Patent ID: 8268695
Filing Date: 2012-09-18
Classification: H01L

Abstract:
1. A method of forming a capacitor, comprising: forming a sacrificial support material over a semiconductor substrate; the support material containing at least 20 at % carbon and comprising titanium and silicon dispersed within the carbon; the titanium being within the support material within a range of from greater than 0 at % to less than or equal to 7.7 at %, and the silicon being within the support material within a range of from greater than 0 at % to less than or equal to 12.5 at %; forming an opening through the support material to the substrate, the support material having a thickness and the opening having an aspect ratio of 20:1 or greater within the thickness of the support material; the opening exposing a node comprising a conductively-doped semiconductor material; epitaxially growing a stud electrode of a stud capacitor within the opening; the stud electrode comprising in situ-doped silicon and/or in situ-doped germanium; the stud electrode having planar vertical sidewalls; removing the entirety of the sacrificial support material to expose the planar vertical sidewalls of the stud electrode; forming a capacitor dielectric material over the stud electrode and along the exposed planar vertical sidewalls; and forming a second capacitor electrode over the capacitor dielectric material.