Patent ID: 7202127
Filing Date: 2007-04-10
Classification: H01L

Abstract:
1. A method of forming a plurality of capacitors, comprising: forming a plurality of capacitor electrode openings within capacitor electrode-forming material received over a substrate, a first set of the plurality of capacitor electrode openings being formed to a depth which is greater within the capacitor electrode-forming material than is a second set of the plurality of capacitor electrode openings; forming conductive first capacitor electrode material within the first and second sets of the plurality of capacitor electrode openings, the first capacitor electrode material comprising respective bases within the first and second sets of the plurality of capacitor electrode openings; forming a sacrificial retaining structure elevationally over both the first capacitor electrode material and the capacitor electrode-forming material, the retaining structure leaving some of the capacitor electrode-forming material exposed; with the sacrificial retaining structure over the substrate, etching at least some of the capacitor electrode-forming material from the substrate effective to expose outer sidewall surfaces of the first capacitor electrode material; and after the etching, removing the sacrificial retaining structure from the substrate and then forming capacitor dielectric material and conductive second capacitor electrode material over the outer sidewall surfaces of the first capacitor electrode material formed within the first and second sets of capacitor openings.