Patent ID: 9159780
Filing Date: 2015-10-13
Classification: H01L

Abstract:
1. A method of forming capacitors, comprising: forming support material over a substrate; forming covering material elevationally over the support material; forming a first capacitor electrode within individual openings that extend through the covering material and into the support material; after forming the first capacitor electrode within the individual openings, conducting an anisotropic etching step to anisotropically etch openings through the covering material to the support material; isotropically first etching only partially into the support material using a liquid etching fluid to expose an elevationally outer portion of sidewalls of individual of the first capacitor electrodes, no additional etching step occurring between said anisotropic etching step and said isotropic first etching using the liquid etching fluid; second etching into the support material using a dry etching fluid to expose an elevationally inner portion of the sidewalls of the individual first capacitor electrodes; and forming a capacitor dielectric over the outer and inner portions of the sidewalls of the first capacitor electrodes and forming a second capacitor electrode over the capacitor dielectric.