Patent ID: 7939422
Filing Date: 2011-05-10
Classification: H01L

Abstract:
1. A method for forming a semiconductor structure, comprising: forming a plurality of features across a surface of a substrate, at least one space being between two adjacent features; forming a first dielectric layer on the features and within the at least one space, wherein the first dielectric layer forms a narrower gap above the opening of the at least one space than a lateral gap deeper within the at least one space; interacting a portion of the first dielectric layer with a reactant, the reactant derived from a first precursor and a second precursor, to form a first solid product, wherein the solid product comprises material from both the reactant and the first dielectric layer; decomposing the first solid product to substantially remove the portion of the first dielectric layer; and forming a second dielectric layer to substantially fill the at least one space.