Patent ID: 6708405
Filing Date: 2004-03-23
Classification: H01L,Y10T

Abstract:
A method of producing an electrically conducting connection through insulating layers, which comprises the following method steps:providing a semiconductor substrate with at least one insulating layer; applying a mask to a surface of the at least one insulating layer; carrying out a substantially isotropic etching step; carrying out a substantially anisotropic etching step until an underside of the at least one insulating layer is reached and a contact hole is produced; removing the mask; filling the contact hole with a first conducting material; etching back the first conducting material down to a prescribed depth; filling a free region of the contact hole with at least one second conducting material; forming an adhesion-promoting layer between the first conducting material and the second conducting material; and applying a third conducting material to the second conducting material, the third conducting material having barrier material for suppressing the diffusion of oxygen atoms.