Abstract:
Damascene processing is implemented with dielectric barrier films (50, 90, 91) for improved step coverage and reduced contact resistance. Embodiments include the use of two different dielectric films (50, 31) to avoid misalignment problems. Embodiments further include dual damascene (100A, 100B) processing using Cu metallization (100).
Abstract:
A nonporous sacrificial layer (30) is used to form conductive elements (34) such as vias or interconnects in an inlay process, resulting in smooth walled structures of the inlaid vias or interconnects and smooth walled structures of any surrounding layers such as barrier layers. After formation of the smooth walled conductive elements, the sacrificial layer (30) is removed and replaced with a porous dielectric (40), resulting in desirable porous low-k dielectric structures integrated with the smooth walled conductive elements and barrier materials.
Abstract:
A precursor (30) of a low-k porous dielectric is applied to an integrated circuit substrate (20). The precursor comprises a host thermosetting material and a porogen. Crosslinking of at least some of the first host thermosetting material is produced to form a low-k dielectric matrix without decomposing all of the porogen. This leaves a solid nonporous layer of the low-k dielectric matrix. Conductive elements (54) are then inlaid in the low-k dielectric matrix. After the conductive elements are formed, remaining porogen is decomposed to leave a porous low-k dielectric layer (58, 60). The resulting conductive elements are smooth walled.
Abstract:
A precursor (30) of a low-k porous dielectric is applied to an integrated circuit substrate (20). The precursor comprises a host thermosetting material and a porogen. Crosslinking of at least some of the first host thermosetting material is produced to form a low-k dielectric matrix (31) without decomposing all of the porogen. This leaves a solid nonporous layer of the low-k dielectric matrix. Conductive elements (36) are then inlaid in the low-k dielectric matrix. After the conductive elements are formed, remaining porogen is decomposed to leave a porous low-k dielectric layer (42). The resulting conductive elements are smooth walled.
Abstract:
Damascene processing is implemented with dielectric barrier films (50, 90, 91) for improved step coverage and reduced contact resistance. Embodiments include the use of two different dielectric films (50, 31) to avoid misalignment problems. Embodiments further include dual damascene (100A, 100B) processing using Cu metallization (100).