Patent ID: 6559004
Filing Date: 2003-05-06
Classification: H01L

Abstract:
A method for forming a three dimensional semiconductor structure, comprising:providing a substrate, said substrate is covered by a first dielectric layer; forming a first metal structure and a second metal structure at the top of the surface within said first dielectric layer, said second metal structure being separated from said first metal structure; forming a second dielectric layer, a plurality of third metal structures, and a fourth metal structure over said substrate, wherein said third metal structures are horizontal arranged over said first metal structure and disposed at the top of the surface within said second dielectric layer, each said third metal structure being separated from others so let a plurality of gaps be formed and filled by said second dielectric layer, wherein said fourth metal structure is disposed over said second metal structure and disposed at the top of the surface within said second dielectric layer; forming a fourth dielectric layer over said second dielectric layer, said third metal structures, and said fourth metal structure; forming a first mask over said fourth dielectric layer, said first mask exposing partial said fourth dielectric layer which is disposed over both said gaps and part of said third metal structures that is disposed between said gaps; removing partial said fourth dielectric layer that are exposed by said first mask and partial said second dielectric layer that located in an on said gaps; removing said first mask; forming a plurality of third dielectric layers over both said third metal structures and said first metal structure, wherein each said gap is partially filled by said third dielectric layers, the dielectric constant of said third dielectric layers being higher than the dielectric constant of other said dielectric layers; forming a second mask over fourth dielectric layer, said second mask exposing partial said fourth dielectric layer which is disposed over said fourth metal structure; removing partial said fourth dielectric layer that are exposed by said second mask; removing said second mask and partial said third dielectric layers that located on the top surface of said fourth dielectric layer; and forming a plurality of fifth metal structures within said fourth dielectric layer and over both said fourth metal structure and said third metal structures, said fifth metal structures also filling said gaps so let said gaps be totally filled by both said third dielectric layers and said fifth metal structures.