Patent ID: 9059115
Filing Date: 2015-06-16
Classification: H01L

Abstract:
1. A method of forming substantially vertical electrically conductive structures, comprising: photolithographically forming a series of laterally spaced-apart photoresist features over a substrate, each of the features having a substantially uniform lateral width, and simultaneously photolithographically forming another photoresist feature adjacent an end of said series; the other photoresist feature being spaced from the end of said series by a gap, and having a lateral width that is no more than three-times the substantially uniform width of the spaced-apart photoresist features; forming an electrically conductive material over and between the spaced-apart photoresist features, over the other photoresist feature, and within the gap between the other photoresist feature and the end of the series of spaced-apart photoresist features; anisotropically etching the electrically conductive material to entirely remove the electrically conductive material from on top of the spaced-apart photoresist features and from on to of said other photoresist feature; the anisotropic etching forming the electrically conductive material into a plurality of first vertical structures along sidewalls of the series of spaced-apart photoresist features, and into a second vertical structure along a sidewall of the other photoresist feature; and removing the second vertical structure from over the substrate while leaving the first vertical structures remaining over the substrate.