Patent ID: 6552434
Filing Date: 2003-04-22
Classification: H01L

Abstract:
A semiconductor device comprising:a semiconductor substrate in which an element is formed; and an interconnection formed on said semiconductor substrate and connected to said element, wherein said interconnection is formed of fine interconnections divided by diffusion barrier layers so as to be shorter than the Blech critical length, said diffusion barrier layers are made of a material including a main component element of said fine interconnections which acts as a diffusion barrier against the main component element of said fine interconnections, and an expression is fulfilled: (DB/Dline)/LW&lE;0.1, where DB is a mutual diffusion coefficient of said main component element in said diffusion barrier layers, Dline is a self diffusion coefficient of said main component element and LW [&mgr;m] is an average layer thickness of said diffusion barrier layers in the longitudinal direction of said interconnection.