Patent ID: 8084347
Filing Date: 2011-12-27
Classification: H01L

Abstract:
1. A method of making a semiconductor device, comprising: forming at least one layer over a substrate; forming at least two spaced apart features of imagable material over the at least one layer, wherein the at least two spaced apart features comprise a plurality of features; forming sidewall spacers on the plurality of features, such that the sidewall spacers on adjacent features along at least two predetermined directions contact each other to form fully enclosed interstitial spaces located between the sidewall spacers; filling a space between a first sidewall spacer on a first feature and a second sidewall spacer on a second feature with a filler feature; selectively removing the sidewall spacers to leave the first feature, the filler feature and the second feature spaced apart from each other; and etching the at least one layer using the first feature, the filler feature and the second feature as a mask.