Patent ID: 9142454
Filing Date: 2015-09-22
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor structure, comprising: forming a first conductive structure on a substrate; forming a second conductive structure on the substrate, the second conductive structure comprising an upper conductive portion, wherein the upper conductive portion has a material different from a material of the first conductive structure; forming a lower dielectric portion of a dielectric structure on the first conductive structure and the second conductive structure; forming a dielectric layer on the lower dielectric portion; forming an upper dielectric portion of the dielectric structure on the dielectric layer, wherein the dielectric layer has a material different from materials of the upper dielectric portion and the lower dielectric portion; forming a first conductive plug passing through only the upper dielectric portion, the dielectric layer and the lower dielectric portion to physically and electrically contact with the first conductive structure; and forming a second conductive plug passing through the upper dielectric portion, the dielectric layer and the lower dielectric portion to physically and electrically contact with the second conductive structure; wherein the first conductive plug and the second conductive plug have different aspect ratios.