Patent ID: 8154064
Filing Date: 2012-04-10
Classification: H01L,Y10S

Abstract:
1. A semiconductor construction, comprising: a semiconductor substrate; a first capacitor electrode extending upwardly from the substrate and having a tubular first end proximate the substrate, a partially tubular second end, and a tubular midsection between the first end and the second end; the first end being nearer the substrate than the second end; a second capacitor electrode capacitively coupled to inner surfaces of the first and second ends and the midsection of the first capacitor electrode; and a retaining structure against the second end of the first capacitor electrode and a sidewall of a feature of the semiconductor construction that is distinct from the first capacitor electrode, the retaining structure physically joining the first capacitor electrode to the sidewall and electrically isolating the first capacitor electrode from the sidewall, and portions of the second capacitor electrode being located above and underneath the retaining structure; wherein the first end of the first capacitor electrode encircles a first portion of the second capacitor electrode and the second end of the first capacitor electrode only partially encircles a second portion of the second capacitor electrode, the first and second portions of the second capacitor electrode being sized to fit within the bore of the tubular midsection of the first capacitor electrode.