Abstract:
PROBLEM TO BE SOLVED: To realize an interconnection structure that improves the adhesion between an upper low-k dielectric layer and a diffusion barrier cap dielectric layer existing therebeneath. SOLUTION: In the interconnection structure, adhesion between the upper low-k (for example, the dielectric coefficient is less than 4.0) dielectric layer (for example, a dielectric containing an element group consisting of Si, C, O, and H) and the diffusion barrier cap dielectric layer (for example, a cap layer containing an element group consisting of C, Si, N, and H) existing therebeneath is improved, by providing an adhesion transition layer in between the two layers. Because the adhesion transition layer exists between the upper low-k dielectric layer and the diffusion barrier cap dielectric layer, the possibility that the layers in the interconnection structure are separated in a packaging process is reduced. The adhesion transition layer provided here comprises a lower SiO x (or SiON) contained region and an upper C inclination region. Such a structure and, in particular, a method for forming an adhesion transition layer are also provided. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor device which includes a diffused barrier layer. SOLUTION: A semiconductor device includes a semiconductor substrate including a conductive metallic element and a diffused barrier layer in contact with the conductive metallic element is bonded to at least a part of the substrate, has upper/lower faces and a center part, formed of silicon, carbon, nitrogen and hydrogen and in which silicon is distributed nonuniformly over the whole diffused barrier layer. Thus, concentration of nitrogen near the lower and upper faces of the diffused barrier layer is higher than at the center part of the diffused barrier layer. Then, a method for manufacturing the semiconductor device is also provided.