Abstract:
An advanced back-end-of-line (BEOL) metallization structure is disclosed. The structure includes a bilayer diffusion barrier or cap, where the first cap layer is formed of a dielectric material preferably deposited by a high density plasma chemical vapor deposition (HDP CVD) process, and the second cap layer is formed of a dielectric material preferably deposited by a plasma-enhanced chemical vapor deposition (PE CVD) process. A method for forming the BEOL metallization structure is also disclosed. The invention is particularly useful in interconnect structure comprising low-k dielectric material for the inter-layer dielectric (ILD) and copper for the conductors.
Abstract:
PROBLEM TO BE SOLVED: To provide an advanced back-end-of-line (BEOL) interconnect structure provided with a hybrid dielectric body. SOLUTION: Inter layer dielectric body (ILD) for a via level is preferably different from an ILD for a line level. In a preferable embodiment, the ILD the via level is formed with a low-k SiCOH material, and the ILD for the line level is formed with a low-k polymer thermosetting material. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
An advanced back-end-of-line (BEOL) interconnect structure having a hybrid dielectric is disclosed. The inter-layer dielectric (ILD) for the via level is preferably different from the ILD for the line level. In a preferred embodiment, the via-level ILD is formed of a low-k SiCOH material, and the line-level ILD is formed of a low-k polymeric thermoset material.