surface, wherein the 3D integration is misaligned and has a lateral misalignment in at least one dimension having a misalignment value in a direction of lateral misalignment parallel to the first surface of each of the first substrate and the second substrate; and each connecting structure includes a diffusion barrier structure for preventing diffusion of elements out of a conductive layer of the substrate, with the diffusion barrier structure of the first substrate preventing diffusion of elements from a conductive layer of the second substrate into the first substrate and the diffusion barrier structure of the second substrate preventing diffusion of elements from a conductive layer of the first substrate into the second substrate, and with each diffusion barrier structure configured so that a first end surface of each diffusion barrier structure, which is the most outward surface of the diffusion barrier oriented substantially parallel to the first surface of that substrate, has a length in the direction of the lateral misalignment, with the length being at least 20 nm and greater than the misalignment value so as to prevent diffusion of elements out of a conductive layer of the other substrate, and wherein the surface of the diffusion barrier structure is flush with the surface of the connecting structure and the substrate in which it is embedded.